Convertidor de MP4 a MKV

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

O arrossega els fitxers aquí. Mida màxima per fitxer: 1 GB.

Tria un fitxer abans de convertir.

Format d'entrada

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.

Format de sortida

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.

Què passa quan MP4 es converteix en MKV

Format d'origen

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

Format de destinació

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

Què canvia

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.

Què es conserva
Duration, frame order, and visible dimensions are preserved unless you select trimming, frame-rate, or resolution changes.
Què es pot perdre
Extra subtitle, attachment, chapter, or alternate audio tracks may be omitted when the target container or selected settings do not support them.
Efectes del còdec i la qualitat
Container names do not guarantee a codec. Quality and compatibility depend on the selected video codec, audio codec, bitrate, frame rate, and resolution.
Limitacions reals
A valid MP4 extension does not guarantee that every codec inside the container is decodable. Corrupt, encrypted, or unusual streams can fail.

Passos de conversió

  1. Puja un fitxer MP4 de fins a 1 GB.
  2. Confirma que MKV està seleccionat com a format de destinació.
  3. Obre la configuració si necessites canviar el còdec, la taxa de bits, el volum o la retallada de l’àudio.
  4. Inicia la conversió. Un servidor compatible i en bon estat començarà a processar-la immediatament.
  5. Descarrega el fitxer MKV i comprova el resultat abans d’eliminar l’original.

Resolució de problemes

El fitxer MP4 es rebutja o no s’obre.
Comprova que el fitxer no sigui buit, protegit o malmès i que el format real coincideixi amb l’extensió.
El fitxer MKV és més gran del que esperaves.
Tria una taxa de bits més baixa si necessites un fitxer més petit. Recorda que això pot reduir la qualitat de l’àudio.
The result has no sound or will not play.
Try a broadly supported target codec and verify that the source contains a decodable audio stream.

Privacitat i retenció de fitxers

Les pujades i els fitxers convertits es processen automàticament i s’eliminen de manera irreversible en un màxim de 24 hores. Pots eliminar-los abans amb el control de supressió. Convertr no llegeix, explota, ven ni revisa manualment el contingut dels fitxers.

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