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Convert MKV to FLAC
iPhones, social networks and some TVs do not accept MKV. FLAC compresses audio to roughly half size without losing any quality.
- Free
- No sign-up
- Batch conversion
Why convert MKV to FLAC?
To convert MKV files to FLAC, drop them on the counter above.
Most files convert in seconds: no queue, no email address, and the FLAC result saves straight to your computer or phone.
How to convert MKV to FLAC
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Add your MKV files
Drag your MKV files onto the counter or pick them with Choose files. You can add several at once.
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Check the settings
The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.
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Conversion starts by itself
Each file is converted to FLAC and its row is stamped CONVERTED.
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Download your FLAC file
Get the file with Download. With several files you can download them all as one ZIP.
MKV vs FLAC
| Property | MKV | FLAC |
|---|---|---|
| Full name | Matroska Video | Free Lossless Audio Codec |
| Type | Video | Audio |
| Compression | Depends on codec | Lossless |
| Created by | Matroska | Xiph.Org Foundation |
| Year | 2002 | 2001 |
| Extensions | .mkv | .flac |
| MIME | video/x-matroska | audio/flac |
About the formats
MKV
Matroska Video
MKV (Matroska) is a flexible video container that can hold several audio tracks, subtitles and chapters in one file. It is common in film collections and OBS recordings.
FLAC
Free Lossless Audio Codec
FLAC is an open format that compresses audio to roughly half size without losing any quality. Music archivists and hi-fi listeners prefer it.
Frequently asked questions
Is converting MKV to FLAC free?
Yes, completely free. No account, no daily limit, no watermark and no queue.
Will the sound quality drop?
FLAC is lossless, so the soundtrack is carried over as it is.
Does it work on a phone?
Yes. It works on iPhone, iPad and Android, with no app to install.
Is there a file size limit?
There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.
Other conversions
| Family | Give | → | Get | What you gain |
|---|---|---|---|---|
| MKV | MP4 | plays everywhere | ||
| MKV | MP3 | sound only, plays on every device | ||
| MKV | MOV | Apple and video editors | ||
| MKV | WEBM | light video for the web | ||
| MKV | AVI | works with old players | ||
| MKV | GIF | silent loop | ||
| MKV | WAV | sound only, lossless, ready to edit | ||
| WAV | FLAC | lossless at half size | ||
| MP3 | FLAC | lossless at half size · MP3 recording | ||
| M4A | FLAC | lossless at half size · iPhone voice memo | ||
| AAC | FLAC | lossless at half size · raw AAC stream | ||
| OGG | FLAC | lossless at half size · Telegram voice message | ||
| OPUS | FLAC | lossless at half size · WhatsApp voice note |