diff --git a/build.gradle.kts b/build.gradle.kts
index f88635b8..0b8f61b2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -60,6 +60,8 @@ tasks.create<GenerateTask>("openApiGenerateMastodonCompatibleApi", GenerateTask:
     configOptions.put("interfaceOnly", "true")
     configOptions.put("useSpringBoot3", "true")
     additionalProperties.put("useTags", "true")
+    importMappings.put("org.springframework.core.io.Resource", "org.springframework.web.multipart.MultipartFile")
+    typeMappings.put("org.springframework.core.io.Resource", "org.springframework.web.multipart.MultipartFile")
 }
 
 repositories {
@@ -116,6 +118,9 @@ dependencies {
     implementation("org.springframework.security:spring-security-oauth2-jose")
     implementation("org.springframework.boot:spring-boot-starter-data-mongodb")
     implementation("org.jetbrains.exposed:exposed-spring-boot-starter:0.44.0")
+    implementation("io.trbl:blurhash:1.0.0")
+    implementation("software.amazon.awssdk:s3:2.20.157")
+
 
 
     implementation("io.ktor:ktor-client-logging-jvm:$ktor_version")
diff --git a/detekt.yml b/detekt.yml
index 26af6de1..658f1b3b 100644
--- a/detekt.yml
+++ b/detekt.yml
@@ -3,6 +3,7 @@ build:
   weights:
     Indentation: 0
     MagicNumber: 0
+    InjectDispatcher: 0
 
 style:
   ClassOrdering:
diff --git a/src/main/kotlin/dev/usbharu/hideout/config/AwsConfig.kt b/src/main/kotlin/dev/usbharu/hideout/config/AwsConfig.kt
new file mode 100644
index 00000000..b697bb61
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/config/AwsConfig.kt
@@ -0,0 +1,20 @@
+package dev.usbharu.hideout.config
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import software.amazon.awssdk.auth.credentials.AwsBasicCredentials
+import software.amazon.awssdk.regions.Region
+import software.amazon.awssdk.services.s3.S3Client
+import java.net.URI
+
+@Configuration
+class AwsConfig {
+    @Bean
+    fun s3Client(awsConfig: StorageConfig): S3Client {
+        return S3Client.builder()
+            .endpointOverride(URI.create(awsConfig.endpoint))
+            .region(Region.of(awsConfig.region))
+            .credentialsProvider { AwsBasicCredentials.create(awsConfig.accessKey, awsConfig.secretKey) }
+            .build()
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/config/SpringConfig.kt b/src/main/kotlin/dev/usbharu/hideout/config/SpringConfig.kt
index 05d0c019..25ef84ed 100644
--- a/src/main/kotlin/dev/usbharu/hideout/config/SpringConfig.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/config/SpringConfig.kt
@@ -10,9 +10,23 @@ class SpringConfig {
 
     @Autowired
     lateinit var config: ApplicationConfig
+
+    @Autowired
+    lateinit var storageConfig: StorageConfig
 }
 
 @ConfigurationProperties("hideout")
 data class ApplicationConfig(
     val url: URL
 )
+
+@ConfigurationProperties("hideout.storage")
+data class StorageConfig(
+    val useS3: Boolean,
+    val endpoint: String,
+    val publicUrl: String,
+    val bucket: String,
+    val region: String,
+    val accessKey: String,
+    val secretKey: String
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
new file mode 100644
index 00000000..e357e2cc
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
@@ -0,0 +1,31 @@
+package dev.usbharu.hideout.controller.mastodon
+
+import dev.usbharu.hideout.controller.mastodon.generated.MediaApi
+import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import dev.usbharu.hideout.service.api.mastodon.MediaApiService
+import kotlinx.coroutines.runBlocking
+import org.springframework.http.ResponseEntity
+import org.springframework.stereotype.Controller
+import org.springframework.web.multipart.MultipartFile
+
+@Controller
+class MastodonMediaApiController(private val mediaApiService: MediaApiService) : MediaApi {
+    override fun apiV1MediaPost(
+        file: MultipartFile,
+        thumbnail: MultipartFile?,
+        description: String?,
+        focus: String?
