FLV to 3GP Converter
Convert FLV to 3GP free — no upload, no signup
To convert FLV to 3GP, drop your FLV 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. Make tiny 3GP clips from Flash video.
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 FLV to 3GP
Add your FLV videos
Drag and drop FLV 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 3GP, Fylo repackages the file instead of re-encoding it, with no quality loss.
Convert and download
Click Convert, then download each 3GP file or all of them as one ZIP.
Why convert FLV to 3GP?
Old phones and MMS services need 3GP; FLV won't play on them.
What happens when you convert FLV to 3GP?
Video is re-encoded to H.264 Baseline at up to 720p with AAC audio for small, phone-friendly files.
How does Fylo convert FLV to 3GP?
Fylo reads the FLV with ffmpeg compiled to WebAssembly and writes H.264 Baseline profile capped at 720p with 96 kbps AAC audio. FLV's usual codecs (H.264, Sorenson Spark, VP6) can't go into 3GP 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 larger videos are scaled down to 720p (or 480p if you choose it).
What's the difference between FLV and 3GP?
FLV (Flash Video) was introduced with Flash Player 6 and 7 in 2002–2003 and became the format behind early YouTube, news sites and video portals. Later FLVs usually contain H.264 video and AAC audio — the same codecs as MP4.
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.
Learn more: FLV format guide · 3GP format guide
| Property | FLV | 3GP |
|---|---|---|
| Developed by | Macromedia / Adobe | 3rd Generation Partnership Project (3GPP) |
| Introduced | 2003 | 2002 |
| Typical video codecs | H.264, Sorenson Spark, VP6 | H.263, H.264 (Baseline) |
| Typical audio codecs | AAC, MP3 | AMR, AAC |
| Plays in web browsers | No (Flash Player ended in 2020) | Partly |
| Compatibility | VLC and some desktop players; RTMP live-streaming tools | Old feature phones, most media players |
| Best for | Old Flash archives, RTMP streaming workflows | Very small videos for old phones and MMS |
Frequently asked questions
Will it play on feature phones?
Most phones with video support play 3GP.
Can I reduce size further?
Choose 480p under Advanced.
Is my FLV file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your FLV file is read directly from your device and never sent anywhere.
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