3GP is a stripped-down MP4 built for early mobile networks, so files are small but resolution and audio quality are limited.
Common Uses
Mobile video
3G streaming
Phone video
3GP Conversion FAQ
What is a 3GP file?
+
3GP is a multimedia container format designed for 3G mobile phones.
Why will my browser not play a 3GP file?
+
Browsers ship decoders for a deliberately short list of formats, and 3GP is not on it — the licensing, the codec variety it permits, or simply its age keeps it out. The file is not broken and a desktop player will open it, but nothing you do to the page will make a browser render it. Converting to a web-native container is the only reliable route to inline playback. 3GP is capped at low resolutions and mono speech-grade audio; upscaling it will not restore detail that was never captured.
Will 3GP play on a phone or TV without flattening the battery?
+
Usually yes, because the chips in phones, tablets and televisions decode this kind of payload in dedicated silicon rather than on the main processor. That is the difference between a video that plays cool for two hours and one that heats the device and drains it in forty minutes. Where the format falls down is app support rather than decoding — the codec is fine, the wrapper is what a gallery app may refuse. 3GP holds H.263 or MPEG-4 Part 2 video with AMR narrowband speech audio, all tuned for minimal bitrate rather than quality.
Should I still be saving new files as 3GP?
+
Only if something downstream demands it. The format still opens, and there is no urgency about converting an archive that is not causing trouble, but it is no longer where the tooling or the efficiency is going. For anything new, a current format costs nothing extra and avoids the next round of this question a few years from now.
Where do subtitles go for a 3GP file?
+
Beside it, or into the picture. 3GP has no subtitle stream of its own, so the two options are a sidecar .srt file the player loads alongside the video, or burning the text into the frames during a re-encode. The sidecar keeps the subtitles editable and switchable but travels as a second file that is easy to lose; burning in survives any transfer but cannot be turned off afterwards.
Why does only one audio track survive in my 3GP?
+
Because that is all the format dependably carries. Extra audio streams can be written into a 3GP, but playback support past the first one is inconsistent enough that most tools simply keep one and discard the others. If the source had a commentary or a second language, extract those to separate audio files rather than trusting them to a container that hides them.
Does using 3GP require a patent licence?
+
Not for you. The codecs involved are covered by patent pools, and the licensing is settled by the people who ship decoders — the phone, the browser, the operating system — long before a file reaches you. It is why the format is everywhere in hardware and why royalty-free alternatives exist at all, and it changes nothing about converting a file you already have.
Is the audio in a 3GP limited to stereo?
+
In practice yes. The format was specified around one or two channels, so a surround mix has to be folded down to stereo to fit — which is fine for headphones and phone speakers and wrong for anything heading to a home cinema receiver. If the source has a multichannel mix worth keeping, convert into a container that carries it rather than letting the downmix happen silently.
Can I just rename the extension instead of converting 3GP?
+
Almost never, and it is worth understanding why: the extension is a label, while the bytes inside are structured for one specific format. Renaming produces a file whose name promises something its contents do not deliver, and whatever opens it either refuses the file or misreads it. The one narrow exception is two formats that are genuinely the same container under different names — and even then a proper rewrap is safer than a rename.
What happens to my 3GP file after the conversion?
+
It is deleted automatically. The upload and the converted result stay on our servers for about 24 hours, which leaves time to download the result, and are then removed by an automatic cleanup. The transfer runs over HTTPS in both directions. Nobody reads the contents, nothing is indexed, and nothing is passed to anyone else.
How long does converting a 3GP take?
+
Usually seconds. Small files are effectively instant, and the cases that take real time are the ones doing real work: a long recording that has to be re-encoded frame by frame, a scanned document going through character recognition, or a very large batch. Where a conversion only rewraps or repackages the existing data it stays fast no matter how big the file is, because nothing is being decoded.
What is the best way to address 3GP files?
+
Upload your file by dragging it onto the page or clicking to browse, choose the output format, then start the conversion. The converted file is ready to download when it finishes.
