3GP to FLV converter
Convert 3GP to FLV in seconds, free and unlimited. No upload, no sign-up, no watermark: your video never leaves your device.
Last updated
Quick answer: To convert 3GP to FLV, add the 3GP file to the iHateFiles 3GP to FLV converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. Re-encodes the picture and sound into a FLV container.
Should you convert 3GP to FLV?
Do this when something specifically needs FLV. The picture is re-encoded, so it costs a little quality; if all you need is a file that plays everywhere, MP4 is usually the better target.
The picture is re-encoded
A 3GP usually holds H.263 or H.264 video with AMR or AAC sound from an old phone. This writes Sorenson Spark (FLV1) video with MP3 sound into the FLV. Both sides are compressed with loss, so this is a second generation: leave the quality at its default or higher, because the encoder is working from 3GP artefacts rather than the original.
Expect a larger FLV
FLV uses Sorenson Spark (FLV1) video, an older and less efficient codec than a 3GP normally holds. Matching the look takes more bytes, so the file grows. Do it for compatibility with whatever needs FLV, not to save space.
Where the FLV will play
FLV plays on VLC and very little else since Flash was retired in 2020.
3GP and FLV side by side
| 3GP | FLV | |
|---|---|---|
| Inside the file | H.263 or H.264 video with AMR or AAC sound from an old phone | Sorenson Spark (FLV1) video with MP3 sound |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| Plays on | old feature phones, VLC, and most modern players | VLC and very little else since Flash was retired in 2020 |
| Here | Read and write | Read and write |
What usually goes wrong
About the 3GP. Converting a 3GP does not improve it. The detail was never recorded, and upscaling only makes the file bigger.
About the FLV. If you have FLV files they are probably old downloads worth rescuing, and converting them to MP4 is the way to keep them watchable.
How to convert 3GP to FLV
- Add your 3GP file. It is read from your disk and stays there.
- Check the settings. The output format is already set to FLV.
- Press convert and the FLV file is saved back to your device.
Questions
How do I convert 3GP to FLV?
Open this page, add your 3GP file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this 3GP to FLV converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to FLV lose quality?
FLV is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several 3GP files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.