Convert WebM to MP4
Convert browser screen recordings and WebM downloads into MP4s that iMovie, Premiere, iPhones, and upload forms accept.
This tool uploads the video over TLS and runs transcoding as a background server job. Sign in before selecting a file; retained copies expire on your plan’s schedule.
Video compression runs on secure servers.
Full video re-encoding uploads over TLS and runs as a background server job for videos up to 20 minutes. Workspace access to server-processed inputs and outputs expires after 7 days on free accounts and no later than 30 days on paid plans. Download URLs expire no later than that access boundary. Expired objects are queued for automatic cleanup, and deletion is retried if storage removal fails. A free account includes 10 server jobs per month with no card required.
Need more? A 1-day pass starts at $3, with no subscription. See plans
source file to finished file, step by step.
These steps describe the source file input and the finished file export for this exact route.
Upload your WebM video
Drop the WebM file in — anything up to 20 minutes long, sized to your plan's upload limit.
Pick format and quality
MP4 is preselected; choose high, standard, or small-file output before starting the conversion.
Download the MP4
The background server job re-encodes your video and returns a download link. Workspace access to encrypted retained server objects expires on your plan’s schedule. Expired objects are queued for automatic cleanup, and deletion is retried if storage removal fails.
What to expect
What matters for finished file output.
Review the behavior this source file to finished file tool is designed to preserve, expose, or simplify.
Secure Server Transcode
Re-encoding is heavy work, so it runs as a background server job after a TLS upload. Workspace access to encrypted retained server objects expires on your plan’s schedule. Expired objects are queued for automatic cleanup, and deletion is retried if storage removal fails.
Plays Everywhere
MP4 with H.264 video and AAC audio is the most widely supported video format there is — phones, TVs, editors, social uploads, and every browser.
Quality Presets
Pick high, standard, or small-file output — the encoder balances visual quality against file size for you.
Questions about source file and finished file.
Check the format behavior, limitations, and follow-up options before processing a real file.
WebM is what browser-based screen recorders and many download tools produce — great on the web, awkward everywhere else. iMovie and iPhones won't open it, Premiere support is inconsistent, and plenty of platforms only accept MP4 uploads. Re-encoding to H.264/AAC MP4 gets your recording into editors and onto services without a codec detour.
Related routes
Continue from finished file.
Choose another format only when it matches the next job.
Next step
Ready to process another source file file?
Start here again, or compare plans when the job needs server capacity, retention, or repeat automation.