3GP to WebM Converter
Convert 3GP to WebM free — no upload, no signup
To convert 3GP to WebM, drop your 3GP video into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. Put old phone clips on the web as WebM.
Drop videos here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
If the video already uses codecs that fit the new format, Fylo repackages it instantly with no quality loss.
Advanced
How to convert 3GP to WebM
Add your 3GP videos
Drag and drop 3GP files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Choose quality (optional)
Balanced quality suits most videos. If the codecs already fit WebM, Fylo repackages the file instead of re-encoding it, with no quality loss.
Convert and download
Click Convert, then download each WebM file or all of them as one ZIP.
Why convert 3GP to WebM?
Browsers don't play 3GP reliably. WebM works with HTML5 video.
What happens when you convert 3GP to WebM?
Video is re-encoded to VP8 and audio to Vorbis.
How does Fylo convert 3GP to WebM?
Fylo reads the 3GP with ffmpeg compiled to WebAssembly and writes VP8 with Vorbis audio, using libvpx's real-time preset so encoding stays practical in a browser. 3GP's usual codecs (H.263, H.264 (Baseline)) can't go into WebM as-is, so the video is re-encoded. Speed depends on your device: short phone clips take seconds, while on our slow test PC a 2-minute 1080p video took about 10 minutes. Only the first video and audio track are kept, and the original resolution is preserved unless you pick 1080p, 720p or 480p under Advanced.
What's the difference between 3GP and WebM?
3GP was defined by the 3rd Generation Partnership Project for 3G mobile phones and MMS messaging. It's based on the same ISO media structure as MP4 but restricted to phone-friendly codecs such as H.263 or H.264 Baseline video and AMR or AAC audio.
WebM was announced by Google in 2010 as an open, royalty-free alternative to H.264 for HTML5 video. It's a subset of Matroska restricted to VP8, VP9 or AV1 video and Vorbis or Opus audio. Browser screen recorders and many web tools save WebM by default.
Learn more: 3GP format guide · WebM format guide
| Property | 3GP | WebM |
|---|---|---|
| Developed by | 3rd Generation Partnership Project (3GPP) | |
| Introduced | 2002 | 2010 |
| Typical video codecs | H.263, H.264 (Baseline) | VP8, VP9, AV1 |
| Typical audio codecs | AMR, AAC | Vorbis, Opus |
| Plays in web browsers | Partly | Yes — Chrome, Edge, Firefox, Safari 14.1+ |
| Compatibility | Old feature phones, most media players | Browsers, Android; limited in editors and on iPhone apps |
| Best for | Very small videos for old phones and MMS | Royalty-free web video, screen recordings |
Frequently asked questions
Is MP4 better?
MP4 is more widely supported; WebM is royalty-free.
How long does it take?
A few seconds for typical phone clips.
Is my 3GP file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your 3GP file is read directly from your device and never sent anywhere.
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