PureConverter

Convert MKV to AAC

Convert MKV files to AAC locally, completely free and with maximum privacy.

Drag and drop your files here

or click to browse local files (large files supported, limited only by browser RAM)

Upload Files

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How to convert MKV to AAC

  1. Drop your .mkv files above, or click Upload Files. You can add many files at once.
  2. AAC is already selected as the output. Open the settings (gear icon) to fine-tune the result.
  3. Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
  4. Download your .aac files as soon as each one finishes.

What to know about MKV to AAC conversion

  • Only the audio track of the MKV video is kept and encoded as AAC; the picture is discarded.
  • Videos without an audio track cannot be converted to audio.

MKV vs AAC

MKV (Matroska Video): A flexible, open-standard video container format that can hold unlimited video, audio, picture, or subtitle tracks.

AAC (Advanced Audio Coding): A lossy digital audio compression format designed as the successor to MP3, offering higher sound quality at similar bitrates.

Conversion options

  • Bitrate from 96 to 320 kbps
  • Sample rate: 22.05, 44.1 or 48 kHz
  • Mono, stereo or 3D spatial audio
  • Playback speed (0.5× to 2×)

Frequently asked questions

Is it safe to convert MKV to AAC here?

Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.

Is there a file size limit?

There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.

Can I convert several MKV files at once?

Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.

Related conversions

Convert MKV to other formats

Convert other formats to AAC

See every MKV converter and AAC converter, or browse the full converter directory.