Step 1: Drop your MKV 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 3GP files.
MKV to 3GP Conversion FAQ
How do I convert an MKV file to 3GP?
+
Upload your MKV file using the picker above and the converter detects the source type and runs the MKV → 3GP pipeline. The result downloads automatically when conversion completes; no account needed for one-off conversions.
What happens to the subtitle tracks in my MKV file?
+
They cannot stay selectable, because 3GP has no soft-subtitle stream to hold them. There are two ways out: burn them into the video during conversion, which makes them permanent and unstyleable, or export them as a separate .srt alongside the 3GP for the player to load. The converter tells you which it did rather than dropping them silently. 3GP is capped at low resolutions and mono speech-grade audio; upscaling it will not restore detail that was never captured.
My MKV has several audio tracks — do they all survive into the 3GP?
+
Not dependably. MKV stores multiple audio streams as first-class tracks, but 3GP playback support past the first track is inconsistent, so most players will only ever expose one. Choose the track you actually want before converting; the others are better extracted to their own files than left in a container that hides them. MKV is the archival container of choice because it stores unlimited audio tracks, soft subtitles, chapter markers and cover art in one file.
What happens to 5.1 surround audio when converting MKV to 3GP?
+
It is downmixed to stereo, because 3GP has no dependable multichannel path. The fold-down uses the standard ITU coefficients so dialogue in the centre channel stays intelligible and the surrounds come in at reduced level rather than vanishing. Anything that relied on discrete channel placement is gone after that.
Both MKV and 3GP are modern containers — which should I actually keep?
+
Keep whichever matches where the file is going, because neither is better in the abstract. One of these two is built for playback compatibility and the other for holding everything a file might contain, and they trade against each other exactly along that line. The pragmatic answer for most libraries is to archive in the feature-rich container and export to the compatible one on demand. 3GP files are tiny and decode on the weakest hardware imaginable, which is why feature phones and low-end handsets still record it.
Is the MKV to 3GP converter free?
+
Yes — basic MKV → 3GP conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.
How big an MKV file can I convert to 3GP?
+
Free accounts: up to 100 MB per MKV file. Premium: typically 1 GB per file, depending on the MKV source type. Very large files are split into chunks server-side when the 3GP format allows.
Will conversion change the content of my MKV?
+
Conversion preserves all information that both MKV and 3GP can represent. Format-specific features that the 3GP 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 MKV files to 3GP at once?
+
Yes — drop multiple MKV 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 MKV to 3GP converter work on phones and tablets?
+
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 MKV to 3GP converter support?
+
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 MKV files kept private?
+
Yes — uploaded MKV files are processed in isolated workers and deleted within minutes. We never view, retain, or share content. See /privacy/ for the data-retention window.