+    ): ResponseEntity<MediaAttachment> = runBlocking {
+        ResponseEntity.ok(
+            mediaApiService.postMedia(
+                Media(
+                    file,
+                    thumbnail,
+                    description,
+                    focus
+                )
+            )
+        )
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/MediaSave.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/MediaSave.kt
new file mode 100644
index 00000000..0a32a8e3
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/MediaSave.kt
@@ -0,0 +1,8 @@
+package dev.usbharu.hideout.domain.model
+
+data class MediaSave(
+    val name: String,
+    val prefix: String,
+    val fileInputStream: ByteArray,
+    val thumbnailInputStream: ByteArray?
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/FileType.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/FileType.kt
new file mode 100644
index 00000000..a72ac82a
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/FileType.kt
@@ -0,0 +1,8 @@
+package dev.usbharu.hideout.domain.model.hideout.dto
+
+enum class FileType {
+    Image,
+    Video,
+    Audio,
+    Unknown
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/ProcessedFile.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/ProcessedFile.kt
new file mode 100644
index 00000000..1bf60d6c
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/ProcessedFile.kt
@@ -0,0 +1,6 @@
+package dev.usbharu.hideout.domain.model.hideout.dto
+
+data class ProcessedFile(
+    val byteArray: ByteArray,
+    val extension: String
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/ProcessedMedia.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/ProcessedMedia.kt
new file mode 100644
index 00000000..b11416e8
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/ProcessedMedia.kt
@@ -0,0 +1,6 @@
+package dev.usbharu.hideout.domain.model.hideout.dto
+
+data class ProcessedMedia(
+    val file: ProcessedFile,
+    val thumbnail: ProcessedFile?
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteMedia.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteMedia.kt
new file mode 100644
index 00000000..d4428ad1
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteMedia.kt
@@ -0,0 +1,7 @@
+package dev.usbharu.hideout.domain.model.hideout.dto
+
+data class RemoteMedia(
+    val name: String,
+    val url: String,
+    val mediaType: String
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/SavedMedia.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/SavedMedia.kt
new file mode 100644
index 00000000..b8ab7490
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/SavedMedia.kt
@@ -0,0 +1,16 @@
+package dev.usbharu.hideout.domain.model.hideout.dto
+
+sealed class SavedMedia(val success: Boolean)
+
+class SuccessSavedMedia(
+    val name: String,
+    val url: String,
+    val thumbnailUrl: String,
+) :
+    SavedMedia(true)
+
+class FaildSavedMedia(
+    val reason: String,
+    val description: String,
+    val trace: Throwable? = null
+) : SavedMedia(false)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/Media.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/Media.kt
new file mode 100644
index 00000000..042388b7
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/Media.kt
@@ -0,0 +1,13 @@
+package dev.usbharu.hideout.domain.model.hideout.entity
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+
+data class Media(
+    val id: Long,
+    val name: String,
+    val url: String,
+    val remoteUrl: String?,
+    val thumbnailUrl: String?,
+    val type: FileType,
+    val blurHash: String?
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Media.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Media.kt
new file mode 100644
index 00000000..978eaa56
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Media.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.domain.model.hideout.form
+
+import org.springframework.web.multipart.MultipartFile
+
+data class Media(
+    val file: MultipartFile,
+    val thumbnail: MultipartFile?,
+    val description: String?,
+    val focus: String?
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaConvertException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaConvertException.kt
new file mode 100644
index 00000000..1082f080
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaConvertException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+open class MediaConvertException : MediaException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaException.kt
new file mode 100644
index 00000000..922a42a8
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+abstract class MediaException : RuntimeException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaFileSizeException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaFileSizeException.kt
new file mode 100644
index 00000000..f7bd6536
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaFileSizeException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+open class MediaFileSizeException : MediaException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaFileSizeIsZeroException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaFileSizeIsZeroException.kt
new file mode 100644
index 00000000..523f94b0
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaFileSizeIsZeroException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+class MediaFileSizeIsZeroException : MediaFileSizeException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaSaveException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaSaveException.kt
new file mode 100644
index 00000000..8887a3fe
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaSaveException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+open class MediaSaveException : MediaException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/UnsupportedMediaException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/UnsupportedMediaException.kt
new file mode 100644
index 00000000..2fd8fc23
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/UnsupportedMediaException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+class UnsupportedMediaException : MediaException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepository.kt b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepository.kt
new file mode 100644
index 00000000..be55bb86
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepository.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.repository
+
+import dev.usbharu.hideout.domain.model.hideout.entity.Media
+
