Step 1: Drop your 3GP files using the button above or by deposit and leave.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Receive your converted MP4 files.
3GP to MP4 Conversion FAQ
How do I convert a 3GP file to MP4?
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Upload your 3GP file using the picker above and the converter detects the source type and runs the 3GP → MP4 pipeline. The result downloads automatically when conversion completes; no account needed for one-off conversions.
Can 3GP be converted to MP4 without re-encoding the video?
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Yes, and it is the fast path. 3GP and MP4 share the same underlying box structure, so the video and audio streams are copied across byte-for-byte and only the container wrapper is rewritten. Nothing is decoded and nothing is re-compressed, so a feature-length file finishes in under a minute instead of half an hour, with output quality identical to the source. 3GP is the container the 3GPP standardised for early mobile phones, when video had to fit a 176x144 screen and a 2G data plan. MP4 is ISO/IEC 14496-14, standardised in 2001 and derived from the same QuickTime box layout MOV uses.
Can I add selectable subtitles once the file is MP4?
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Yes. 3GP has no usable soft-subtitle track, so subtitles for 3GP content had to be burned into the picture or shipped as a separate sidecar file. MP4 carries subtitles as their own selectable stream, so after conversion you can attach an SRT track the viewer can switch on, switch off or restyle. Almost every MP4 in the wild is H.264 video with AAC audio; the container also legally holds HEVC, AV1 and VP9.
Will the MP4 play in a browser when the 3GP would not?
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Yes, and that is usually the whole reason for the conversion. A 3GP embedded in a web page either shows a broken player or forces a download, because browsers ship no decoder for it. MP4 plays inline through the native HTML5 video element with no plugin and no external application. MP4 is the safest possible delivery target — every phone, browser, console, editor and Smart TV built in the last decade plays it without extra software.
Is the 3GP to MP4 converter free?
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Yes — basic 3GP → MP4 conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.
How big a 3GP file can I convert to MP4?
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Free accounts: up to 100 MB per 3GP file. Premium: typically 1 GB per file, depending on the 3GP source type. Very large files are split into chunks server-side when the MP4 format allows.
Will conversion change the content of my 3GP?
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Conversion preserves all information that both 3GP and MP4 can represent. Format-specific features that the MP4 format doesn't support (e.g. vector data in raster output, formulas in plain-text output) are rasterized or stripped — see the format-specific notes on the result page.
Can I convert many 3GP files to MP4 at once?
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Yes — drop multiple 3GP files into the upload zone and they are queued in parallel. Premium has more parallel workers; on a 50-file batch this is the difference between minutes and seconds.
Does the 3GP to MP4 converter work on phones and tablets?
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Yes — the UI is responsive and the conversion pipeline runs server-side, so mobile devices upload-then-download just like desktops. iOS and Android browser file pickers (camera roll, Files app) work end-to-end.
Which browsers does the 3GP to MP4 converter support?
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Chrome, Firefox, Safari (15+), Edge, and Opera. The converter uses standard `<input type="file">` upload — no WebAssembly or PWA dependencies — so even older browsers work.
Are my 3GP files kept private?
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Yes — uploaded 3GP files are processed in isolated workers and deleted within minutes. We never view, retain, or share content. See /privacy/ for the data-retention window.
What if the MP4 download doesn't start automatically?
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Disable any pop-up blocker, then click the download button manually. The result link stays active for 24 hours, so if your network fails mid-download, you can re-trigger from the result page without re-uploading the 3GP.
