Convert 3GP to MP4
Videos from older mobile phones were saved as 3GP. Bring those memories back by converting them to MP4 – quickly, privately and without installing anything.
- No upload
- No watermark
- No file size limit
- Hardware accelerated
Drop videos here to convert them
MP4, MOV, WebM, MKV, AVI and more · no size limit or watermark
Processed on your device. Your videos are never uploaded.
Advanced: codec, frame rate, audio, trim
How to convert 3GP videos to MP4
- 1
Copy the videos to your device
Transfer the .3gp or .3g2 files from the old phone, memory card or backup to your computer or phone.
- 2
Add them here
Drop the files onto the tool. The preset converts them to MP4 with H.264 video and AAC audio.
- 3
Convert
Newer 3GP files are converted with hardware acceleration; older ones use the compatibility engine, which downloads once (about 30 MB).
- 4
Download your MP4s
Save them one by one or download the whole set as a ZIP.
What is a 3GP file?
3GP is a container defined for 3G mobile phones and used by countless feature phones and early smartphones. It is a close relative of MP4, but the videos inside usually use codecs designed for tiny screens and slow networks: H.263 or MPEG-4 Part 2 video and AMR audio.
Most modern phones, editors and websites don’t play AMR audio or H.263 video, which is why old phone clips show up silent or refuse to open.
Two paths, chosen automatically
If a 3GP file already contains H.264 video, your browser can usually decode it, and the conversion then uses your device’s hardware video encoder, which is fast. For H.263 video or AMR audio, Asset Compressor automatically switches to its FFmpeg-based compatibility engine, which runs in software on your device.
Either way the result is a standard MP4 that plays on iPhone, Android, Windows, macOS and smart TVs.
Low resolution is normal
Old phone videos are often just 176 × 144 or 320 × 240 pixels. Converting keeps that resolution, because enlarging adds no detail – it only makes files bigger. The converted video will look the same as it did on the phone, just in a format that works today.
Frequently asked questions
Why does my 3GP video have no sound?
It probably uses AMR audio, which most players no longer support. Converting to MP4 re-encodes the audio to AAC, so the sound comes back.
Can I convert 3GP to MP4 on my phone?
Yes, in Chrome on Android or Safari on iPhone and iPad (iOS 16.4 or newer). Files that need the compatibility engine convert faster on a computer.
Are 3G2 files supported?
Yes. 3G2 is the CDMA variant of 3GP and is handled the same way.
Is anything uploaded?
No. Your videos are converted entirely in your browser.
Related tools
AVI to MP4
AVI files from old cameras, DivX and Xvid downloads or Windows-era recordings often won’t play on phones or in browsers. Convert them to MP4 right on your device.
MOV to MP4
iPhones and QuickTime save videos as MOV. Turn them into MP4 files that play on Windows, Android and every website – usually without re-encoding.
Video converter
Change a video’s format in seconds. When the codecs allow it, the streams are copied without re-encoding, so the quality stays exactly the same.
Compress video
Shrink MP4, MOV, WebM and MKV files on your own device with hardware-accelerated encoding. Choose a quality level or an exact target size – no upload, no watermark.
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