3GP to FLV Converter
Convert 3GP to FLV free — no upload, no signup
To convert 3GP to FLV, 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. Convert phone clips to FLV for streaming tools.
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 FLV
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 FLV, Fylo repackages the file instead of re-encoding it, with no quality loss.
Convert and download
Click Convert, then download each FLV file or all of them as one ZIP.
Why convert 3GP to FLV?
Some legacy portals and RTMP tools need FLV.
What happens when you convert 3GP to FLV?
H.264 3GP files are repackaged; others are re-encoded to H.264 with AAC audio.
How does Fylo convert 3GP to FLV?
Fylo reads the 3GP with ffmpeg compiled to WebAssembly and writes H.264 with AAC audio at 44.1 kHz, the sample rate Flash-era players expect. Most 3GP files already contain H.264 video, so Fylo usually copies the video without re-encoding (and converts only the audio if needed), which is fast and lossless. 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 FLV?
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.
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.
Learn more: 3GP format guide · FLV format guide
| Property | 3GP | FLV |
|---|---|---|
| Developed by | 3rd Generation Partnership Project (3GPP) | Macromedia / Adobe |
| Introduced | 2002 | 2003 |
| Typical video codecs | H.263, H.264 (Baseline) | H.264, Sorenson Spark, VP6 |
| Typical audio codecs | AMR, AAC | AAC, MP3 |
| Plays in web browsers | Partly | No (Flash Player ended in 2020) |
| Compatibility | Old feature phones, most media players | VLC and some desktop players; RTMP live-streaming tools |
| Best for | Very small videos for old phones and MMS | Old Flash archives, RTMP streaming workflows |
Frequently asked questions
Can I play FLV in a browser?
No.
Is quality kept?
Yes when repackaged.
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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