Free tools
Convert MP4 to WebM for free
Convert MP4 to WebM in your browser: choose an .mp4 file, convert it, and download the WebM. No signup, nothing uploads.
Drop a file or click to choose
Free · no signup · runs in your browser · nothing uploads
Want the words, not just the clip?
Try a speaker-labeled preview of up to 5 minutes from your audio or video before creating an account, then get another free preview of your first upload in the app.
Get 30 free minutesWant the words, not just the clip?
Try a speaker-labeled preview of up to 5 minutes from your audio or video before creating an account, then get another free preview of your first upload in the app.
Get 30 free minutesWhy is this free? Hushscript runs it entirely in your browser. No server processes your file, so there's nothing to charge for.
How to convert MP4 to WebM
Choose an .mp4 file from your device, run the conversion, then download the .webm result. This MP4 to WebM converter works in your browser without a signup or a video upload. Keep the tab open while it processes the file.
Turn an MP4 into a web-ready WebM
WebM keeps files smaller and loads well in browsers and web apps that prefer it over MP4. In current Chrome, Edge and Firefox, this tool re-encodes the video to VP9 and the audio to Opus, falling back to VP8 when the browser can’t encode VP9. Re-encoding always runs here, it’s slower in Firefox than in Chrome or Edge, and a long video can take several minutes.
Need a transcript from your MP4?
Video transcription is a separate, gated service. Hushscript prepares audio from a local video file in your browser and uploads that prepared audio for speech recognition; the source video stays on your device. Eligible personal accounts can receive 30 free minutes once after successful card verification, or with their first purchase if not already granted. Transcribe a video after signing in.
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Frequently asked questions
Is this MP4 to WebM converter free?
Yes. Converting an MP4 file to WebM here is free and needs no account. The file is processed in your browser and is not uploaded for conversion.
Does converting MP4 to WebM upload my file?
No. The conversion runs locally in your browser. You choose the MP4 on your device and download the WebM from the same page.
Why convert MP4 to WebM?
WebM is the video format many websites, web apps and players prefer for smaller, streaming-friendly files, so an MP4 sometimes needs converting before it fits that use.
How is the WebM encoded?
In current Chrome, Edge and Firefox, this tool re-encodes the video to VP9 and the audio to Opus, using VP8 instead of VP9 if the browser can't encode it. Re-encoding is slower in Firefox, and a long video can take several minutes.
Can I convert several MP4 files at once?
This converter handles one file at a time. Choose and convert another file after downloading the first result.
Can I transcribe the MP4 instead?
Yes, through Hushscript's separate transcription service. Sign in to upload prepared audio from a local video file, with speaker detection if needed.
Need the words? Transcribe it with 30 free minutes
Preview up to 5 minutes before you create an account, and a new personal account gets a free preview of its first upload in the app. Full transcription needs an account and minutes; eligible personal accounts get 30 free minutes once, after card verification or with a first purchase. No subscription.
Get 30 free minutes