How to convert 3GP to MP4
- Drop your 3GP file.
- Adjust quality, resolution or bitrate if you want (defaults are optimized).
- Optionally set a start time and duration to trim.
- Click Convert, watch the progress and download your MP4 file.
Why convert 3GP to MP4?
3GP is excellent for old feature phones, but it has some limitations:
- Very low quality
- Poor support in modern apps
Converting to MP4 gives you:
- Plays on virtually every device
- Good quality at small sizes
- Accepted by all social platforms
3GP vs MP4: side-by-side comparison
| Feature | 3GP | MP4 |
|---|---|---|
| Full name | 3GPP Multimedia | MPEG-4 Part 14 |
| File extension | .3gp | .mp4 |
| Type | Video | Video |
| Compression | Lossy | Lossy (H.264/H.265) |
| Transparency | No | No |
| Animation / multi-frame | Yes | Yes |
| Introduced | 2003 | 2001 |
| Developed by | 3GPP | MPEG (ISO) |
| MIME type | video/3gpp | video/mp4 |
| Best for | old feature phones | sharing, uploading and playing video anywhere |
What are 3GP and MP4 files?
3GP (.3gp)
3GP is an old mobile video format from feature phones. Many family videos from early Nokia and Symphony phones are stored as 3GP.
MP4 (.mp4)
MP4 is the most compatible video format today. Phones, YouTube, Facebook, WhatsApp and smart TVs all play MP4, usually with H.264 video and AAC audio.
Tips for the best MP4 results
- For phones and social media, MP4 (H.264 + AAC) is the safest choice for video and MP3 for audio.
- Very large files (over 1 GB) may exceed browser memory on phones; trim them or use a computer.
- Bookmark this page or install the app to convert 3GP files offline next time.
Private by design: how this converter works
Unlike typical online converters that upload your file to a remote server, this 3GP to MP4 converter processes everything on your own device using FFmpeg compiled to WebAssembly — the same engine used by professional video tools. Your file is read into browser memory, converted, and offered back as a download — it is never sent to us.
- No upload wait — conversion starts instantly, even on slow mobile data.
- Private — safe for NID copies, certificates, bank statements and personal photos.
- No limits — no daily quota, no queue and no watermark.
- Offline-ready — once loaded, many tools keep working without internet.
Frequently asked questions
Is this 3GP to MP4 converter free?
Yes — free, unlimited and without watermarks or sign-up.
Are my 3GP files uploaded to a server?
No. Conversion happens inside your browser on your own device, so your files stay private.
Will I lose quality converting 3GP to MP4?
MP4 uses lossy compression, so a tiny amount of detail is discarded. At the default high quality setting the difference is practically invisible. Increase the quality slider for maximum fidelity.
Can I convert several files at once?
Yes. Drop multiple files and download them individually or together as a ZIP.
Does it work on iPhone and Android?
Yes. It works in Chrome, Safari, Edge and Firefox on phones, tablets and computers. You can also install the site as an app.
What is the difference between 3GP and MP4?
3GP (3GPP Multimedia) is lossy and best for old feature phones, while MP4 (MPEG-4 Part 14) is lossy (h.264/h.265) and best for sharing, uploading and playing video anywhere.
Why does the first conversion take longer?
The FFmpeg WebAssembly engine (about 30 MB) is downloaded once and cached. Later conversions start immediately.