+interface MediaRepository {
+    suspend fun generateId(): Long
+    suspend fun save(media: Media): Media
+    suspend fun findById(id: Long): Media
+    suspend fun delete(id: Long)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepositoryImpl.kt
new file mode 100644
index 00000000..610d3e5a
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepositoryImpl.kt
@@ -0,0 +1,80 @@
+package dev.usbharu.hideout.repository
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
+import dev.usbharu.hideout.service.core.IdGenerateService
+import dev.usbharu.hideout.util.singleOr
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
+import org.springframework.stereotype.Repository
+import dev.usbharu.hideout.domain.model.hideout.entity.Media as EntityMedia
+
+@Repository
+class MediaRepositoryImpl(private val idGenerateService: IdGenerateService) : MediaRepository {
+    override suspend fun generateId(): Long = idGenerateService.generateId()
+
+    override suspend fun save(media: EntityMedia): EntityMedia {
+        if (Media.select {
+                Media.id eq media.id
+            }.singleOrNull() != null
+        ) {
+            Media.update({ Media.id eq media.id }) {
+                it[Media.name] = media.name
+                it[Media.url] = media.url
+                it[Media.remoteUrl] = media.remoteUrl
+                it[Media.thumbnailUrl] = media.thumbnailUrl
+                it[Media.type] = media.type.ordinal
+                it[Media.blurhash] = media.blurHash
+            }
+        } else {
+            Media.insert {
+                it[Media.id] = media.id
+                it[Media.name] = media.name
+                it[Media.url] = media.url
+                it[Media.remoteUrl] = media.remoteUrl
+                it[Media.thumbnailUrl] = media.thumbnailUrl
+                it[Media.type] = media.type.ordinal
+                it[Media.blurhash] = media.blurHash
+            }
+        }
+        return media
+    }
+
+    override suspend fun findById(id: Long): EntityMedia {
+        return Media
+            .select {
+                Media.id eq id
+            }
+            .singleOr {
+                FailedToGetResourcesException("id: $id was not found.")
+            }.toMedia()
+    }
+
+    override suspend fun delete(id: Long) {
+        Media.deleteWhere {
+            Media.id eq id
+        }
+    }
+
+    fun ResultRow.toMedia(): EntityMedia {
+        return EntityMedia(
+            id = this[Media.id],
+            name = this[Media.name],
+            url = this[Media.url],
+            remoteUrl = this[Media.remoteUrl],
+            thumbnailUrl = this[Media.thumbnailUrl],
+            type = FileType.values().first { it.ordinal == this[Media.type] },
+            blurHash = this[Media.blurhash],
+        )
+    }
+}
+
+object Media : Table("media") {
+    val id = long("id")
+    val name = varchar("name", 255)
+    val url = varchar("url", 255)
+    val remoteUrl = varchar("remote_url", 255).nullable()
+    val thumbnailUrl = varchar("thumbnail_url", 255).nullable()
+    val type = integer("type")
+    val blurhash = varchar("blurhash", 255).nullable()
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt
index 866feaf3..34789884 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt
@@ -12,7 +12,6 @@ class ReactionRepositoryImpl(
     private val idGenerateService: IdGenerateService
 ) : ReactionRepository {
 
-
     override suspend fun generateId(): Long = idGenerateService.generateId()
 
     override suspend fun save(reaction: Reaction): Reaction {
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiService.kt b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiService.kt
new file mode 100644
index 00000000..8b1da1b9
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiService.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.service.api.mastodon
+
+import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import org.springframework.stereotype.Service
+
+@Service
+interface MediaApiService {
+    suspend fun postMedia(media: Media): MediaAttachment
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiServiceImpl.kt
new file mode 100644
index 00000000..ab4d07de
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiServiceImpl.kt
@@ -0,0 +1,35 @@
+package dev.usbharu.hideout.service.api.mastodon
+
+import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import dev.usbharu.hideout.service.core.Transaction
+import dev.usbharu.hideout.service.media.MediaService
+import org.springframework.stereotype.Service
+
+@Service
+class MediaApiServiceImpl(private val mediaService: MediaService, private val transaction: Transaction) :
+    MediaApiService {
+
+    override suspend fun postMedia(media: Media): MediaAttachment {
+        return transaction.transaction {
+            val uploadLocalMedia = mediaService.uploadLocalMedia(media)
+            val type = when (uploadLocalMedia.type) {
+                FileType.Image -> MediaAttachment.Type.image
+                FileType.Video -> MediaAttachment.Type.video
+                FileType.Audio -> MediaAttachment.Type.audio
+                FileType.Unknown -> MediaAttachment.Type.unknown
+            }
+            return@transaction MediaAttachment(
+                id = uploadLocalMedia.id.toString(),
+                type = type,
+                url = uploadLocalMedia.url,
+                previewUrl = uploadLocalMedia.thumbnailUrl,
+                remoteUrl = null,
+                description = media.description,
+                blurhash = uploadLocalMedia.blurHash,
+                textUrl = uploadLocalMedia.url
+            )
+        }
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationService.kt
new file mode 100644
index 00000000..5849feea
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationService.kt
@@ -0,0 +1,7 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+
+interface FileTypeDeterminationService {
+    fun fileType(byteArray: ByteArray, filename: String, contentType: String?): FileType
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationServiceImpl.kt
new file mode 100644
index 00000000..a13ebf66
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationServiceImpl.kt
@@ -0,0 +1,27 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import org.springframework.stereotype.Component
+
+@Component
+class FileTypeDeterminationServiceImpl : FileTypeDeterminationService {
+    override fun fileType(
+        byteArray: ByteArray,
+        filename: String,
+        contentType: String?
