Convert MP4 to WebM
Free and instant — your MP4 files are processed securely on our servers and deleted right after conversion. Nothing is stored.
How to convert MP4 to WebM
- Step 01
Add your MP4 files
Drop them into the box above or click to browse. You can add several files at once.
- Step 02
Conversion starts instantly
Your file is sent to our servers, converted and deleted right away — no sign-up, no queue, no waiting.
- Step 03
Download your WebM files
Save each file individually or grab them all at once. Done.
Why convert MP4 to WebM?
WebM is the royalty-free video format built for the web — smaller than MP4 at the same quality. Converting your MP4 to WebM reduces file size for web projects, HTML5 video and platforms like YouTube that prefer the open format.
MP4 vs WebM at a glance
MP4 is the universal video format — plays on every device, browser and platform without extra codecs. WebM is the open web video format — smaller than MP4 at the same quality, royalty-free and supported by every modern browser.
| Property | MP4 | WebM |
|---|---|---|
| Extension | .mp4 | .webm |
| Full name | MPEG-4 Part 14 | WebM Video |
| First released | 2001 | 2010 |
| Developed by | ISO/IEC JTC 1 | |
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | No | No |
| Best for | video sharing, streaming and playback on any device | web video — open format supported natively by all browsers |
MP4 to WebM — frequently asked questions
Is this MP4 to WebM converter really free?
Yes — completely free, with no sign-up, no watermarks and no daily limits.
Will I lose quality converting to WebM?
WebM uses lossy compression, so the image is re-encoded at high quality (92%). For photos the difference is practically invisible; for text-heavy graphics or logos, a lossless format like PNG preserves sharp edges better.
Is the conversion private?
Video conversion runs on our servers with ffmpeg — your file is deleted immediately and never stored.
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