Convert WebM to MP4
Convert your WebM video to MP4. Free, instant, private — nothing is uploaded.
Drop your WebM video here, or click to browse
Converts WebM to MP4 — .webm files only
Related tools
Why use PixelTools to convert webm to mp4
Clean WebM to MP4 conversion
Fully re-encodes an open, VP8/VP9-encoded video container built for the web into the most universally compatible video container, usually wrapping H.264 or H.265 video with AAC audio, using ffmpeg's native encoders so the output plays correctly wherever MP4 is expected.
100% private — no upload
Conversion runs entirely in your browser using WebAssembly. Your WebM file is never sent to a server, stored, or seen by anyone but you.
No account, no watermark
Free to use with no sign-up, no file limits, and no watermark on the output.
Why convert to MP4
The one format virtually every phone, editor, platform, and TV accepts without question.
Works on any device
Fully responsive with touch-friendly controls — convert files from your phone, tablet, or desktop without installing anything.
Safe for sensitive footage
Because nothing leaves your device, this is safe to use on personal recordings, unreleased footage, or clips you can't upload to a third-party server.
Three steps to convert webm to mp4
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Drop your WebM video
Drag and drop your WebM file onto the page, or click to browse. Nothing is uploaded — the file stays on your device.
- 2
Conversion runs in your browser
A WebAssembly build of ffmpeg re-containers or re-encodes the video to MP4 entirely on your device. A progress bar shows the conversion as it runs.
- 3
Download your MP4 file
Preview the result right on the page, then click Download to save the MP4 file to your device.
Who converts WebM to MP4?
Whether you're a video editor, a content creator, or just need one clip in a different container — PixelTools converts WebM to MP4 instantly in your browser, with no upload and no account needed.
Working with Loom and Zoom recordings, browser screen captures, and downloaded web video
WebM files typically come from Loom and Zoom recordings, browser screen captures, and downloaded web video. Converting to MP4 makes them usable in the apps and platforms that actually need them.
Publishing or sharing as MP4
The one format virtually every phone, editor, platform, and TV accepts without question, which is exactly why people convert WebM to MP4 before sharing, uploading, or editing.
Editing and production workflows
Video editors and producers convert WebM to MP4 to match the container their NLE, platform, or client actually expects.
Fixing playback on the destination device
A WebM file that won't open on a phone, TV, or web uploader often just needs its container swapped to MP4 — no other editing required.
Frequently asked questions
Is the WebM to MP4 converter free?
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Yes, completely free with no limits. Convert as many files as you want. No subscription, no account, no watermark.
Does this tool upload my video to a server?
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No. The conversion happens entirely in your browser using WebAssembly. Your WebM video never leaves your device.
Why convert WebM to MP4?
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WebM is an open, VP8/VP9-encoded video container built for the web, typically from Loom and Zoom recordings, browser screen captures, and downloaded web video. The one format virtually every phone, editor, platform, and TV accepts without question.
Will the video quality change?
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This conversion always re-encodes the video and audio into the target codec, so it isn't literally lossless — but it uses a quality setting tuned to be visually indistinguishable from the source at typical viewing sizes, at the cost of a longer conversion than a same-length stream-copy pair.
Is there a file size limit?
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Files up to 2GB are supported. Very large files take longer to process since everything runs on your device's CPU rather than a server.
Can I use the converted MP4 file commercially?
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PixelTools does not claim any rights over files you process. The output is yours to use however you like, subject to any rights the original file's owner holds.
My Loom recording downloaded as WebM and Premiere won't import it — now what?
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Loom, and most browser-based screen recorders, export WebM by default (VP8/VP9 video, Opus audio) — a format most desktop video editors like Premiere Pro, Final Cut, and DaVinci Resolve don't support natively. Converting to MP4 (H.264/AAC) is a genuine re-encode here, not a fast copy, since the codecs themselves are changing — expect it to take noticeably longer than a MOV-to-MP4 conversion of the same length.
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