Sprite Sheet Generator
Pack images into a sprite sheet with CSS classes and JSON coordinates. Free, private and instant: it runs entirely in your browser.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
How to use Sprite Sheet
- 1
Open or drop an image.
- 2
Use the controls to get the result you want.
- 3
Download the result. Nothing is uploaded at any point.
Why use Aback Images for sprite sheet
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
Instant results
Everything runs locally in a background thread, so there is no upload queue and no waiting on a server.
Batch friendly
Process many images at once and download them individually or as a ZIP.
Every format
Works with JPG, PNG, WebP, AVIF, HEIC, GIF, TIFF, SVG, RAW and more, identified by content rather than file name.
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Frequently asked questions
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.