SpritePilot is a free online sprite sheet generator and cutter that runs entirely in your browser. It uses WebAssembly-powered OpenCV to automatically detect and extract sprites from sprite sheets, pack multiple images into texture atlases, preview animations, and export game-engine-ready files — with no upload and no account required.

Is SpritePilot a free TexturePacker alternative?

Yes. SpritePilot is a free browser-based alternative to TexturePacker. It exports the same TexturePacker JSON format that Unity, Phaser, Cocos2d, and other engines import natively. Unlike TexturePacker, SpritePilot runs entirely in your browser at no cost and requires no installation.

How do I split a sprite sheet into individual sprites?

Upload your sprite sheet in the Sprite Detection section, then click Detect Sprites. SpritePilot will automatically find and extract each sprite using alpha-channel analysis. For sprite sheets with a uniform grid layout, use Grid Slice mode instead — just enter the number of columns and rows.

How do I import SpritePilot exports into Unity?

Export your sprite sheet with the TexturePacker JSON metadata option selected. In Unity, import the PNG as a Sprite texture, set its Sprite Mode to Multiple, and use the Sprite Editor's built-in TexturePacker support to slice using the JSON file. The sprite names and frame positions will map automatically.

How do I import SpritePilot exports into Godot 4?

Export with Godot JSON metadata selected. In Godot 4, import the PNG as a texture, then use the JSON to create AtlasTexture resources or configure an AnimatedSprite2D node. SpritePilot's Godot JSON includes frame names and pixel-accurate region coordinates.

Does SpritePilot work for pixel art?

Yes. SpritePilot is specifically optimized for pixel art sprite sheets. The Sprite Sheet Player uses integer scaling so pixel art stays sharp at any preview size. The alpha detection correctly handles partially transparent edges common in pixel art, and all canvas operations use nearest-neighbor rendering to avoid blurry upscaling.

What is the difference between Alpha Detection and Grid Slice?

Alpha Detection uses OpenCV.js flood-fill to automatically find sprites by their transparent boundaries — ideal for sheets where sprites are different sizes or irregularly placed. Grid Slice cuts the image into a uniform N-column by M-row grid — ideal for sprite sheets where every frame is exactly the same size, such as character walk cycles or tile sets.

Does SpritePilot upload my images to a server?

No. All image processing in SpritePilot happens locally in your browser using WebAssembly and the HTML5 Canvas API. Your images never leave your device, which means complete privacy and instant processing with no file size limits.

What export formats does SpritePilot support?

SpritePilot exports sprite sheets as PNG, WebP, or JPG. Metadata can be exported as TexturePacker JSON (Unity, Cocos2d), Phaser 3 atlas JSON, Godot JSON, Godot 4 SpriteFrames .tres, Aseprite-compatible JSON with animation tags, Basic JSON, or a CSS sprites stylesheet. Individual sprites can be downloaded as a ZIP archive with your custom filenames, and animations export as GIF or APNG.

Can I preview sprite animations in SpritePilot?

Yes. The Sprite Sheet Player lets you load any sprite sheet, set the frame grid, and play the animation at 1–60 FPS with loop or ping-pong modes. You can also step through frames one at a time and toggle between checker, black, and white backgrounds to check transparency.

How do I convert a GIF to a sprite sheet?

Open the GIF to Sprite Sheet converter, drop in your animated GIF, APNG, or animated WebP, and every frame is decoded in your browser and packed into a grid. Download the sheet as a PNG with JSON metadata, or send the frames to Export & Download to rename them, add animation tags, and export engine-specific formats.

How do I convert a sprite sheet to a GIF?

Open the Sprite Sheet to GIF converter, load your sheet, and set the number of columns and rows so each frame lines up. Preview the animation at your chosen FPS, then export as an animated GIF or as an APNG for lossless quality with full alpha transparency.

Can I make a sprite sheet from a video?

Yes. The Video to Sprite Sheet converter samples frames from an MP4 or WebM at the rate you choose and packs them into a grid. The video is processed entirely in your browser and never uploaded.

How do I remove a solid background from a sprite sheet?

Use the Background Removal tool: load the image, click the background color (or pick a corner), and adjust the tolerance slider until only the sprites remain. Download the transparent PNG or send it straight to Sprite Detection. This is ideal for older sprite sheets with magenta or white backgrounds.

SpritePilot – Free Online Sprite Sheet Generator

SpritePilot is a free, privacy-first sprite sheet tool that runs entirely in your browser. No upload, no account, no installation required. Powered by WebAssembly and OpenCV.js for instant, local image processing.

Tools

Sprite Detection — automatically extract individual sprites from any sprite sheet using alpha-channel flood-fill detection
Grid Slice — cut a uniform sprite sheet into equal frames by specifying columns and rows
Sprite Sheet Player — load any sprite sheet, set the frame grid, and preview the animation at 1–60 FPS with loop and ping-pong modes
Sprite Sheet to GIF — convert a sprite sheet animation into an animated GIF or lossless APNG
GIF to Sprite Sheet — decode every frame of a GIF, APNG, or animated WebP and pack them into a sheet
Video to Sprite Sheet — sample frames from an MP4 or WebM video into a sprite sheet
Background Removal — make solid magenta, white, or any flat background transparent with tolerance control
Bulk Sprite Sheets — pack multiple individual images into a single optimized texture atlas using bin-packing or grid algorithms
Advanced Processing — scale, sharpen, denoise, and batch-optimize sprites
Tile Map Editor — build tile-based game levels and export as JSON
Export & Download — export sheets with padding and edge-extrude options plus engine-ready metadata

Export Formats

TexturePacker JSON — the industry-standard hash format. Importable directly into Unity, Cocos2d, and most game engines
Phaser 3 atlas JSON — array-format atlas for Phaser's load.atlas
Godot JSON — region-based format for Godot 4 sprite and animation workflows
Godot SpriteFrames — ready-to-use .tres resource for AnimatedSprite2D
Aseprite JSON — frames plus animation frameTags, compatible with Aseprite importers
CSS Sprites — stylesheet with background-position classes for web use
GIF / APNG — animated exports straight from the Sprite Sheet Player
Basic JSON — generic sprite position metadata for custom pipelines
ZIP archive — download all sprites as individual files with your custom names

Why SpritePilot?

100% free — no subscription, no watermarks, no file size limits
Privacy-first — images never leave your device
Works offline after first load
Undo/redo for all sprite operations
Batch rename sprites before exporting
Integer-scaled canvas preview for crisp pixel art
Drag-and-drop image upload

Used by indie game developers, pixel artists, and hobbyists as a free alternative to TexturePacker for creating Unity sprite atlases, Godot sprite frames, and Phaser texture atlases.