Convert 3GPP Multimedia (.3gp) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .3gp file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
3GP is the mobile video container from the 3GPP consortium, limited to H.263/MPEG-4/H.264 video and AMR/AAC audio. MKV (Matroska Video), created by Steve Lhomme and a community of open-source developers, is the most flexible multimedia container in existence — it supports virtually every video codec (H.264, H.265, VP9, AV1), every audio codec (AAC, FLAC, DTS, TrueHD), multiple subtitle tracks, chapter markers, and attachments. Converting 3GP to MKV opens up maximum flexibility for editing, archival, and playback.
MKV is the preferred format for media archivists and power users because it places no restrictions on the codecs or features you can use. Converting 3GP to MKV lets you add subtitle tracks, chapter markers, multiple audio streams, and rich metadata that the 3GP container cannot support. MKV is the standard container for high-quality video on VLC, Plex, Kodi, Jellyfin, and most Linux media players. If you plan to re-encode the video later, MKV provides maximum flexibility for the intermediate file.
FFmpeg remuxes or transcodes the 3GP content into a Matroska container. If the source video is H.264, it can be stream-copied without re-encoding. H.263 video is typically transcoded to H.264 or H.265 for better compatibility. Audio is converted from AMR to AAC or FLAC depending on the use case. The MKV container adds a CRC32 checksum to each cluster for data integrity verification, and supports ordered chapters, tags, and segment linking.
When stream-copying H.264 video, quality is bit-identical. When transcoding H.263 to H.264, quality improves at equivalent file sizes due to H.264's superior compression efficiency. MKV itself is just a container — it adds no compression or quality change beyond what the chosen codecs provide. Audio converted from AMR to AAC or FLAC will sound noticeably better.
| Device | 3GP | MKV |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
3GP to MKV conversion gives you the most versatile container available, supporting any codec combination and unlimited metadata for professional archival and playback scenarios.
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Funcționează oriunde
| No |
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| Caracteristică | 3GP | MKV |
|---|---|---|
| Nume complet | 3GPP Multimedia | Matroska Video |
| Extensie | .3gp | .mkv |
| Cel mai potrivit pentru | Mobile optimized | Multiple audio tracks |