Convert WebM to MP4, free
Convert WebM to MP4 entirely in your browser; your file never uploads. Free, no signup, no watermark. Need a transcript afterward? Your first half hour is free.
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Free · no signup · runs in your browser · nothing uploads
Convert WebM to MP4 in one pass
Drop your WebM, let it convert in the browser, and download the MP4. No account, no upload, no watermark.
Nothing uploads
The whole conversion happens on your device. If the capture shows an internal tool or a private call, none of it is transmitted; the file is handled start to finish on your own machine.
Why MP4
WebM comes out of screen recorders, browser tools, and web video, but it doesn’t open everywhere: some editors, older phones, and upload forms want MP4 instead. Say you grabbed a browser screen capture as capture.webm and want to watch it on your iPhone; converting to MP4 first means it plays there natively instead of refusing to open. MP4 runs on virtually any device or app you hand it to.
What changes under the hood
WebM and MP4 usually carry different codecs (VP8/VP9 video and Opus audio, versus H.264 and AAC), so this conversion typically re-encodes rather than just swapping the container. Quality stays high; it’s just not the bit-for-bit copy that some MKV or MOV conversions can be.
Need a transcript?
After the words rather than the file? Skip the convert step entirely: give Hushscript the raw WebM, it lifts the audio, and returns a speaker-labeled transcript. Your first 30 minutes cost nothing.
Frequently asked questions
Does my file upload?
No. The WebM is converted locally, so nothing is uploaded.
Is it free?
Yes. It's free to run as often as you like, no account needed.
Will I lose quality?
WebM usually carries different codecs than MP4 (VP8/VP9 video and Opus audio, versus H.264 and AAC), so this is typically a re-encode rather than a bit-for-bit container swap. Quality stays high, but it isn't lossless the way some MKV or MOV conversions can be.
Why convert WebM to MP4?
WebM is common from screen recorders, browser tools, and web video, but it doesn't open everywhere. MP4 plays on virtually any phone, editor, and upload form.
Where do WebM files usually come from?
Screen recordings (OBS, Chrome's built-in recorder), some downloaded web video, and certain messaging apps.
Can I transcribe it?
Yes. After converting, transcribe the MP4 in the app with speaker labels included.
Need the words? Transcribe it with 30 free minutes
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