Convert MP4 to WebM
Produce royalty-free WebM versions of MP4 videos for web embedding and open-source pipelines.
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 MP4 video
Drop the MP4 file in — anything up to 20 minutes long, sized to your plan's upload limit.
Pick format and quality
WebM is preselected; choose high, standard, or small-file output before starting the conversion.
Download the WebM
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.
Open Web Format
WebM is the web's royalty-free video container — ideal for embedding on pages, HTML5 players, and open-source pipelines.
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 exists for the open web: no licensing strings, first-class HTML5 <video> support, and typically smaller files than H.264 at similar quality thanks to the VP9 codec. If you're embedding video on a site, shipping assets in an open-source project, or targeting a pipeline that standardizes on WebM, converting your MP4 masters produces the right deliverable — keep the MP4 as the universal fallback source.
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.