+    ): FileType {
+        if (contentType == null) {
+            return FileType.Unknown
+        }
+        if (contentType.startsWith("image")) {
+            return FileType.Image
+        }
+        if (contentType.startsWith("video")) {
+            return FileType.Video
+        }
+        if (contentType.startsWith("audio")) {
+            return FileType.Audio
+        }
+        return FileType.Unknown
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashService.kt
new file mode 100644
index 00000000..490a2ffe
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashService.kt
@@ -0,0 +1,7 @@
+package dev.usbharu.hideout.service.media
+
+import java.awt.image.BufferedImage
+
+interface MediaBlurhashService {
+    fun generateBlurhash(bufferedImage: BufferedImage): String
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashServiceImpl.kt
new file mode 100644
index 00000000..d2156796
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashServiceImpl.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.service.media
+
+import io.trbl.blurhash.BlurHash
+import org.springframework.stereotype.Service
+import java.awt.image.BufferedImage
+
+@Service
+class MediaBlurhashServiceImpl : MediaBlurhashService {
+    override fun generateBlurhash(bufferedImage: BufferedImage): String = BlurHash.encode(bufferedImage)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaDataStore.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaDataStore.kt
new file mode 100644
index 00000000..bd03f704
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaDataStore.kt
@@ -0,0 +1,9 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.MediaSave
+import dev.usbharu.hideout.domain.model.hideout.dto.SavedMedia
+
+interface MediaDataStore {
+    suspend fun save(dataMediaSave: MediaSave): SavedMedia
+    suspend fun delete(id: String)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaService.kt
new file mode 100644
index 00000000..025b22ad
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaService.kt
@@ -0,0 +1,9 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.hideout.dto.RemoteMedia
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+
+interface MediaService {
+    suspend fun uploadLocalMedia(media: Media): dev.usbharu.hideout.domain.model.hideout.entity.Media
+    suspend fun uploadRemoteMedia(remoteMedia: RemoteMedia)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaServiceImpl.kt
new file mode 100644
index 00000000..313bb8e1
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaServiceImpl.kt
@@ -0,0 +1,95 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.MediaSave
+import dev.usbharu.hideout.domain.model.hideout.dto.FaildSavedMedia
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.dto.RemoteMedia
+import dev.usbharu.hideout.domain.model.hideout.dto.SuccessSavedMedia
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import dev.usbharu.hideout.exception.media.MediaFileSizeIsZeroException
+import dev.usbharu.hideout.exception.media.MediaSaveException
+import dev.usbharu.hideout.exception.media.UnsupportedMediaException
+import dev.usbharu.hideout.repository.MediaRepository
+import dev.usbharu.hideout.service.media.converter.MediaProcessService
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+import java.util.*
+import javax.imageio.ImageIO
+import dev.usbharu.hideout.domain.model.hideout.entity.Media as EntityMedia
+
+@Service
+class MediaServiceImpl(
+    private val mediaDataStore: MediaDataStore,
+    private val fileTypeDeterminationService: FileTypeDeterminationService,
+    private val mediaBlurhashService: MediaBlurhashService,
+    private val mediaRepository: MediaRepository,
+    private val mediaProcessService: MediaProcessService
+) : MediaService {
+    override suspend fun uploadLocalMedia(media: Media): EntityMedia {
+        logger.info(
+            "Media upload. filename:${media.file.name} size:${media.file.size} contentType:${media.file.contentType}"
+        )
+
+        if (media.file.size == 0L) {
+            throw MediaFileSizeIsZeroException("Media file size is zero.")
