Why won't my old 3GP video convert?

Phones from the 2000s recorded H.263 video with AMR audio, codecs browsers can't decode. Smartphone 3GP files use H.264 and AAC and convert quickly.

Is 3GP to MP4 lossless?

Yes, for H.264 and AAC 3GP files. Both tracks are copied, so the MP4 has the same quality.

3GP to MP4

Convert a 3GP phone video to MP4. Processing stays on your device.

Files stay on your device

Drop a file to convert

See its format, then choose an output.

Any media file this browser’s engine can read.

How to convert 3GP to MP4 online

Open a 3GP video from a phone and export an MP4 that plays on computers, TVs, and social apps. 3GP is a variant of MP4, so the 3GP to MP4 converter copies H.264 video and AAC audio without re-encoding, in your browser.

Step 1
Choose your 3GP
Pick a file or drop it into the converter above.
Step 2
Keep MP4
MP4 is selected; choose another format if you need one.
Step 3
Download the MP4
Save the MP4 when the conversion finishes.

What to expect

Supported inputs: 3GP phone videos and other readable video files.
What happens: H.264 video and AAC audio are copied into MP4 unchanged. Other tracks are re-encoded when this browser can decode them.
Limits: Old feature-phone 3GP files with H.263 video or AMR audio can't be read yet. Files from smartphones, which use H.264, convert.

Private by design

Your video stays on your device

Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.

No upload
No signup
No watermark