Step 1: Supply your MKV files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted FLAC files.
MKV to FLAC Conversion FAQ
How do I extract the audio from a MKV as FLAC?
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Upload the MKV file and the converter demuxes the audio track, then re-encodes it as FLAC. No re-encoding of the video happens — only the audio stream is processed, which keeps it fast even on long videos.
Will the audio quality match the original MKV track?
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Yes — the audio is extracted at the source bitrate where possible. If you pick a higher FLAC bitrate than the source, the file will not improve in quality, just grow in size.
Is the MKV to FLAC conversion reversible?
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You can convert the FLAC back to MKV on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
Will the FLAC be larger than the MKV?
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Yes — lossless containers store every byte. Expect the FLAC to be 3-8x the size of the MKV. The benefit is no further quality loss on editing or re-encoding.
Does converting MKV to FLAC improve the audio quality?
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No, and it is worth being blunt: nothing can. The MKV already discarded detail during its original encode, and wrapping what remains in a lossless FLAC preserves exactly that — no more. The file gets several times larger and sounds identical. It is still the right move before editing, because FLAC will not add a second generation of artefacts when you export. FLAC gives you WAV fidelity at half the size, with proper metadata tags and embedded artwork, which is why it dominates lossless music libraries. MKV has almost no native hardware support — phones, browsers and TVs usually need VLC or a remux before they will play it.
Can I tag the FLAC with artist and album information?
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Yes, and it is a genuine gain over MKV, which has nowhere dependable to store any of it. FLAC carries title, artist, album, year, track number and embedded cover art in the container itself, so a music library files it correctly without a manual pass.
Is there a file-size limit when converting MKV to FLAC?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several MKV files to FLAC at once?
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Yes. Drop or pick multiple MKV files in one upload — the converter processes them in parallel and returns a ZIP of the FLAC results. There is no need to repeat the upload step per file.
What happens to my MKV files after the conversion?
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Uploaded files and FLAC outputs are auto-deleted after a short retention window. We do not inspect, share, or train on user files. Direct download links are time-limited and tied to your session.
What apps can play a FLAC file?
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FLAC plays in most music players, browsers, and media libraries. iTunes / Apple Music, VLC, Foobar2000, and phone media apps handle it natively.
Do I need to install software to convert MKV to FLAC?
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No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert MKV to FLAC?
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No. MKV to FLAC conversion is free and works without an account. Signing in unlocks higher file-size caps, batch history, and API access.
