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format

MKV

MKV is an open container that can hold almost any codec plus unlimited tracks.

Also known as Matroska.

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What is a MKV file?

A flexible open container supporting unlimited video, audio, subtitle and chapter tracks, popular for archiving films.

Technical characteristics

Representation
binary
Compression
H.264, HEVC, AV1, VP9
Lossy
Yes
Open specification
Yes

History and origin

Introduced
2002
Organisation
Matroska project

Compatibility

  • Windowspartial
  • macOSpartial
  • Linuxfull
  • Androidfull

Browsers: None.

Advantages of MKV

  • Any codec, any number of tracks
  • Excellent subtitle and chapter support
  • Open and royalty-free

Limitations to know about

  • Not playable in browsers
  • Limited support on TVs and phones

When to use MKV

  • Film archiving
  • Multi-language releases
  • Home media servers

Convert MKV files

MKV to MP4 is usually a lossless remux when the inside codec is H.264 or HEVC.

Recommended next step

  • Convert to MP4

    When the video inside is already H.264 or HEVC, remuxing MKV into MP4 is lossless, near-instant and makes the file playable on phones, TVs and browsers.

    Trade-offs: Multiple subtitle and audio tracks may need to be dropped.

    Learn about MP4

MKV scores

Deterministic scores calculated from the structured facts above. Identical facts always produce identical scores.

Overall score

58/100

  • Openness score

    100
    • the specification is published openly
    • an openly specified format can be implemented without a licence negotiation

    Confidence 49% · evidence coverage 100%

  • Archiving score

    88
    • the specification is public, so a decoder can always be rebuilt
    • the specification is published openly
    • it is actively maintained and current
    • an openly specified format can be implemented without a licence negotiation

    Confidence 62% · evidence coverage 89%

  • Performance score

    88
    • smaller payloads mean less I/O and faster first paint
    • it compresses lossily, which produces much smaller files than lossless coding

    Confidence 57% · evidence coverage 100%

  • Longevity score

    82
    • it is actively maintained and current
    • the specification is published openly
    • the specification is public, so a decoder can always be rebuilt
    • it does not satisfy: mainstream applications ship support for it

    Confidence 62% · evidence coverage 100%

  • Streaming score

    70
    • smaller payloads mean less I/O and faster first paint
    • lossy compression keeps the bitrate low enough to stream reliably
    • it compresses lossily, which produces much smaller files than lossless coding
    • native browser support is incomplete or undocumented

    Confidence 64% · evidence coverage 100%

  • AI score

    66
    • the specification is published openly
    • smaller payloads mean less I/O and faster first paint
    • only a narrow set of applications handles it
    • lossy artefacts add noise that models can learn by mistake

    Confidence 47% · evidence coverage 100%

  • Web score

    62
    • smaller payloads mean less I/O and faster first paint
    • it compresses lossily, which produces much smaller files than lossless coding
    • the specification is published openly
    • native browser support is incomplete or undocumented

    Confidence 62% · evidence coverage 92%

  • Compatibility score

    44
    • an open specification means cloud SDKs can implement it without licensing friction
    • native browser support is incomplete or undocumented
    • at least one mainstream platform needs extra software

    Confidence 67% · evidence coverage 100%

  • Photography score

    30
    • it compresses lossily, which produces much smaller files than lossless coding
    • each edit-and-save cycle compounds compression damage

    Confidence 52% · evidence coverage 44%

  • Editing score

    13
    • each edit-and-save cycle compounds compression damage
    • only a narrow set of applications handles it

    Confidence 46% · evidence coverage 63%

  • Printing score

    8
    • lossy artefacts become visible when the image is enlarged for print
    • only a narrow set of applications handles it

    Confidence 50% · evidence coverage 50%

What MKV is recommended for

Every conclusion below is derived from the structured facts on this page — nothing is written by hand.

  • Cloud compatibility100/100

    • Because an open specification means cloud SDKs can implement it without licensing friction.
    • Because it converts into many other formats, which suits automated pipelines.

  • Open standards100/100

    • Because the specification is published openly.

  • Licensing100/100

    • Because an openly specified format can be implemented without a licence negotiation.
    • Because the core patents are old enough to have expired.

  • Decode performance100/100

    • Because smaller payloads mean less I/O and faster first paint.
    • Because mature formats benefit from hardware and SIMD-optimised decoders.

  • Future-proofing88/100

    • Because it is actively maintained and current.
    • Because open specifications outlive the companies that create them.
    • Because nothing in the graph supersedes it yet.

  • Long-term archiving76/100

    • Because the specification is public, so a decoder can always be rebuilt.
    • Because it is a current, actively maintained format.
    • Because it has a decade or more of proven, stable implementations.

  • Compression efficiency69/100

    • Because it compresses lossily, which produces much smaller files than lossless coding.
    • Because it defines a documented compression scheme.

What MKV is not recommended for

  • Printing suitability0/100

    • Because lossy artefacts become visible when the image is enlarged for print.
    • Because it does not satisfy: it is a page-description format built around fixed layout.

  • Professional editing0/100

    • Because each edit-and-save cycle compounds compression damage.
    • Because it does not satisfy: professional applications read and write it.

  • Browser compatibility33/100

    • Because native browser support is incomplete or undocumented.

  • Operating system compatibility33/100

    • Because at least one mainstream platform needs extra software.

  • Software compatibility33/100

    • Because only a narrow set of applications handles it.

Successors and legacy considerations

Supersedes: AVI.

Related to MKV

File extensions

Media types

Key concepts

Compared with

Succeeds

Alternatives

Data quality

Every claim on this page is classified as a verified fact, a derived fact or an assumption.

Overall confidence
83%
Verification status
verified
Last reviewed
2026-08-03
Verified facts
2

2 classified claims backed by 1 source.

  • Convert Always editorial review — Convert Always

Sources and review status

Review status: verified · confidence 80%

Last reviewed 2026-08-03 (revision 1).

  • Convert Always editorial review — Convert Always