+        }
+
+        val fileType = fileTypeDeterminationService.fileType(media.file.bytes, media.file.name, media.file.contentType)
+        if (fileType != FileType.Image) {
+            throw UnsupportedMediaException("FileType: $fileType  is not supported.")
+        }
+
+        val process = mediaProcessService.process(
+            fileType,
+            media.file.contentType.orEmpty(),
+            media.file.name,
+            media.file.bytes,
+            media.thumbnail?.bytes
+        )
+
+        val dataMediaSave = MediaSave(
+            "${UUID.randomUUID()}.${process.file.extension}",
+            "",
+            process.file.byteArray,
+            process.thumbnail?.byteArray
+        )
+        val save = try {
+            mediaDataStore.save(dataMediaSave)
+        } catch (e: Exception) {
+            logger.warn("Failed save media", e)
+            throw MediaSaveException("Failed save media.", e)
+        }
+
+        if (save.success.not()) {
+            save as FaildSavedMedia
+            logger.warn("Failed save media. reason: ${save.reason}")
+            logger.warn(save.description, save.trace)
+            throw MediaSaveException("Failed save media.")
+        }
+        save as SuccessSavedMedia
+
+        val blurHash = withContext(Dispatchers.IO) {
+            mediaBlurhashService.generateBlurhash(ImageIO.read(media.file.bytes.inputStream()))
+        }
+
+        return mediaRepository.save(
+            EntityMedia(
+                id = mediaRepository.generateId(),
+                name = media.file.name,
+                url = save.url,
+                remoteUrl = null,
+                thumbnailUrl = save.thumbnailUrl,
+                type = fileType,
+                blurHash = blurHash
+            )
+        )
+    }
+
+    override suspend fun uploadRemoteMedia(remoteMedia: RemoteMedia) = Unit
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(MediaServiceImpl::class.java)
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/S3MediaDataStore.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/S3MediaDataStore.kt
new file mode 100644
index 00000000..a10482f5
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/S3MediaDataStore.kt
@@ -0,0 +1,67 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.config.StorageConfig
+import dev.usbharu.hideout.domain.model.MediaSave
+import dev.usbharu.hideout.domain.model.hideout.dto.SavedMedia
+import dev.usbharu.hideout.domain.model.hideout.dto.SuccessSavedMedia
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.withContext
+import org.springframework.stereotype.Service
+import software.amazon.awssdk.core.sync.RequestBody
+import software.amazon.awssdk.services.s3.S3Client
+import software.amazon.awssdk.services.s3.model.DeleteObjectRequest
+import software.amazon.awssdk.services.s3.model.GetUrlRequest
+import software.amazon.awssdk.services.s3.model.PutObjectRequest
+
+@Service
+class S3MediaDataStore(private val s3Client: S3Client, private val storageConfig: StorageConfig) : MediaDataStore {
+    override suspend fun save(dataMediaSave: MediaSave): SavedMedia {
+        val fileUploadRequest = PutObjectRequest.builder()
+            .bucket(storageConfig.bucket)
+            .key(dataMediaSave.name)
+            .build()
+
+        val thumbnailKey = "thumbnail-${dataMediaSave.name}"
+        val thumbnailUploadRequest = PutObjectRequest.builder()
+            .bucket(storageConfig.bucket)
+            .key(thumbnailKey)
+            .build()
+
+        val pairList = withContext(Dispatchers.IO) {
+            awaitAll(
+                async {
+                    if (dataMediaSave.thumbnailInputStream != null) {
+                        s3Client.putObject(
+                            thumbnailUploadRequest,
+                            RequestBody.fromBytes(dataMediaSave.thumbnailInputStream)
+                        )
+                        "thumbnail" to s3Client.utilities()
+                            .getUrl(GetUrlRequest.builder().bucket(storageConfig.bucket).key(thumbnailKey).build())
+                    } else {
+                        "thumbnail" to null
+                    }
+                },
+                async {
+                    s3Client.putObject(fileUploadRequest, RequestBody.fromBytes(dataMediaSave.fileInputStream))
+                    "file" to s3Client.utilities()
+                        .getUrl(GetUrlRequest.builder().bucket(storageConfig.bucket).key(dataMediaSave.name).build())
+                }
+            )
+        }.toMap()
+        return SuccessSavedMedia(
+            dataMediaSave.name,
+            pairList.getValue("file").toString(),
+            pairList.getValue("thumbnail").toString()
+        )
+    }
+
+    override suspend fun delete(id: String) {
+        val fileDeleteRequest = DeleteObjectRequest.builder().bucket(storageConfig.bucket).key(id).build()
+        val thumbnailDeleteRequest =
+            DeleteObjectRequest.builder().bucket(storageConfig.bucket).key("thumbnail-$id").build()
+        s3Client.deleteObject(fileDeleteRequest)
+        s3Client.deleteObject(thumbnailDeleteRequest)
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/ThumbnailGenerateService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/ThumbnailGenerateService.kt
new file mode 100644
index 00000000..cb8438d6
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/ThumbnailGenerateService.kt
@@ -0,0 +1,9 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedFile
+import java.io.InputStream
+
+interface ThumbnailGenerateService {
+    fun generate(bufferedImage: InputStream, width: Int, height: Int): ProcessedFile?
