WebM to MP4 Converter
Drop in a WebM and get back an MP4 that plays everywhere. The conversion runs in your browser, on your machine, and your video never uploads anywhere.
Drop your WebM here
Saved web video, browser recordings, screen captures.
Converts on your device. Your file never leaves this page.
- VP8 and VP9 handled
- Videos without audio work too
- No upload, converts on-device
- Free, no sign-up, no watermark
A converter that stays out of your way.
There’s no upload bar and no sign-up wall. You get your file back as an MP4, and that’s the whole transaction.
WebM in, MP4 out
Drop in a WebM file and get back an MP4 that plays on phones, TVs, editors, and upload forms alike. Same name, same footage.
Fast when the file allows it
When the video inside is already MP4-friendly, it gets repackaged in seconds with zero quality loss. Only files with older codecs need a real re-encode.
Your video stays on your machine
Most online converters upload your footage to their server. This one doesn't. The work happens inside this browser tab, and closing the tab clears everything.
Sound handled too
The audio track comes along automatically, converted only if the format demands it. Videos without sound convert just the same.
The browser’s home format, leaving home
WebM was built for the web, and inside a browser it’s excellent: small, fast, royalty-free. The problem starts the moment the file leaves. Video editors give it a cold stare, iPhones won’t play it, TVs pretend it doesn’t exist, and half the upload forms on the internet reject it on file extension alone.
So this is a real conversion, not a repackage. The web-native video gets re-encoded into the H.264 that every device on earth plays, right in your browser tab, with the file never leaving your machine. It’s slower than the instant repackages elsewhere on this site, and the page is upfront about that; it’s also the honest minimum the format demands.
Browser recordings are the usual suspects
The WebM files people actually need converted are rarely downloads; they’re recordings. Browser-based screen recorders, webcam capture tools, meeting apps that hand you “the recording” as WebM, online whiteboards that export sessions. The recording is fine until it needs to go somewhere: an editor, a client, a phone, a slide deck. Then it needs to be MP4.
Drop it in and let the bar crawl. A five-minute recording converts in a couple of minutes; leave the tab open for long ones and do something else. It’s still faster than uploading a gigabyte to a converter site and downloading it back.
When the quality question actually matters
For screen recordings and talking-head video, the re-encode is invisible; text stays crisp and faces stay faces. Where you might notice is dense, fast-motion footage saved from the web at high quality. If that’s your case and the source site still has the video, the cleaner path is downloading it as MP4 directly, which is the Vidferry app’s whole job: it grabs the site’s own MP4 stream, no re-encode involved at all.
How to convert WebM to MP4
Three steps, less than a minute. No setup, no sign-up.
Drop in the WebM file
Drag it into the box above, or click Choose a file and pick it from a folder.
Let it work
Most WebM files just get repackaged and finish in seconds. Files that need a real re-encode take longer; the progress bar tells it straight either way.
Save the MP4
Hit Download and the MP4 lands with the same name as the original, ready to play, edit, or upload anywhere.
WebM to MP4 converter FAQ
Because WebM genuinely needs converting. It carries web-native codecs that MP4 players don't speak, so the video gets re-encoded frame by frame rather than repackaged. Short clips still finish quickly; an hour of footage is a coffee-break job. The progress bar tells it straight.
Slightly, as any re-encode does, though at these settings the difference is hard to spot on screen recordings and web clips. WebM to MP4 is one of the few pairs where a small quality cost is simply the price of compatibility.
Mostly the browser: video saved from web pages, recordings made by browser-based screen recorders and camera tools, and exports from web apps. The format is great inside a browser and awkward everywhere else, which is usually why you're here.
No. Plenty of WebM screen captures are silent, and they convert fine; the MP4 simply comes out video-only.
No. The whole conversion runs inside this browser tab, on your machine. Nothing about the file is sent to us or anyone else.
This converts files you already have. Vidferry goes and gets them.
Paste a link from YouTube, Vimeo, or 1,000+ other sites and the Vidferry app saves the video as a clean MP4 directly, whole playlists included, at your machine's full speed. Same privacy, $12 once.
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Paste your first link in under a minute. $12 once, yours to keep, on Mac and PC.