How to convert MKV to 3GP
To convert MKV to 3GP, upload your MKV file, choose 3GP as the output format and press Convert. The finished 3GP file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter turns MKV videos into 3GP files in your browser, with no software to install and no watermark. When the video and audio inside your MKV file can be placed in 3GP as they are, the streams are copied without re-encoding, which is faster and keeps the original quality. Otherwise the video is re-encoded as H.264 baseline video (up to 480p) with mono AAC audio.
Reasons to switch from MKV to 3GP
- Very small files
- Plays on feature phones and old smartphones
- Low bandwidth use
- Plays on: Feature phones, Android, VLC and QuickTime
What to expect from this conversion
- Expect a file of similar size to the MKV original.
- To keep files small and playable on phones, 3GP output is limited to 480p with H.264 baseline video and mono audio.
- 3GP is a legacy format. Convert to it only when an older player or device requires it, since MKV is better for everyday use.
- The first audio track is kept. Subtitle tracks, extra audio tracks and chapters are not included in the converted file.
MKV vs 3GP
| Property | MKV | 3GP |
|---|---|---|
| Full name | Matroska Video | 3GPP Multimedia |
| Released | 2002, Matroska.org (open standard) | 1999, 3rd Generation Partnership Project |
| Generation | Modern | Legacy |
| Typical file size | Small | Small |
| Plays on | VLC, Plex, Kodi, most Android players and modern Windows; limited on iOS and older TVs | Feature phones, Android, VLC and QuickTime |
| Best for | movie and TV archives with multiple languages; keeping subtitles inside the file | feature phones and old Android handsets; MMS and tiny shares |
Steps to convert MKV to 3GP
- Drop your MKV video file onto the converter, or click to choose it.
- Check that 3GP is selected as the target and adjust the options if you want.
- Press Convert, then download your new 3GP file when it finishes.
Tips for the best result
- Leave Fast mode on to keep the original quality whenever the streams can be copied.
- Pick a lower resolution if the file is for a phone or messaging app.
- Use Mute if you only need the picture.
Frequently asked questions
How do I convert MKV to 3GP?
Upload your MKV file, make sure 3GP is the selected target and press Convert. When the progress bar finishes, download the 3GP file. No account or software is needed.
Is the MKV to 3GP converter free?
Yes. It is free, with no watermark, no sign-up and no daily limit on how many files you convert. The site is supported by ads.
Will I lose quality when converting MKV to 3GP?
Not necessarily. If the video and audio streams already fit inside 3GP, they are copied without re-encoding, so quality stays identical. If the file has to be re-encoded, the High setting keeps almost all visible detail, while Small trades some detail for a smaller file.
Will the 3GP file be a similar size to my MKV?
Expect a file of similar size to the MKV original. Choosing a lower quality or resolution reduces the size further.
Which devices can play 3GP files?
3GP files play on Feature phones, Android, VLC and QuickTime.
How large a file can I upload?
You can upload videos up to 500 MB. Files are deleted from the server about 30 minutes after conversion.