Convert MKV to 3GP

Tested on Windows 11, 24 October 2026

Convert MKV video to 3GP in your browser or in the Filoshi app for Windows. The picture and sound are re-encoded with FFmpeg at a high-quality setting, and the original file is never changed. Nothing is uploaded.

Get Filoshi · $29Many files at once, no size limit, on Windows.

How to convert MKV to 3GP in your browser

  1. 1
    Drop your MKV file
    Drag it onto Filoshi above, or press Choose your MKV file to pick it on your computer.
  2. 2
    Filoshi converts it
    3GP is chosen already. FFmpeg, compiled to WebAssembly, converts it inside this browser tab.
  3. 3
    Save your 3GP file
    Download it when it is ready. Nothing was sent to a server.
Source format

What is MKV?

Matroska Video (.mkv). MKV is an open container that can hold almost any video and audio codec, several audio tracks, subtitles and chapters in one file. It is popular for films and series, but iPhones, iPads and some smart TVs do not play it without extra apps.

Common use: Films with several audio tracks or subtitles, archiving recordings

Output format

What is 3GP?

3GPP Multimedia (.3gp). 3GP is the video format defined for 3G mobile phones. Phones of the 2000s recorded small, low-resolution 3GP clips with H.263 or H.264 video and AMR or AAC sound, so many old phone videos are in this format.

Common use: Videos from older mobile phones

Questions about MKV to 3GP

Is converting MKV to 3GP free?
Yes, one file at a time: the converter on this page runs in your browser, files up to 200 MB, no sign-up. The Filoshi desktop app ($29 once, for Windows) converts many files at once and has no size limit.
Does converting MKV to 3GP lose quality?
Yes, a little. 3GP is a lossy format, so some detail is thrown away when the file is saved. Filoshi re-encodes the video at a high-quality setting, so the difference is usually hard to see. MKV is lossy too, so this is a second round of compression; convert from the original, not from earlier conversions.
Is my MKV file uploaded anywhere?
No. The converter on this page runs in your browser with FFmpeg compiled to WebAssembly; your MKV file is read and converted on your device and never sent to a server. The desktop app works the same way, offline.
Has MKV to 3GP been tested?
Yes. MKV to 3GP is one of the 1,841 conversions that passed Filoshi's automated test matrix on Windows 11.
Can I convert many MKV files at once?
Yes, in the desktop app. Drop as many MKV files as you like on the window, pick 3GP once for all of them, and each file shows its own progress. The new files appear next to the originals, which are never changed.

Related conversions

Other MKV conversions

MKV to MP4MKV to WEBMMKV to MOVMKV to AVIMKV to FLVMKV to TSMKV to OGVMKV to F4V

Convert to 3GP

MP4 to 3GPMOV to 3GPAVI to 3GPWEBM to 3GPFLV to 3GPWMV to 3GPM4V to 3GPMPG to 3GP

Need MKV to 3GP for many files?

The browser converter handles one file at a time. The Filoshi app for Windows converts as many as you drop, runs offline, and has 1,841 tested conversions.

Get Filoshi · $29