Convert WEBM to MP4 online — free
Downloaded a WEBM video that won't open in your editor? Convert it to universal MP4.
- No watermarks
- Works on mobile
- First fix free, no signup
FixTheFile AI Studio- 1Upload
- 2Pick a fix
- 3Download
- 1Upload
- 2Pick a fix
- 3Download
Drop any file. AI picks the fix.
Images, audio, video, PDF, Word and ZIP — up to 500MB. Or click anywhere to browse.
image → upscale · audio → clean noise · video → extract audio · pdf → text · zip → repair
How it works
How to convert WEBM to MP4
Upload your WEBM file
Any WEBM video, up to 500MB.
Select "Convert format"
FixTheFile converts to MP4 using FFmpeg.
Download your MP4
Opens in every video editor and player.
Why FixTheFile
Universal MP4 from any WEBM file
Works in every video editor
MP4 has far broader software support than WEBM.
No codec packs needed
Converts directly in your browser.
Free first fix
No signup required to try.
Keeps audio track
Sound carries over during conversion.
Private processing
Files are never reviewed by humans.
Also compresses video
Shrink the MP4 afterward if needed.
How do I convert WEBM to MP4 for free?+
Upload your WEBM to FixTheFile and select Convert format — it downloads as MP4.
What is WEBM?+
An open video format common in browser recordings, screen captures, and some downloads.
Will quality change?+
FixTheFile re-encodes the video at a comparable bitrate — quality loss is minimal.
What's the max file size?+
Up to 500MB per upload.
Can I also extract just the audio?+
Yes — use Extract audio to pull an MP3 from the WEBM instead.
Ready to get started?
No software needed. Works on any device. First fix is free.
Convert WEBM to MP4 free