Compress Animated PNG (APNG)
APNG stores every frame losslessly in full colour, so animations quickly reach several megabytes. Animated WebP keeps the frames, their timing, the loop count and alpha transparency, and is typically much smaller; every current browser plays it. Raise the quality for a result closer to the original.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
APNG, PNG expected · other image formats also work
How to use Compress APNG
- 1
Drop your images, choose files, or paste from the clipboard.
- 2
Adjust the options. The preview updates as you change them.
- 3
Click Compress. Files are processed on your device.
- 4
Download each result or everything as a ZIP.
Why use Aback Images for compress apng
Best-in-class encoders
MozJPEG for JPG, OxiPNG and palette quantisation for PNG, libwebp and libavif for WebP and AVIF, all compiled to WebAssembly.
Live before/after
See the result and its file size on your actual image before processing the batch.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
Never bigger than the original
If compression cannot beat your file, the original is returned unchanged with a note.
Related tools
Shrink animated GIFs by reducing colours, dropping frames and resizing, while keeping the animation.
Convert GIF to WebP in your browser, with the animation kept frame for frame. Batch, private, no uploads.
Split GIF, animated WebP or APNG into individual PNG, JPG or WebP frames, zipped.
Convert APNG to GIF in your browser, with the animation kept frame for frame. Batch, private, no uploads.
Shrink JPG, PNG, WebP, AVIF and GIF files with MozJPEG, OxiPNG and modern codecs, with a live before/after preview.
Make JPEG photos smaller with MozJPEG, the encoder that beats standard JPEG by 10-15% at the same quality.
Cut PNG size by up to 80% with smart palette reduction and OxiPNG lossless optimisation, keeping transparency.
Re-encode WebP images smaller with libwebp's best settings, including animated WebP.
Frequently asked questions
Is the animation kept?
Yes. Every frame, its delay and the loop count are carried over into the animated WebP.
Where can I use animated WebP?
Every current browser plays it, and WhatsApp's animated stickers use it. A few chat apps and older editors only play APNG or GIF; keep the original for those.
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.