Convert MKV to APNG Online

Convert MKV to APNG Online

Pull a short clip out of an MKV video and turn it into an APNG (animated PNG) — a lossless loop with full 24-bit color and 8-bit alpha transparency, so gradients stay smooth and there is none of GIF's 256-color banding. APNG is the right choice when fidelity matters more than file size: logos, stickers, UI demos, and high-detail anime or game clips where dithering would be visible. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public.

How to Convert MKV to APNG

1. Upload Your MKV File: Drag and drop your .mkv clip onto the page or click "Upload" to pick it from your computer, Google Drive, or Dropbox.
2. Set the Framerate: The default is 10 FPS, which keeps the file manageable; raise it toward 20-30 FPS for smoother motion and a larger output, or lower it for a lighter loop.
3. Tune Image Quality (%), Resolution, and Colors: Quality defaults to 80%; under Image Resolution you can resize or cap the dimensions, and under Colors you can keep the original palette or pick "By Color Reduction + Dither" to trade some color depth for a smaller file.
4. Convert and Download: Click "Convert" and download your APNG. No sign-up, no watermark.

APNG vs GIF vs Animated WebP

Frequently Asked Questions

Why is my APNG larger than the original GIF?

APNG is lossless and stores full 24-bit color with smooth alpha transparency, so it does not throw away colors the way a 256-color GIF does — that fidelity costs bytes. Our pipeline runs the output through apngopt with Zopfli compression to squeeze it as far as lossless allows, but for a noticeably smaller loop you can lower the framerate, cap the resolution, or use "By Color Reduction + Dither" under Colors. If you need the smallest possible web animation and can accept lossy compression, MKV to WebP or MKV to GIF will usually be smaller.

Do all browsers play APNG?

APNG has roughly 95% global browser support: Chrome 59+, Firefox 3+, Safari 8+, and Edge 79+ all animate it. In any browser that doesn't support it, the file gracefully falls back to displaying just the first frame as a static PNG, so it never breaks the layout. As of the W3C PNG Third Edition published in August 2025, APNG is part of the official PNG specification rather than an unofficial Mozilla extension.

Does the APNG keep transparency from my MKV?

Only if the source actually carries an alpha channel. Most MKV files use codecs like H.264 or HEVC that have no transparency, so the APNG will be fully opaque. If your MKV was encoded with an alpha-capable codec (for example VP9 or VP8 with alpha), the transparency is preserved end-to-end thanks to APNG's 8-bit alpha — one of its main advantages over GIF's hard 1-bit cutout.

How long should the clip be?

APNG is built for short loops, not full videos. Because every frame is stored losslessly, a long or high-framerate clip produces a very large file quickly — a 10-second 30 FPS loop is 300 frames of full PNG data. For best results keep it to a few seconds; if you only need a specific moment, trim the MKV first or drop the framerate to thin out the frames before converting.

Will converting to APNG reduce the quality?

The APNG frames themselves are lossless, so at "ORIGINAL" colors and 100% quality no pixel data is discarded — what you see in the source is what you get in the loop. In our testing, a 3-second 480p MKV clip at 10 FPS and default settings produced a clean APNG with no visible banding, whereas the same clip as a 256-color GIF showed obvious dithering in the gradients. Quality only drops if you lower the Image Quality (%) slider or choose color reduction to save space.

Are my uploaded files private?

Yes. Your MKV is sent over a TLS-encrypted connection, converted on our servers, and the upload and result are deleted automatically after a few hours. There is no sign-up, no watermark on the output, and files are never shared or made public.