Convert AVI to APNG Online

Convert AVI to APNG Online

Turn an AVI clip into an animated PNG (APNG) that loops in the browser with full RGBA transparency and lossless, pixel-exact frames — no 256-color GIF banding. Drop in an AVI, set the frame rate and output size, and download a self-contained .apng that falls back to a clean static first frame anywhere the format isn't recognized. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

How to Convert AVI to APNG

1. Upload Your AVI File: Drag and drop your .avi onto the page or click "Upload" to pick it from your device. AVI clips are often large or lightly compressed, so a short segment converts fastest.
2. Set Framerate: Open the options and choose a value from the FRAMERATE dropdown — 10 FPS (the recommended default) keeps the file small, while 20-30 FPS gives smoother motion at the cost of size. Every extra frame is stored losslessly, so framerate is the single biggest lever on output size.
3. Set Image Resolution and Colors: Use Image resolution (a percentage or a preset width/height) to shrink large AVI frames, and leave Colors on "Original" for true color or switch to "By Color Reduction + Dither" to trade some palette depth for a smaller file. Image quality (%) controls the Zopfli-backed compression effort.
4. Convert and Download: Click "Convert" and save your .apng. No sign-up, no watermark.

APNG vs GIF vs Animated WebP

Frequently Asked Questions

Why is my APNG larger than the original AVI or an equivalent GIF?

APNG is lossless, so it stores every pixel of every frame exactly — there is no quality-discarding step like the lossy codecs an AVI often uses. In our testing, the same short clip exported as APNG runs several times larger than an equivalent 256-color GIF, which is the expected trade for true color and clean alpha. To shrink the result, lower the FRAMERATE (10 FPS is usually plenty for a UI loop), reduce the resolution, or trim the clip to the few seconds you actually need. Switching Colors to "By Color Reduction + Dither" also cuts size by reducing palette depth.

Will the AVI's audio be included in the APNG?

No. APNG is an image format and carries no audio track. The conversion uses only the AVI's video frames, so any soundtrack is dropped. If you need sound, convert to a video format such as MP4 or WebM instead of an animated image.

What happens in a browser that doesn't support APNG?

An APNG begins with a valid standard PNG chunk, so any browser or image viewer that can't animate it simply displays the first frame as a static PNG. There is no broken-image icon — older clients just see a still picture. In practice Firefox, Chrome, Safari 8+, and Edge 79+ animate it, covering roughly 94-96% of browsers worldwide.

How long is my AVI file kept on your servers?

Your uploaded AVI and the generated APNG are processed server-side and deleted automatically a few hours after upload. The transfer uses an encrypted connection, nothing is shared or made public, and you don't need an account. The real practical limit for big AVI files is upload time, not processing — trimming or downscaling first speeds things up.

Should I use APNG or GIF for this clip?

Choose APNG when you need crisp gradients, soft shadows or glows, smooth alpha transparency, or photographic frames without GIF's 256-color banding — for example a logo loop or a UI micro-animation. Choose AVI to GIF when universal compatibility matters more than fidelity, since GIF plays everywhere. If your finished APNG is too heavy to share, run it through Compress APNG to squeeze it further.