WMV to WebP Converter

Extract WebP Stills From WMV Online

This tool pulls frames out of a Windows Media Video (WMV) file and saves each as a still WebP image. Use it to grab a thumbnail from a legacy clip, or to export a set of separate frames as a sequence of individual still images — handy when a Windows-only WMV won't open on a Mac or phone and you just need the picture, not the video. WebP keeps those frames sharp while staying smaller on disk than the same frame saved as PNG or JPEG.

How to Convert WMV to WebP

1. Upload Your WMV File: Drag and drop or click "Add Files" to select WMV recordings — Windows Movie Maker exports, old camcorder clips, lecture captures, or any Windows Media Video file. Batch is supported; drop several clips and each is processed in parallel.
2. Choose Frame Selection: Pick Specific Frame to extract one still WebP from a chosen moment (set the time in seconds), or Multiple Screenshots to sample frames across the clip and save each as its own separate still WebP image. Multiple Screenshots produces a set of individual files, not a single moving image.
3. Tune Quality, Lossless, and Resolution (Optional): Choose a Quality Preset (Highest down to Lowest; Very High is the default), set a Specific file size target in KB or MB, or switch Lossless? to Yes for pixel-perfect frames — useful for screen recordings of text or UI. Under resolution, keep the original size, scale by Resolution Percentage, pick a Preset Resolution (4320p down to 144p), or enter exact Width × Height.
4. Convert and Download: Click Convert. Each frame is decoded and re-encoded as WebP on our servers, then you download the stills individually or as a single ZIP. No sign-up, no watermark, no email.

WMV vs WebP — Format Comparison

Why WebP for the Frame Grab?

• Smaller than PNG or JPEG at the same quality — Google measures lossless WebP at about 26% smaller than PNG, and lossy WebP at 25-34% smaller than JPEG at equivalent visual quality. A frame you'd otherwise save as a heavy PNG screenshot lands lighter as WebP.
• Optional lossless mode — Switch Lossless? to Yes (VP8L) for a pixel-exact copy of the frame, which matters for screen recordings of text, UI, or line art where lossy artifacts show.
• Keeps transparency — If your source frame has an alpha channel, WebP preserves it in both lossy and lossless modes, unlike JPEG.
• Opens in modern browsers and apps — WebP renders inline in Chrome, Firefox, Edge, and Safari 16+, so the stills drop straight into a webpage or doc without a converter on the viewer's end.

Frequently Asked Questions

Does Multiple Screenshots make an animated WebP that loops?

No. Multiple Screenshots samples frames across the clip and saves each one as a separate still WebP file — you get a set of individual images, not a single looping animation. Specific Frame gives you exactly one still. If you want a moving image that loops, convert to an animated format instead with WMV to GIF, which produces a single animated file.

Will the converted WebP have sound?

No. WebP is an image format and carries no audio track, so a frame grab is silent. If you need the WMV's video and audio together in a portable file, convert to MP4 instead via WMV to MP4.

Should I pick Specific Frame or Multiple Screenshots?

Use Specific Frame when you want a single image — a thumbnail, a documentation screenshot, or a hero frame from a known timestamp. Use Multiple Screenshots when you want several stills sampled across the clip, for example to preview a sequence or pick the best frame afterward. Remember each screenshot is its own file, so a long clip can produce a lot of images.

How much smaller is a WebP frame than the same frame as PNG?

For a pixel-exact copy, Google reports lossless WebP averaging about 26% smaller than PNG. In our testing, a single 1080p frame from a typical screen-capture WMV saved at Lossless? = Yes came out noticeably smaller than the equivalent PNG export of the same frame, with no visible difference. Flat-color and text-heavy frames compress best; busy photographic frames see a smaller gap.

What's the maximum WebP resolution I can output?

The WebP format caps a single image at 16,383 × 16,383 pixels, which is far above any practical WMV source — most WMV files top out at 1080p, often 720p, with older clips at 480p or below. You won't hit that ceiling converting from WMV.

Why won't my WMV file open on Mac or iPhone?

WMV uses Microsoft's ASF container with WMV9 or VC-1 codecs, which don't ship with macOS, iOS, or Android by default, so most Macs and phones have no native WMV decoder. Extracting a WebP frame (for a still) or converting to MP4 via WMV to MP4 (for video with audio) gives you a file that opens on modern platforms.

Can I batch convert multiple WMV files at once?

Yes. Upload as many WMV files as you like and apply the same Frame Selection and Quality Preset to all of them, or set options per file. Each file is processed in parallel on our servers and downloads individually or as a single ZIP. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public.