+    fun generate(outputStream: ByteArray, width: Int, height: Int): ProcessedFile?
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/ThumbnailGenerateServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/ThumbnailGenerateServiceImpl.kt
new file mode 100644
index 00000000..7f736de5
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/ThumbnailGenerateServiceImpl.kt
@@ -0,0 +1,27 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedFile
+import org.springframework.stereotype.Service
+import java.awt.image.BufferedImage
+import java.io.ByteArrayOutputStream
+import java.io.InputStream
+import javax.imageio.ImageIO
+
+@Service
+class ThumbnailGenerateServiceImpl : ThumbnailGenerateService {
+    override fun generate(bufferedImage: InputStream, width: Int, height: Int): ProcessedFile? {
+        val image = ImageIO.read(bufferedImage)
+        return internalGenerate(image)
+    }
+
+    override fun generate(outputStream: ByteArray, width: Int, height: Int): ProcessedFile? {
+        val image = ImageIO.read(outputStream.inputStream())
+        return internalGenerate(image)
+    }
+
+    private fun internalGenerate(image: BufferedImage): ProcessedFile {
+        val byteArrayOutputStream = ByteArrayOutputStream()
+        ImageIO.write(image, "jpeg", byteArrayOutputStream)
+        return ProcessedFile(byteArrayOutputStream.toByteArray(), "jpg")
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverter.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverter.kt
new file mode 100644
index 00000000..0829ac46
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverter.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.service.media.converter
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedFile
+import java.io.InputStream
+
+interface MediaConverter {
+    fun isSupport(fileType: FileType): Boolean
+    fun convert(inputStream: InputStream): ProcessedFile
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverterRoot.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverterRoot.kt
new file mode 100644
index 00000000..4965da2a
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverterRoot.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.service.media.converter
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedFile
+import java.io.InputStream
+
+interface MediaConverterRoot {
+    suspend fun convert(
+        fileType: FileType,
+        contentType: String,
+        filename: String,
+        inputStream: InputStream
+    ): ProcessedFile
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverterRootImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverterRootImpl.kt
new file mode 100644
index 00000000..4d340bef
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaConverterRootImpl.kt
@@ -0,0 +1,32 @@
+package dev.usbharu.hideout.service.media.converter
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedFile
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.springframework.stereotype.Service
+import java.io.InputStream
+
+@Service
+class MediaConverterRootImpl(private val converters: List<MediaConverter>) : MediaConverterRoot {
+    override suspend fun convert(
+        fileType: FileType,
+        contentType: String,
+        filename: String,
+        inputStream: InputStream
+    ): ProcessedFile {
+        val convert = converters.find {
+            it.isSupport(fileType)
+        }?.convert(inputStream)
+        if (convert != null) {
+            return convert
+        }
+        return withContext(Dispatchers.IO) {
+            if (filename.contains('.')) {
+                ProcessedFile(inputStream.readAllBytes(), filename.substringAfterLast("."))
+            } else {
+                ProcessedFile(inputStream.readAllBytes(), contentType.substringAfterLast("/"))
+            }
+        }
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaProcessService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaProcessService.kt
new file mode 100644
index 00000000..5df2c16a
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaProcessService.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.service.media.converter
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedMedia
+
+interface MediaProcessService {
+    suspend fun process(
+        fileType: FileType,
+        contentType: String,
+        fileName: String,
+        file: ByteArray,
+        thumbnail: ByteArray?
