Pack PNG frames into an optimized sprite sheet with JSON atlas support
Combine animation frames into a single, lightweight sprite sheet that imports cleanly into Unity, Godot, Unreal, Phaser, or Construct. Everything runs locally, with padding controls to prevent edge bleeding and a JSON manifest for instant engine mapping.
Local, private packing
Runs fully in your browser. No uploads, no asset size limits, zero vendor lock-in.
Grid + padding control
Switch between auto layout and fixed columns to remove texture bleeding in game engines.
JSON atlas export
Download a matching JSON manifest with frame positions for Unity, Godot, Unreal, or Phaser.
Built for production-ready sprite sheets
Skip desktop texture packers and command-line scripts. Drop in your PNG frames, preview the animation, then export a crisp atlas plus JSON metadata that your pipeline can read immediately.
- •Zero installs—runs in the browser while keeping assets private.
- •Padding controls prevent UV bleed on scaled sprites.
- •JSON export mirrors frame order for fast imports.
Sprite sheet packer
Upload your PNG sequence, pick auto layout or fixed columns, adjust padding, and export a ready-to-use sprite sheet plus JSON atlas without leaving the browser.
Drop PNG files here or click to select
Frames will be ordered by file name (ascending).
Auto grid tries to form a square layout. Fixed columns will add rows as needed.
Packing runs locally. Images are not uploaded or counted against credits.
No packed sheet yet
Upload frames and click Pack & Preview.
Purpose-built sprite sheet packer for game engines
Combine loose PNG frames into a clean sprite sheet with metadata that imports smoothly into Unity, Godot, Unreal, Phaser, Construct, and more.
Private, browser-based packing
All processing stays on-device. Keep unreleased sprites safe while you iterate quickly.
Flexible grid layouts
Auto-generate square atlases or lock in fixed columns when you need predictable UVs.
Padding that prevents bleed
Add per-frame padding to avoid color bleeding when mipmaps or compression kick in.
JSON manifest included
Export coordinates alongside the PNG so your loader or engine can map frames instantly.
Built-in animation preview
Check timing and alignment before downloading so you do not ship misaligned sprites.
Engine-ready output
PNG sprite sheets stay crisp for 2D, pixel-art, and HD pipelines across desktop and mobile.
How to pack a sprite sheet in under a minute
Follow this quick workflow to turn ordered PNG frames into an optimized sprite sheet without command-line tools.
Upload your PNG frames
Drag-and-drop sequential PNGs or click upload. We sort filenames automatically for you.
Choose layout & padding
Pick auto layout or a fixed column count, then add padding to avoid edge artifacts in engines.
Preview and export
Watch a live preview, confirm frame sizes, and download the packed PNG plus JSON atlas instantly.
Sprite sheet packing FAQ
Everything you need to know about turning loose PNGs into a single sprite sheet that imports cleanly into your game.
Is the sprite sheet packing process local?
Yes. The packer runs entirely in your browser, so frames never leave your machine. It is safe for unreleased characters and studio builds.
How do I avoid texture bleeding in my game engine?
Use the padding slider before exporting. Extra spacing around frames prevents bleeding once mipmaps or compression are applied in Unity, Unreal, Godot, or Phaser.
Can I keep my animation order?
Uploads are sorted automatically by filename, so frames stay in sequence. You can also set fixed columns for deterministic UV mapping.
Do I get JSON metadata with coordinates?
Yes. Export the PNG together with a JSON manifest that includes frame positions and sizes for quick ingestion into loaders or atlases.
What image formats work best?
Use PNG frames for lossless quality. You can also upload JPG or WEBP, but PNG keeps alpha channels intact for engine imports.
Ship faster
Pack, preview, and export sprite sheets without losing pixel-perfect quality.
Keep your pipeline simple: one browser-based tool to assemble atlases and export JSON metadata for any engine.