Add your 3GP file
Drop one or more .3gp files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
3GP to MP4
Converting .3gp video to .mp4 means re-encoding the picture and sound into a different container and codec family, and this page does it entirely in your browser. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop 3GP files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting 3GPP video to MP4 video
Converting .3gp video to .mp4 means re-encoding the picture and sound into a different container and codec family, and this page does it entirely in your browser. A .3gp file is a lightweight container defined by the 3GPP standards body for video recorded and shared on mobile phones. It packs low-bitrate video and compressed speech with minimal overhead, which made .3gp the format of MMS messages and early camera phones.
An .mp4 file is a multimedia container that bundles compressed video, audio, subtitles, and chapter data into a single stream-friendly package. It is the default delivery format for nearly every phone, camera, and video platform, which makes .mp4 the safest target when a clip has to play everywhere. For this route the practical draw is plays natively in every modern browser, operating system, and mobile device and streams efficiently once faststart or fragmentation is applied — balanced against fewer track, attachment, and chapter features than Matroska, which is worth knowing before you commit a large batch.
Why convert 3GP to MP4?
The practical trigger for this conversion is usually a mismatch: with .3gp, picture quality is poor by any modern standard. Switching to .mp4 buys you plays natively in every modern browser, operating system, and mobile device, which is why it is the better fit for publishing video to the web, social media, or a client who has not specified a format. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
3GP vs MP4 at a glance
| Aspect | 3GPP video (.3gp) | MP4 video (.mp4) |
|---|---|---|
| Format type | Container — quality depends on the codecs and settings inside | Container — quality depends on the codecs and settings inside |
| How it stores data | iSO base media structure like MP4, but with a deliberately restricted codec list | typically carries H.264/AVC or H.265/HEVC video with AAC audio, though the box structure also accepts AV1, MP3, and timed-text tracks |
| Strongest at | recovering videos from old feature phones and their memory cards | publishing video to the web, social media, or a client who has not specified a format |
| Weak spot | picture quality is poor by any modern standard | fewer track, attachment, and chapter features than Matroska |
| Metadata | a small set of 3GPP-defined asset atoms for title, author, and location exists, though most recording phones never wrote them | iTunes-style metadata atoms (title, artist, cover art) plus XMP and per-track language tags; ID3 is not native to the container |
Pick MP4 as the output
Select .mp4 in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if MP4 is selectable, the route is real and validated.
Convert on your device
Press Convert. The conversion runs on an FFmpeg engine compiled to WebAssembly, executing entirely inside your browser tab.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid MP4 file. Outputs keep the original filename with the .mp4 extension.
3GP to MP4 questions, answered
Will converting 3GP to MP4 lose quality?
Both sides are re-encoded, so expect a small generation loss controlled by the quality setting: 3gp is container-oriented and mp4 is container-oriented. For visually or audibly transparent results keep quality high; for smaller files lower it and compare.
Is it private to convert 3GP files here?
Yes — the .3gp file is processed inside your browser tab and never uploaded. The conversion runs on an FFmpeg engine compiled to WebAssembly, executing entirely inside your browser tab. Close the tab and the file is gone from memory.
Where will the MP4 file work?
Every current browser, including Chrome, Firefox, Safari, and Edge, plays H.264 .mp4 files without plugins, and hardware decoding is ubiquitous on phones and televisions. Files using HEVC inside the container are the main exception: Apple devices handle them well, while Firefox depends on the operating system's decoder.
Will the MP4 file be bigger or smaller than my 3GP?
It depends on the content: typically carries H.264/AVC or H.265/HEVC video with AAC audio, though the box structure also accepts AV1, MP3, and timed-text tracks. Convert one representative file first and compare before batch-processing a large set.
What happens to the metadata in my 3GP file?
This converter strips container metadata deliberately (the FFmpeg command runs with metadata mapping disabled) so exported files do not leak recording details. In the source, a small set of 3GPP-defined asset atoms for title, author, and location exists, though most recording phones never wrote them; none of it is transmitted anywhere because the file never leaves your browser.
Can I convert MP4 back to 3GP?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .3gp → .mp4 → .3gp is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.