Sprite Sheet Generator

Combine multiple images into a single sprite sheet PNG. Arrange in horizontal, vertical, or grid layout with custom spacing. Includes CSS preview.

Input (0)
Drop multiple images here or click to browseSupports: PNG, JPG, WEBP, GIF (at least 2 images)
Output
Sprite Sheet
🛡️Zero server logs. Sprite sheet generation runs 100% inside your browser via Web Workers. Your files never leave this tab.
🛠️Developer Tool Belt
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Sprite Sheet Generator

Sprite Sheet Generator combines multiple images into a single PNG sprite sheet. Arrange them horizontally, vertically, or in a grid with custom spacing.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Generate a Sprite Sheet

  1. Upload two or more images by dragging and dropping or clicking to browse.
  2. Choose a layout (horizontal, vertical, or grid) and adjust spacing.
  3. Click Generate to create your sprite sheet and get the CSS code.

Frequently Asked Questions

Got questions about sprite sheets? We've got answers.

What is a sprite sheet?

A sprite sheet is a single image file that contains multiple smaller images arranged in a grid. It's commonly used in web development to reduce HTTP requests.

How many images can I combine?

You can combine as many images as your browser can handle. For optimal performance, we recommend up to 100 images.

Is this tool safe to use?

Yes, 100%. All processing happens in your browser via Web Workers. Your images never leave your device.

Automated E2E Test Suite Logs

Our build systems validate edge-case processing under extreme conditions before each deployment.

Stability
100.0%
Passed
11/11
Env
V8-Sandbox
Engine: Vitest RunnerUpdated: 2026/6/13 02:40:10📦 Download Test Datasets
PASSPure Function Unit Tests should handle valid image input
PASSPure Function Unit Tests should reject invalid input
PASSPure Function Unit Tests should not mutate original input
PASSPure Function Unit Tests should handle boundary input
PASSSpriteSheetGeneratorTool should render Input and Output labels
PASSSpriteSheetGeneratorTool should call generate when button is clicked and files are set
PASSSpriteSheetGeneratorTool should disable button when isLoading is true
PASSSpriteSheetGeneratorTool should render privacy strip
PASSImage Worker — Sprite Sheet Actions should return success for valid sprite-sheet action
PASSImage Worker — Sprite Sheet Actions should return error for unknown action
PASSImage Worker — Sprite Sheet Actions should return error for invalid payload
⏱️ 0.18ms📦 1.5KB🎚️ Max Nesting: 3🌿 AST Nodes: 48🛡️ V8 Heap: Healthy
$ codecaven-validator --scope=tool● CLUSTER COMPLIANT

Tool Changelog & Updates

v1.1.02026-06-11
  • Feature: Added comprehensive Vitest test suite covering Tool rendering, worker operations, and shared operation logic — all 871 image tests passing.
  • Fix: Fixed OffscreenCanvas mock patterns in tests for proper constructor instantiation.
v1.0.02026-06-11
  • Feature: Initial release with sprite sheet generation — combine multiple images into a single PNG with horizontal, vertical, or grid layout.
  • UX: Multi-file upload with preview, configurable margin and padding between sprites.
  • UX: CSS preview output showing background-position for each sprite element.
  • Security: Web Worker isolation ensures zero data uploads — all processing stays in the browser.