How to convert 3GP to Matroska (MKV)
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert 3GP to Matroska (MKV)
NexMedia converts 3GP to Matroska (MKV) on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About 3GP
3GP is a container format defined by the 3GPP for mobile phones. It is a simplified relative of MP4 that typically holds H.263 or H.264 video with AMR or AAC audio.
Videos recorded on older mobile phones, especially before smartphones.
3GP videos are usually low resolution and heavily compressed, and converting them cannot add detail.
Convert 3GP to MKV online free, no account required — MKV is a flexible open container for video with any number of audio and subtitle tracks.
Change 3GP to MKV without losing quality — convert 3GP to MKV free in your browser.
Why is the video from my old phone so tiny and pixelated? 3GP was built for small low-resolution phone screens on slow mobile networks, so there is no detail in the file to recover — the source simply never had it.
About Matroska (MKV)
Matroska (MKV) is an open container format that can hold almost any video and audio codec, any number of audio and subtitle tracks, chapters and attachments.
It is popular for films and series with several audio languages and subtitle tracks, and for archiving video.
Many phones, browsers and TVs do not play MKV files directly, even when they support the codecs inside.
Why convert video to MKV? When one file must carry several audio languages, subtitle tracks and chapters, no container holds them as flexibly.
What changes when you convert 3GP to MKV
- The 3GP is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
Settings you can change
Before you convert 3GP to MKV, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted MKV file is kept for 2 hours, then deleted.
3GP to MKV: questions and answers
Does converting 3GP to MKV reduce quality?
The 3GP is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
What is the difference between 3GP and MKV?
3GP is an older mobile-phone video format. MKV is a flexible open container for video with any number of audio and subtitle tracks.
Can I change the settings when converting 3GP to MKV?
Before you convert 3GP to MKV, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Do I need an account to convert 3GP to MKV?
No. You can convert 3GP to MKV without an account; signing in raises the file-size and daily limits.
How long is my converted MKV file kept?
The MKV file you convert from 3GP is kept for 2 hours, then deleted automatically.
When I convert 3GP to MKV, is the video re-encoded?
The 3GP is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
Will converting 3GP to MKV change my original file?
No. The conversion reads your 3GP and writes a new MKV file, leaving your original 3GP file untouched.