Convert MKV to 3GP
Convert MKV files to 3GP locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
Upload FilesPlatform Statistics
How to convert MKV to 3GP
- Drop your .mkv files above, or click Upload Files. You can add many files at once.
- 3GP is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .3gp files as soon as each one finishes.
What to know about MKV to 3GP conversion
- The video is re-encoded to H.264 (baseline) video and AAC audio so it plays wherever 3GP is supported, and odd frame sizes are adjusted automatically.
- You can change the resolution, frame rate, playback speed and quality (CRF) before converting.
MKV vs 3GP
| Feature | MKV (Matroska Video) | 3GP (3GPP Multimedia) |
|---|---|---|
| Codecs used by PureConverter | H.264 video and AAC audio | H.264 (baseline) video and AAC audio |
| Best for | movies with several audio and subtitle tracks | old mobile phones and very low-bandwidth sharing |
| Opens in | VLC, mpv and most media players, Plex and most smart TVs | VLC, mpv and most media players and most phones |
MKV (Matroska Video): A flexible, open-standard video container format that can hold unlimited video, audio, picture, or subtitle tracks.
3GP (3GPP Multimedia): A lightweight video container designed for mobile phones and low-bandwidth networks.
Conversion options
- Resolution: original, 1080p, 720p, 480p or 360p
- Frame rate and playback speed (0.5× to 2×)
- Quality presets or a custom CRF value, and lossless mode
- Audio bitrate, sample rate and channels
Frequently asked questions
Is it safe to convert MKV to 3GP here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several MKV files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert 3GP to MKV.
Convert MKV to other formats
- MKV to MP4
- MKV to MP3
- MKV to WEBP
- MKV to GIF
- MKV to WAV
- MKV to MOV
- MKV to M4A
- MKV to FLAC
- MKV to WEBM
- MKV to AAC
- MKV to OGG
- MKV to OPUS
Convert other formats to 3GP
- MP4 to 3GP
- MOV to 3GP
- WEBM to 3GP
- AVI to 3GP
- WMV to 3GP
- FLV to 3GP
- M4V to 3GP
- MPEG to 3GP
- TS to 3GP
- OGV to 3GP
See every MKV converter and 3GP converter, or browse the full converter directory.