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MKV File Format

Matroska Video category

MKV (Matroska) is the open container of choice for HD movies: it holds virtually any video/audio codec plus subtitles and chapters in one file.

Typical use: MKV is ideal for archiving movies with multiple audio tracks and subtitles intact.

About the MKV format

MKV (Matroska) is the open container that refuses to say no: virtually any video codec, multiple audio tracks, multiple subtitle streams, chapters, attachments and menu structure in one file. It became the de facto standard for movie rips, anime releases and personal archives precisely because nothing needs to be thrown away.

The same generosity is its compatibility risk: smart players (VLC, mpv) handle everything, but smart TVs, consoles and car systems choke on exotic codec combinations inside MKV. It is also not a streaming standard, so web delivery runs through its subset, WebM.

Strengths

  • ✓ Unlimited tracks: audio, subtitles, chapters, attachments
  • ✓ Open specification, no licensing
  • ✓ Ideal archival container — nothing is lost

Limitations

  • ✗ Device playback is hit-or-miss outside smart players
  • ✗ Not web/streaming native
Compression
Any codec inside
Quality
Preserved as-is
Compatibility
Players excellent, devices mixed
Best for
Collections and multi-track video

Convert MKV to…

25 direct directions plus 46 workflows, sorted A–Z; 🔥 marks popular targets.

MKV to 3G2 MKV to 3GP MKV to APNG MKV to ASF MKV to AVI Hot MKV to DV MKV to F4V MKV to FLV MKV to GIF Hot MKV to H.264 MKV to M2TS MKV to M4V Hot MKV to MOV Hot MKV to MP4 Hot MKV to MPEG MKV to MPEG1 MKV to MPEG2 MKV to MPEG4 MKV to MPG MKV to TS MKV to VOB MKV to WEBM Hot MKV to WebP Hot MKV to WMV MKV to Y4M

Cross-engine workflows

MKV to 7Z MKV to AAC MKV to AC3 MKV to AIF MKV to AIFF MKV to ALAC MKV to APK MKV to AU MKV to CAF MKV to E-AC3 MKV to F4A MKV to F4B MKV to FLAC MKV to GSM MKV to JAR MKV to JFIF MKV to JPE MKV to JPEG MKV to JPG MKV to M4A MKV to M4B MKV to M4R MKV to MP2 MKV to MP3 MKV to OGA MKV to OGG MKV to OPUS MKV to PCM MKV to PNG MKV to PNG24 MKV to PNG8 MKV to TAR MKV to TAR.BZ2 MKV to TAR.GZ MKV to TAR.XZ MKV to TBZ2 MKV to TGZ MKV to TTA MKV to TXZ MKV to VOC MKV to W64 MKV to WAV MKV to WAVPCM MKV to WIM MKV to WV MKV to ZIP

Convert other files to MKV…

3G2 to MKV 3GP to MKV ASF to MKV AVI to MKV Hot DivX to MKV DV to MKV F4V to MKV FLV to MKV GIF to MKV Hot H.264 to MKV M1V to MKV M2TS to MKV M2V to MKV M4V to MKV Hot MJPEG to MKV MOV to MKV Hot MP4 to MKV Hot MPEG to MKV MPEG1 to MKV MPEG2 to MKV MPEG4 to MKV MPG to MKV MTS to MKV MXF to MKV OGV to MKV RM to MKV RMVB to MKV TS to MKV VOB to MKV WEBM to MKV Hot WMV to MKV WTV to MKV Xvid to MKV Y4M to MKV

Cross-engine workflows

AAC to MKV AC3 to MKV AIF to MKV AIFF to MKV ALAC to MKV AMB to MKV AMR to MKV APE to MKV AU to MKV AVR to MKV CAF to MKV CVS to MKV CVU to MKV DSS to MKV DTS to MKV E-AC3 to MKV F32 to MKV F4A to MKV F4B to MKV F64 to MKV FAP to MKV FLAC to MKV FSSD to MKV GSM to MKV GSRT to MKV HCOM to MKV HTK to MKV IRCAM to MKV M4A to MKV M4B to MKV M4R to MKV MAUD to MKV MOD to MKV MP2 to MKV MP3 to MKV OGA to MKV OGG to MKV OMA to MKV OPUS to MKV PAF to MKV PVF to MKV QCP to MKV S16 to MKV S24 to MKV S32 to MKV S3M to MKV SD2 to MKV SHN to MKV SMP to MKV SNDR to MKV SNDT to MKV SPX to MKV TAK to MKV TTA to MKV TXW to MKV U8 to MKV VMS to MKV VOC to MKV VQF to MKV W64 to MKV WAV to MKV WAVPCM to MKV WMA to MKV WV to MKV WVE to MKV XI to MKV XM to MKV

Frequently asked questions

What is a MKV file?

MKV (Matroska) is the open container of choice for HD movies: it holds virtually any video/audio codec plus subtitles and chapters in one file.

How do I convert MKV files online?

Pick a target format from the "Convert MKV to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.

Is it safe to convert MKV files here?

Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.

Which formats can MKV convert to?

This page lists all 71 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.