Sprite Sheet Generator
Combine images into sprite sheet with drag-to-reorder, grid layout, padding, scale modes. Export PNG/WebP/JPG with JSON atlas data for game engines and CSS sprites.
What is a sprite sheet and why use one?
A sprite sheet is a single image file containing multiple smaller images (sprites) arranged in a grid. Using sprite sheets reduces HTTP requests, improves page load performance, and makes game rendering more efficient by batching draw calls.
What image formats are supported?
You can upload PNG, JPG, GIF, SVG, and WebP images. The tool supports batch upload and clipboard paste (Ctrl+V) for quick workflow.
What export formats are available?
Export sprite sheets as PNG (with transparency), WebP (modern format with smaller file size), or JPG (best for photos without transparency). Choose based on your target platform requirements.
How do I reorder images in the sprite sheet?
Drag and drop image thumbnails to rearrange their position in the sprite sheet. You can also paste images directly from clipboard using Ctrl+V for fast iteration.
What is JSON atlas data and which engines support it?
JSON atlas data contains position, size, and frame information for each sprite. It's compatible with popular game engines like Phaser, PixiJS, Unity, Cocos2d, and many others for automatic sprite extraction.
What are the different scale modes?
Fit mode scales images to fit within the cell while maintaining aspect ratio. Fill mode scales to cover the entire cell and crops overflow. Stretch mode stretches images to fill the cell without maintaining aspect ratio.
Does the tool support transparency?
Yes, PNG and WebP exports preserve transparency from the original images. You can also set a custom background color for the sprite sheet, which is useful for JPG exports that don't support transparency.
How does padding affect the sprite sheet?
Padding adds space between individual sprites in the sheet, preventing visual bleeding when textures are sampled. This is especially important for game engines that use linear filtering or when sprites have transparent edges.
Can I use sprite sheets for CSS?
Yes, sprite sheets work great for CSS image sprites. The JSON atlas data can be used to generate CSS background-position rules, reducing HTTP requests and improving page load performance for icon sets and UI elements.
What are the best practices for sprite sheet dimensions?
Keep sprite sheet dimensions as powers of 2 (256x256, 512x512, 1024x1024) for optimal GPU texture handling. Most game engines prefer these dimensions for better performance and compatibility.
How do sprite sheets improve game performance?
Sprite sheets reduce draw calls by batching multiple sprites into a single texture. This minimizes GPU state changes, reduces memory overhead, and enables more efficient rendering, especially important for mobile games and web-based applications.
What is the difference between sprite sheets and texture atlases?
Sprite sheets typically arrange frames in a uniform grid, while texture atlases can pack irregularly shaped sprites more efficiently using algorithms like bin packing. This tool generates sprite sheets with grid-based layout for simplicity and compatibility.
How to Use Sprite Sheet Generator
Combine images into a single sprite sheet right in your browser. Drag to reorder frames, fine-tune the grid and padding, and export a PNG/WebP/JPG atlas with JSON data for game engines and CSS sprites. All processing is local.
- Add your images and use the + and − buttons to set the Columns and Rows of the grid.
- Set Padding (px) to create space between sprites and prevent texture bleeding.
- Leave Sprite Size on Auto to fit the largest frame, or type fixed dimensions for uniform cells.
- Pick a Scale Mode — Fit, Fill or Stretch — to control how each image sits inside its cell.
- Choose a Background of Transparent, White, Black or Custom, set the export Format to PNG, WebP or JPG, and name the file under Filename.
- Drag thumbnails to reorder frames — atlas coordinates update automatically — then export the sheet together with its JSON atlas.
Use at least 2 px of padding so neighboring sprites do not bleed into each other when textures are scaled or filtered in your engine.
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