Convert WMV to APNG Online

Convert WMV to APNG Online

WMV (Windows Media Video) is a legacy Microsoft video format that plays cleanly only on Windows Media Player and a handful of desktop apps. APNG (Animated PNG) is a lossless, always-animated image format with full 24-bit color and 8-bit alpha transparency. Converting WMV to APNG turns a short clip into a self-looping animation you can embed anywhere a PNG works — with sharper edges and truer color than a GIF, at the cost of a larger file. This converter is built for short loops, logos, and UI captures, not for full-length video.

WMV Format at a Glance

APNG Format at a Glance

APNG vs GIF vs WebP — What You're Choosing Between

APNG wins on visual fidelity: smooth alpha edges and full color, with no banding from a 256-color palette. The trade-off is size — because APNG is lossless, a clip is usually larger than the same clip as GIF, and much larger than animated WebP. Pick APNG when clarity and transparency matter more than bytes (an animated logo over a patterned background is the classic case). If you need maximum compatibility instead, WMV to GIF trades color for universal playback; for the smallest web download, keep the clip as video.

How to Convert WMV to APNG

1. Upload Your WMV File: Drag and drop or click "Add Files" to select a WMV video. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. Batch conversion is supported.
2. Pick a Framerate: Choose from the Framerate dropdown — 10 FPS is the default and reads as smooth motion for most loops. Every step up multiplies the frame count, and since each frame is stored losslessly, it multiplies the file size almost linearly.
3. Set the Image Resolution: Keep the original, choose a preset such as 720p or 480p, scale by percentage, or enter a custom width and height. Ticking "use as max resolution" caps oversized clips while leaving already-small ones alone. There is no quality slider or palette control here by design — APNG frames are written losslessly, so dimensions and framerate are the size levers.
4. Convert and Download: Click Convert and download your APNG. No sign-up, no watermark, never shared or made public.

Frequently Asked Questions

Why is my APNG so much larger than the source WMV?

APNG is lossless and stores full 24-bit color with per-pixel alpha for every frame, so it cannot match the inter-frame compression of a video codec like VC-1. A short WMV at a few hundred KB can become a multi-megabyte APNG. In our testing, a 5-second 480p clip at 10 fps produced an APNG roughly 8-12x the size of the source WMV. There is no quality or colour-reduction control to trade away here, so the fixes are structural: keep the clip to a few seconds, drop the framerate to 10 fps or below, and reduce the Image Resolution. If you need a palette-reduced, quality-adjustable output, WMV to GIF exposes both a Colors control and an Image quality (%) slider.

Does APNG keep the transparency from my video?

WMV does not carry an alpha channel, so there is no transparency in a typical WMV to preserve. APNG itself fully supports 8-bit alpha — so if you later composite or edit the APNG, you have a real per-pixel alpha channel to work with, unlike GIF's hard-edged 1-bit transparency. For source video that does have alpha (such as some WebM exports), APNG preserves it cleanly.

Should I convert WMV to APNG or to GIF?

Choose APNG when you need full color and smooth transparency — logos, detailed UI captures, gradient-heavy art. Choose GIF for maximum compatibility, especially email, where APNG is not reliably supported but GIF is universal. APNG produces a sharper, truer-color result; GIF produces a smaller, more portable one. If GIF fits your use case, see WMV to GIF.

Is APNG an official standard now?

Yes. APNG began as a 2004 Mozilla proposal by Stuart Parmenter and Vladimir Vukićević and ran for two decades as a de-facto format, but it was folded into the PNG Specification, Third Edition, which the W3C published as a Recommendation on 24 June 2025. That document defines the acTL, fcTL and fdAT animation chunks and registers image/apng as an official media type, so calling APNG a non-standard extension is out of date.

Which browsers play APNG files?

APNG works in Chrome 59+, Firefox 3+, Safari 8+, Edge 79+, and Opera 46+ — 95.94% of global traffic per caniuse. Internet Explorer and the legacy non-Chromium Edge never supported it. In any browser without APNG support, the file degrades gracefully to a static first frame, never a broken image.

What framerate should I pick for a WMV to APNG conversion?

10 fps is the default and a good balance for most loops — smooth enough to read motion while keeping the file manageable. Because APNG is lossless, frame count drives size more aggressively than it does for video, so going above 12-15 fps inflates the file quickly. For long or high-motion clips, stay at 10 fps or lower and keep the clip short.

Does the converted APNG include audio from the WMV?

No. APNG is an image format and has no audio track, so any WMA audio in the WMV is dropped during conversion. If you need to keep sound, convert to a video format instead — for example WMV to MP4 preserves both video and audio.

Can I batch convert multiple WMV files to APNG at once?

Yes. Add as many WMV files as you like and they convert on our servers in parallel. Download each APNG individually or as a single ZIP. The practical limit per file is upload size and time, not the format — keep clips short, since APNG grows fast with duration and resolution.