Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Home / Image / APNG Maker

Build an animated PNG from images or a clip, with full transparency and per-frame timing.

Free, no uploads, no sign-up. Runs 100% in your browser.

Frames are prepared in your browser and encoded with UPNG.js, which also optimises each frame so only changed areas are stored.

Input: JPG, PNG, WEBP, MP4, MOV, WEBM, MKV, AVI. Output: APNG.

Most image tools accept many files at once.
WebP and AVIF give much smaller files than JPG at the same visual quality.
Set a default image quality in Settings. Tools that do not choose their own quality use it.

Are my files uploaded?: No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?: Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?: Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Animated WebP Maker: Build an animated WebP from images or a video clip, with transparency, timing and loop control.
GIF Maker: Turn a set of images into an animated GIF.
Animated Image Converter: Convert between GIF, APNG, animated WebP and AVIF, and turn video clips into GIF, APNG or WebP.
Image Compressor: Shrink images in bulk with quality and width controls and live savings.