Konverter MP4 til MKV

Convert MP4 videos to MKV online. Free, fast, and no signup required.

Eller slipp filer her. Maksimal filstørrelse er 1 GB.

Velg en fil før du konverterer.

Inndataformat

MP4 video

MP4 is the most common video container for phones, cameras, browsers, social apps, and downloads. It is widely compatible, but some workflows need MKV for broader track, subtitle, or archive support.

Utdataformat

MKV video

MKV is a flexible video container often used for high-quality video, subtitle tracks, multiple audio streams, and media library archiving. Convert MP4 to MKV when your player, editor, or storage workflow expects Matroska video.

How to convert MP4 to MKV online

Use this MP4 to MKV converter when you need a Matroska video file for playback, archiving, subtitle workflows, or media libraries. Upload your MP4, keep MKV selected as the output, and download the converted video when processing is complete.

The converter works in your browser with no account and no software install. Files up to 1 GB are supported, and uploaded files are processed securely for the conversion flow.

  1. 1 Upload your MP4 video file.
  2. 2 Choose MKV as the output format.
  3. 3 Open settings if you need to adjust codec, quality, bitrate, resolution, or audio options.
  4. 4 Click Convert to start the MP4 to MKV conversion.
  5. 5 Download your MKV video when processing is complete.

If you need the most universally playable file for phones, browsers, or social uploads, MP4 is usually the safer target. If you need a flexible archive or player-friendly container, MKV can be a better fit.

MP4 to MKV FAQ

Is this MP4 to MKV converter free?

Yes. Convertr lets you convert MP4 to MKV online for free with no registration, no watermark, and no software install.

Why convert MP4 to MKV?

MKV is useful for media libraries, subtitle workflows, multi-track video files, and players that prefer the Matroska container. Convert MP4 to MKV when compatibility with those workflows matters.

Can I convert large MP4 files to MKV?

Yes. You can upload MP4 videos up to 1 GB per file. This helps with longer recordings, downloads, exports, and media library files.

Will MP4 to MKV reduce video quality?

Quality depends on the conversion settings and source file. Use higher quality settings when preserving detail matters more than creating a smaller output file.

Are my MP4 files private?

Files are processed securely for conversion and automatically deleted after the conversion flow. You do not need to create an account.

Related video conversion tools

Use these focused video converters when you need another common container, MP4 export, or compatibility workflow.

MKV til MP4 MP4 til WEBM MP4 to AVI MP4 to MOV WEBM til MP4 Videokonverter

Hva skjer når MP4 blir til MKV

Kildeformat

MP4 is a widely supported media container, commonly carrying H.264 or H.265 video and AAC audio.

Målformat

MKV is a flexible Matroska container that can carry multiple audio, video, and subtitle tracks.

Hva endres

The MP4 container is read and the selected video and audio streams are written into a MKV container.

Codecs may be transcoded even when the visible resolution and duration stay the same.

Hva bevares
Duration, frame order, and visible dimensions are preserved unless you select trimming, frame-rate, or resolution changes.
Hva kan gå tapt
Extra subtitle, attachment, chapter, or alternate audio tracks may be omitted when the target container or selected settings do not support them.
Konsekvenser for kodek og kvalitet
Container names do not guarantee a codec. Quality and compatibility depend on the selected video codec, audio codec, bitrate, frame rate, and resolution.
Praktiske begrensninger
A valid MP4 extension does not guarantee that every codec inside the container is decodable. Corrupt, encrypted, or unusual streams can fail.

Konverteringstrinn

  1. Last opp en MP4-fil på maksimalt 1 GB.
  2. Kontroller at MKV er valgt som målformat.
  3. Åpne innstillingene hvis du trenger å endre kodek, kvalitet, bithastighet, bildefrekvens, oppløsning eller lydvalg.
  4. Start konverteringen. En frisk og kompatibel arbeider begynner behandlingen umiddelbart.
  5. Last ned MKV-filen og kontroller resultatet før du sletter kildefilen.

Feilsøking

MP4-filen avvises eller kan ikke åpnes.
Kontroller at filen ikke er tom, passordbeskyttet eller skadet, og at det faktiske formatet samsvarer med filtypen.
MKV-filen er større enn forventet.
Velg en mer effektiv kodek eller lavere kvalitetsinnstilling når det er tilgjengelig. Formater uten kvalitetstap og ukomprimerte formater er ofte større av natur.
Resultatet har ingen lyd eller kan ikke spilles av.
Prøv en målkodek med bred støtte, og kontroller at kilden inneholder en dekodbar lydstrøm.

Personvern og fillagring

Opplastede og konverterte filer behandles automatisk og slettes permanent innen 24 timer. Du kan slette dem tidligere med slettekontrollen. Convertr leser, analyserer, selger eller gjennomgår ikke filinnholdet manuelt.

Les personvernerklæringen

Nyttige alternativer

MP4 til AAC Bruk dette når AAC passer bedre til appen, kodeken eller redigeringsarbeidsflyten du trenger. MP4 til AIFF Bruk dette når AIFF passer bedre til appen, kodeken eller redigeringsarbeidsflyten du trenger. MKV til MP4 Use the reverse conversion when you need to return to the original format family.