Convert WebM to MP4
Convert WebM screen recordings and web videos into MP4 files you can edit, share, and play anywhere - including on Apple devices. Processing is 100% local.
100% local - your file is never uploaded
Drop your WebM file here, or click to select
Supports video/*,.webm
How to convert WebM to MP4
- 1
Drop your WebM file into the box above, or click it to browse
- 2
Click "Convert WebM to MP4" - processing runs locally in your browser
- 3
Watch the progress bar - nothing is uploaded, so there is no waiting on a network
- 4
Download your MP4 file when the conversion finishes
Why convert WebM to MP4?
WebM is the format browsers produce: screen recorders, Google Meet recordings, and many web apps output it by default. But iPhones, iPads, most video editors, and platforms like Instagram handle WebM poorly or not at all. Converting to MP4 (H.264/AAC) makes the recording universally usable while keeping quality intact.
WebM
WebM is an open, royalty-free container built for the web, typically pairing VP8/VP9 video with Opus or Vorbis audio. Browser-based screen recorders almost always produce WebM.
MP4
MP4 is the format editors and devices expect. Converting your WebM recording to MP4 means it drops straight into iMovie, Premiere, CapCut, or an email attachment without complaints.
Frequently asked questions
Why will my screen recording not open in my video editor?
Most desktop and mobile editors have little or no support for VP8/VP9 inside WebM. Converting to MP4 re-encodes into H.264, which every editor imports natively.
Does converting WebM to MP4 lose quality?
The video is re-encoded from VP8/VP9 to H.264, which is technically lossy, but at the bitrates used the difference is not visible for screen recordings and typical footage.
Is there a file size limit?
There is no artificial limit - since nothing is uploaded, you are bounded only by your device's memory. Multi-gigabyte recordings work on most modern machines.
Need more options like other formats or quality settings? Use the full Video Converter tool.