Convert 3GP to MP4 — no upload, no lost memories

3GP was built for feature phones and MMS, not for anything you'd want to keep long-term. OpenConvertVideo converts those tiny clips to MP4 right in your browser, so they survive on whatever you own next.

Convert 3GP to MP4 →
  • No upload wait
  • Nothing leaves your device
  • Free, no account
  • No artificial size limits

Where 3GP clips come from

3GP (and its CDMA cousin 3G2) is the video format built for feature phones and the MMS standard of the 2000s. It's a stripped-down relative of MP4, designed to keep files small enough to send over a phone network measured in kilobits. Inside, you'll usually find H.263 or early H.264 video with AMR or AAC audio.

If you're opening one today, it's probably a clip someone sent you by MMS, something rescued off an old SD card, or a video pulled from a phone that's long since been replaced.

What to expect from the picture quality

These clips were often recorded at 176×144 or 320×240 pixels — tiny even by 2005 standards. Converting to MP4 doesn't add detail that was never captured; it puts the existing footage into a format that plays properly. Upscale it for a bigger screen and the file will get bigger, but the picture will look exactly as soft as it did on the original phone. That's not a limit of the conversion — it's the honest limit of what the phone recorded.

Preserving them privately

Old 3GP clips tend to be personal in a way that's easy to forget until you see them again — a kid's first steps, a friend messing around, a moment nobody thought to record any other way. OpenConvertVideo decodes and converts these files using WebAssembly ffmpeg running in your browser tab — we supply that code, but your own processor does the converting. There's no server in the middle, no account to create, and nothing to trust beyond your own computer. That old clip stays 100% private, exactly as it should.

What you'll get back

  • H.264 video in an MP4 container, with AAC audio.
  • Plays on any current phone, computer, or smart TV.
  • Uploads cleanly to messaging apps and social platforms that reject 3GP outright.
  • Imports into modern editors if you want to clean the clip up further.

Frequently asked questions

What is a 3GP file?
3GP (and the related 3G2) is a compact video format designed for feature phones and MMS messaging in the 2000s. It's a simplified relative of MP4 that usually holds H.263 or early H.264 video with AMR or AAC audio, built to keep files small enough for slow mobile networks.
Why is my 3GP video so small and blurry?
That's the resolution it was recorded at, often 176×144 or 320×240 pixels, which was normal for a phone camera in the mid-2000s. Converting to MP4 fixes compatibility, not resolution — the footage will look exactly as sharp as it did on the original phone, just in a format that plays everywhere.
How do I convert 3GP to MP4?
Choose your .3gp file in the converter, set the output to MP4 (H.264), and convert. It runs in your browser with nothing uploaded, so there's no wait for a file to transfer — and you end up with an MP4 that opens on modern phones, computers, and editors.
Can I make an old 3GP clip look better?
You can clean it up slightly with sharpening or stabilization in an editor after converting, but no conversion tool can add detail the original camera never captured. Treat the upgrade as fixing playback and compatibility, not picture quality — the resolution ceiling is set by the phone that shot it.
Is converting an old phone video private?
Yes. The file is decoded and re-encoded entirely on your device using WebAssembly ffmpeg. It never uploads to a server, so a personal clip from an old phone stays exactly as private as it was sitting on your hard drive.

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