+    ): ProcessedMedia
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaProcessServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaProcessServiceImpl.kt
new file mode 100644
index 00000000..c32688d5
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/converter/MediaProcessServiceImpl.kt
@@ -0,0 +1,47 @@
+package dev.usbharu.hideout.service.media.converter
+
+import dev.usbharu.hideout.domain.model.hideout.dto.FileType
+import dev.usbharu.hideout.domain.model.hideout.dto.ProcessedMedia
+import dev.usbharu.hideout.exception.media.MediaConvertException
+import dev.usbharu.hideout.service.media.ThumbnailGenerateService
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+
+@Service
+class MediaProcessServiceImpl(
+    private val mediaConverterRoot: MediaConverterRoot,
+    private val thumbnailGenerateService: ThumbnailGenerateService
+) : MediaProcessService {
+    override suspend fun process(
+        fileType: FileType,
+        contentType: String,
+        filename: String,
+        file: ByteArray,
+        thumbnail: ByteArray?
+    ): ProcessedMedia {
+        val fileInputStream = try {
+            mediaConverterRoot.convert(fileType, contentType, filename, file.inputStream().buffered())
+        } catch (e: Exception) {
+            logger.warn("Failed convert media.", e)
+            throw MediaConvertException("Failed convert media.", e)
+        }
+        val thumbnailInputStream = try {
+            thumbnail?.let { mediaConverterRoot.convert(fileType, contentType, filename, it.inputStream().buffered()) }
+        } catch (e: Exception) {
+            logger.warn("Failed convert thumbnail media.", e)
+            null
+        }
+        return ProcessedMedia(
+            fileInputStream,
+            thumbnailGenerateService.generate(
+                thumbnailInputStream?.byteArray ?: file,
+                2048,
+                2048
+            )
+        )
+    }
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(MediaProcessServiceImpl::class.java)
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 0c4a32a1..143486fb 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -7,6 +7,11 @@ hideout:
       key-id: a
       private-key: "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"
       public-key: "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu1SU1LfVLPHCozMxH2Mo4lgOEePzNm0tRgeLezV6ffAt0gunVTLw7onLRnrq0/IzW7yWR7QkrmBL7jTKEn5u+qKhbwKfBstIs+bMY2Zkp18gnTxKLxoS2tFczGkPLPgizskuemMghRniWaoLcyehkd3qqGElvW/VDL5AaWTg0nLVkjRo9z+40RQzuVaE8AkAFmxZzow3x+VJYKdjykkJ0iT9wCS0DRTXu269V264Vf/3jvredZiKRkgwlL9xNAwxXFg0x/XFw005UWVRIkdgcKWTjpBP2dPwVZ4WWC+9aGVd+Gyn1o0CLelf4rEjGoXbAAEgAqeGUxrcIlbjXfbcmwIDAQAB"
+
+
+
+
+
 spring:
   jackson:
     serialization:
diff --git a/src/main/resources/openapi/mastodon.yaml b/src/main/resources/openapi/mastodon.yaml
index 5464a28a..6f93fa36 100644
--- a/src/main/resources/openapi/mastodon.yaml
+++ b/src/main/resources/openapi/mastodon.yaml
@@ -17,6 +17,8 @@ tags:
     description: instance
   - name: timeline
     description: timeline
+  - name: media
+    description: media
 
 paths:
   /api/v2/instance:
@@ -291,9 +293,48 @@ paths:
                 type: array
                 items:
                   $ref: "#/components/schemas/Status"
+  /api/v1/media:
+    post:
+      tags:
+        - media
+      security:
+        - OAuth2:
+            - "write:media"
+      requestBody:
+        required: true
+        content:
+          multipart/form-data:
+            schema:
+              $ref: "#/components/schemas/V1MediaRequest"
+            encoding:
+              file:
+                contentType: image/jpeg, image/png
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/MediaAttachment"
 
 components:
   schemas:
+    V1MediaRequest:
+      type: object
+      properties:
+        file:
+          type: string
+          format: binary
+        thumbnail:
+          type: string
+          format: binary
+        description:
+          type: string
+        focus:
+          type: string
+      required:
+        - file
+
     AccountsCreateRequest:
       type: object
       properties: