Slimvid

Preset · MKV to MP4 · stays on device

Convert MKV to MP4 Online

Remux a downloaded MKV into MP4 so phones, editors and chat apps will play it.

Rilascia qui i video o clicca per sfogliare

Fino a 1GB ciascuno · MP4, MOV, WebM, MKV, AVI, WMV e oltre 30 altri

Scegli i file

Elaborato in locale nel tuo browser. Non viene caricato nulla.

Settings

Add a video and the settings for this tool appear here.

How it works

  1. 1Drop the .mkv file.
  2. 2Leave the output on MP4.
  3. 3Convert and download. Remux is instant when the codec already fits.

Processed locally in your browser. Nothing is uploaded.

Elaborato in locale nel tuo browser. I file non lasciano mai il tuo dispositivo. Fino a 1GB: per file più grandi c’è l’app desktop.

MKV is a wrapper, not a codec

MKV can hold almost anything: H.264, HEVC, VP9, multiple audio tracks. Phones and many editors only want MP4 with H.264 plus AAC.

When the video is already H.264, we remux into MP4 without touching the picture. That is why a 2GB MKV can become an MP4 in seconds.

If the codec cannot live in MP4, we transcode with the hardware encoder. Extra subtitle tracks are not copied — burn them in an editor first if you need them.

What you get

Input
MKV
Output
MP4 (H.264 when transcoding)
Subtitles
Not copied; remux video/audio

Tre passaggi

How to convert MKV to MP4

Nessuna registrazione, nessuna coda di upload, nessuna filigrana. Tutto avviene sul tuo dispositivo.

  1. 1

    Rilascia il file

    Drop the .mkv file.

  2. 2

    Scegli le impostazioni

    Leave the output on MP4.

  3. 3

    Scarica

    Convert and download. Remux is instant when the codec already fits.

Same job, other limits

Related size and platform pages

Convert MOV to MP4 OnlineTurn iPhone and camera MOV files into an MP4 that actually plays in browsers, Discord and slides.MOV → MP4Convert AVI to MP4 OnlineTurn old camera and screen-recorder AVI files into an MP4 that phones and browsers can play.AVI → MP4Convert WebM to MP4 OnlineTurn browser recordings and VP8/VP9 WebM files into MP4 for iPhone, Premiere and chat apps.WebM → MP4Convert MP4 to WebM OnlineMake a web-native WebM from an MP4 for HTML5 pages, Chrome recordings and lightweight embeds.MP4 → WebM

Continua

Strumenti correlati

FAQ

MKV to MP4 FAQ

App desktop

File oltre 1GB? Passa al desktop.

La versione browser è perfetta per le clip di tutti i giorni. Quando devi elaborare filmati enormi o decine di file, l’app desktop lo fa più velocemente sul tuo hardware.

Ottieni l’accesso anticipatoConfronta web e desktop
  • Nessun limite di dimensione: 4K, registrazioni di un’ora, qualsiasi cosa
  • Code batch: rilascia una cartella, applica un preset
  • Codifica con accelerazione hardware (H.264 / H.265)
  • Funziona completamente offline, stessa garanzia di privacy