How to use the 3GP to MP4 converter
- Pick the clips, straight from a memory card or a copied phone folder.
- Select High quality; these clips are small and low resolution to begin with.
- Convert to MP4 and save the results.
The codecs inside 3GP
Typical 3GP clips are tiny, 176×144 or 352×288, with H.263 or MPEG-4 picture and 8 kHz AMR-NB speech audio. Current players are dropping these formats, so the picture is encoded as H.264 and the sound as AAC.
Resolution stays as it was. A 352×288 clip remains 352×288, since stretching it would only add bytes, not detail.
Quick and usually smaller
At these sizes each conversion tends to take a second or two. The MP4 is often lighter than the original too, since H.264 is the more efficient codec.
Converting a full folder is the easy way: drop it in, wait for the queue, and download one ZIP. Each MP4 keeps the base name of its source clip, so dates or numbering in the file names survive.
Getting old memories into today’s apps
Mid-2000s handsets, from Nokia, Sony Ericsson, early Samsung models and others, kept their clips on memory cards. Copy the DCIM or Videos folder to your computer and drop that folder here.
Upload the MP4s to Google Photos, iCloud or a shared family album, services that often reject or mangle the original 3GP files.
Questions
Will the sound improve?
No. AMR is narrowband speech audio, and AAC keeps it as recorded; frequencies that were never captured cannot be added back.
Does 3G2 work?
Yes. 3G2 is the CDMA network variant and is handled identically.
Why choose High quality for such small clips?
The source already has very little detail, and the files are tiny, so the slightly larger output of High is worth it to avoid losing any more.
Are the clips uploaded?
No. They are decoded and encoded inside your browser, so private family videos stay on your device.