diff --git a/locales/index.d.ts b/locales/index.d.ts
index a316930c7e..0343c4ae99 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -12168,6 +12168,10 @@ export interface Locale extends ILocale {
              * 点グリッド
              */
             "dottedGrid": string;
+            /**
+             * チェッカー
+             */
+            "checker": string;
         };
     };
 }
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 59d15cb51a..d5f58010fe 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -3260,3 +3260,4 @@ _imageEffector:
     zoomLines: "集中線"
     stripe: "ストライプ"
     dottedGrid: "点グリッド"
+    checker: "チェッカー"
diff --git a/packages/frontend/src/utility/image-effector/fxs.ts b/packages/frontend/src/utility/image-effector/fxs.ts
index d17684d11e..a113ec3b2e 100644
--- a/packages/frontend/src/utility/image-effector/fxs.ts
+++ b/packages/frontend/src/utility/image-effector/fxs.ts
@@ -3,6 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
+import { FX_checker } from './fxs/checker.js';
 import { FX_chromaticAberration } from './fxs/chromaticAberration.js';
 import { FX_colorClamp } from './fxs/colorClamp.js';
 import { FX_colorClampAdvanced } from './fxs/colorClampAdvanced.js';
@@ -32,4 +33,5 @@ export const FXS = [
 	FX_zoomLines,
 	FX_stripe,
 	FX_dottedGrid,
+	FX_checker,
 ] as const satisfies ImageEffectorFx<string, any>[];
diff --git a/packages/frontend/src/utility/image-effector/fxs/checker.ts b/packages/frontend/src/utility/image-effector/fxs/checker.ts
new file mode 100644
index 0000000000..d79c31c292
--- /dev/null
+++ b/packages/frontend/src/utility/image-effector/fxs/checker.ts
@@ -0,0 +1,87 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineImageEffectorFx } from '../ImageEffector.js';
+import { i18n } from '@/i18n.js';
+
+const shader = `#version 300 es
+precision mediump float;
+
+const float PI = 3.141592653589793;
+const float TWO_PI = 6.283185307179586;
+const float HALF_PI = 1.5707963267948966;
+
+in vec2 in_uv;
+uniform sampler2D in_texture;
+uniform vec2 in_resolution;
+uniform float u_angle;
+uniform float u_scale;
+uniform bool u_black;
+uniform float u_opacity;
+out vec4 out_color;
+
+void main() {
+	vec4 in_color = texture(in_texture, in_uv);
+	float x_ratio = max(in_resolution.x / in_resolution.y, 1.0);
+	float y_ratio = max(in_resolution.y / in_resolution.x, 1.0);
+
+	float angle = -(u_angle * PI);
+	vec2 centeredUv = (in_uv - vec2(0.5, 0.5)) * vec2(x_ratio, y_ratio);
+	vec2 rotatedUV = vec2(
+		centeredUv.x * cos(angle) - centeredUv.y * sin(angle),
+		centeredUv.x * sin(angle) + centeredUv.y * cos(angle)
+	);
+
+	float fmodResult = mod(floor(u_scale * rotatedUV.x) + floor(u_scale * rotatedUV.y), 2.0);
+	float fin = max(sign(fmodResult), 0.0);
+
+	out_color = vec4(
+		mix(in_color.r, u_black ? 0.0 : 1.0, fin * u_opacity),
+		mix(in_color.g, u_black ? 0.0 : 1.0, fin * u_opacity),
+		mix(in_color.b, u_black ? 0.0 : 1.0, fin * u_opacity),
+		in_color.a
+	);
+}
+`;
+
+export const FX_checker = defineImageEffectorFx({
+	id: 'checker' as const,
+	name: i18n.ts._imageEffector._fxs.checker,
+	shader,
+	uniforms: ['angle', 'scale', 'black', 'opacity'] as const,
+	params: {
+		angle: {
+			type: 'number' as const,
+			default: 0,
+			min: -1.0,
+			max: 1.0,
+			step: 0.01,
+		},
+		scale: {
+			type: 'number' as const,
+			default: 3.0,
+			min: 1.0,
+			max: 10.0,
+			step: 0.1,
+		},
+		black: {
+			type: 'boolean' as const,
+			default: false,
+		},
+		opacity: {
+			type: 'number' as const,
+			default: 0.5,
+			min: 0.0,
+			max: 1.0,
+			step: 0.01,
+		},
+	},
+	main: ({ gl, u, params }) => {
+		gl.uniform1f(u.angle, params.angle / 2);
+		gl.uniform1f(u.scale, params.scale * params.scale);
+		gl.uniform1i(u.black, params.black ? 1 : 0);
+		gl.uniform1f(u.opacity, params.opacity);
+	},
+});