WMV to WebP Converter

Extract WebP Stills From a WMV

Windows Media Video is a video container; WebP is a still-picture format. So this conversion is a frame grab, not a transcode: it pulls one frame — or a series of frames — out of a .wmv and writes each one as its own WebP image. That is exactly what you want for a thumbnail from a legacy clip, a screenshot out of an old screen recording, or a set of contact-sheet stills from footage that macOS and Android cannot open natively. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours — no sign-up, no watermark.

How to Convert WMV to WebP

1. Upload Your WMV File: Drag and drop the .wmv or click to browse — Windows Movie Maker exports, old camcorder transfers, lecture captures and screen recordings all work. Only .wmv input is accepted on this page.
2. Choose Frame Selection: Specific Frame is preselected with a Time of 0 seconds, which grabs the opening frame. Type any timestamp in seconds to grab a different moment, or switch to Multiple Screenshots and set a Capture Rate — from one frame every 0.1 seconds up to one every 10 seconds.
3. Set Quality, Lossless and Resolution: The Quality Preset dropdown runs Highest down to Lowest with Very High (Recommended) preselected, or you can give a Specific file size in bytes, kilobytes or megabytes. Lossless? is set to No (Recommended) — switch it to Yes for a pixel-exact frame. Under Image resolution, Keep original is preselected; Resolution Percentage, a Preset Resolution (4320p down to 16P, height-based with width following the source aspect) or an explicit Width × Height are all available.
4. Convert and Download: Click Convert. Each selected frame is decoded to a lossless intermediate and re-encoded as WebP, then downloads individually or as one archive.

Specific Frame or Multiple Screenshots?

Neither mode produces an animation. If you want a single looping file rather than a pile of stills, WMV to GIF assembles the frames into one animated image instead.

WebP vs PNG vs JPG for a Frame Grab

The single-frame numbers above come from one 640×360 test frame; text-heavy and flat-colour frames compress far better than busy photographic ones, so treat them as a shape, not a promise.

Common Problems

• The grab is black or shows a title card. Time defaults to 0 seconds, and many clips open on a fade-in or a slate. Set Time to a couple of seconds into the action instead.
• Multiple Screenshots produced far more files than expected. Capture Rate is a period, not a count: 1 second per frame on a five-minute clip means 300 images. Widen it to 5 or 10 seconds, or use Specific Frame.
• Text and UI look smeared. Lossy WebP softens fine high-contrast edges. Set Lossless? to Yes for screen recordings, spreadsheets and anything with small type.
• The frame looks soft even at Highest. WMV files are often 480p or 720p to begin with, and no re-encode adds detail that the source never had. Enlarging with the resolution controls scales the same pixels up.
• The clip will not open on a Mac or a phone at all. That is a decoder problem on your device, not a file problem — see the FAQ below.

Frequently Asked Questions

Does Multiple Screenshots create an animated WebP?

No. WebP does support animation, but this page produces stills only: Multiple Screenshots writes each sampled frame as its own separate WebP file. If you want a single file that moves, convert to an animated format instead — WMV to GIF gives you one looping image.

Will the WebP have any sound?

No. WebP is an image format with no audio track, so the WMA audio inside the WMV is discarded. To keep picture and sound together in something modern devices can play, convert WMV to MP4.

When should I turn Lossless? on?

Whenever the frame contains text, user-interface elements, line art or flat colour — the content where lossy compression's ringing artifacts are most visible. On our 640×360 test frame, lossless WebP came out at 18.9 KB against 28.4 KB for the same frame as PNG, so you keep an exact copy and still save about a third of the bytes. For photographic frames, leave it on No (Recommended) and let the Quality Preset do its job.

How much smaller is a WebP frame than the equivalent PNG?

Google publishes an average of 26% for lossless WebP against PNG. Our single measured frame came in about 33% smaller, which is normal variance — synthetic and flat-colour images beat the average, and dense photographic ones fall short of it. The lossy mode is a different scale of saving entirely: the same frame was 5.3 KB.

Why won't my WMV play on a Mac or an iPhone?

WMV is Microsoft's format: a Windows Media codec (WMV7, WMV8, WMV9 or VC-1) inside an ASF container. macOS, iOS and Android ship no decoder for it, so the file simply will not open without third-party software. Pulling out a WebP still, or converting the whole clip with WMV to MP4, gives you something those platforms handle natively.

Is there a resolution ceiling I could hit?

Practically, no. WebP caps a single image at 16,383 × 16,383 pixels, and WMV sources are almost always 1080p or below — many are 720p or 480p. You will run out of source detail long before you run out of WebP canvas.

What does the Specific file size option do that the Quality Preset does not?

The Quality Preset picks a fixed quality level and lets the file size land where it lands; Specific file size works the other way round, aiming at a byte budget you type in. Use the preset when image quality is what matters and the file-size target when you have a hard upload or attachment limit to meet.

Can I grab frames from several WMV files in one go?

Yes. Queue as many .wmv files as you like; the Frame Selection, quality and resolution settings apply across them, and each file is processed independently on our servers. The outputs download one by one or together as a single archive. Uploads are encrypted in transit, and the files are deleted automatically after a few hours — never shared or made public.