Convert an old mobile-phone video (.3gp/.3g2) to MP4 locally - usually lossless, otherwise automatically re-encoded. No upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
3GP (and its close cousin 3G2, common with US CDMA carriers) is a deliberately stripped-down mobile video container the 3GPP mobile-standards body designed specifically for slow 2G/3G networks - tiny resolutions, low bitrates, made to still fit through an MMS. Practically every feature phone and early smartphone recorded in this format before H.264 recording became standard on mobile.
Honest distinction: very old or particularly basic 3GP files often use H.263 or an early MPEG-4 Part 2 profile, codecs no browser decodes anymore - for those, the tool automatically re-encodes. Newer 3GP recordings (roughly from the mid smartphone era onward), by contrast, already carry H.264 and AAC and are only losslessly repackaged in seconds.
Also honest: the conversion does not improve the original recording's resolution or bitrate - a tiny MMS-era phone video stays tiny in its base quality, but at least becomes playable everywhere. Everything runs locally in the browser, with these often sentimental old recordings never uploaded.
| Input formats | 3GP, 3G2 |
|---|---|
| Output format | MP4 |
| Batch processing | No |
| Processing | Locally in your browser (WebCodecs) |
| File upload | None |
Limitations: If the 3GP already carries H.264/AAC (common for newer recordings), the conversion is lossless and finishes in seconds. With an older H.263/MPEG-4 codec, the tool automatically performs a full re-encode - frame by frame in your browser, which can take a while. Resolution and bitrate of the original recording are not improved in the process. One file per run, ~1 GB limit (4 GB/tab in the browser).
No, the entire conversion happens locally in your browser.
3G2 is the variant of the same mobile video standard used by US CDMA carriers - practically equivalent for this tool.
That comes from the original recording, not the conversion - 3GP was designed for very low resolutions over slow mobile networks. The conversion makes the file playable everywhere, but not sharper.
For newer H.264 recordings, yes, in seconds. For very old H.263 files, the automatic re-encode takes longer.
Usually from feature phones and early smartphones from the 2000s and early 2010s, often sent via MMS.
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