Convert any video file to FLAC format online for free. Fast, secure, and easy-to-use video to FLAC converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Drag and drop your MP4 file, or click to browse for it.
Choose FLAC as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
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Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
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How the two formats differ on the things that change your result.
| Specification | MP4 (source) | FLAC (result) |
|---|---|---|
| Container | MPEG-4 Part 14 | FLAC |
| Developed by | MPEG | Xiph.Org Foundation |
| Introduced | 2003 | 2001 |
| Audio codecs | AAC, MP3, ALAC | FLAC |
| Compression | Depends on codec | Lossless (compressed) |
| Approx. file size | 38–150 MB per minute | 5–7 MB per minute |
| Metadata / tags | Container tags | Vorbis comments |
| Licensing | Patent-licensed | Royalty-free |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs | Native: Web browsers, Windows, macOS, iOS, Android · Needs a player: Smart TVs |
| Best for | web delivery, social media uploads, sharing with anyone | long-term archiving, audiophile listening, CD ripping |
This extracts the audio and discards the video entirely. The soundtrack inside a MP4 file is typically AAC, and it is re-encoded to FLAC on the way out.
Expect a much smaller file. Video accounts for most of the bytes, so about 94 MB per minute becomes roughly 6 MB per minute of FLAC.
Choosing lossless FLAC means nothing further is lost, though it cannot exceed the AAC track stored in the source video.
Subtitles do not survive audio extraction, since an audio container has nowhere to store them.
When a video holds several audio tracks, the main one is extracted; alternate language tracks are not merged into the result.
Extracting FLAC audio from a MP4 video pulls the soundtrack out of the MPEG-4 Part 14 container and writes it as a standalone FLAC file. The video stream, which holds most of the data, is discarded.
Developed by MPEG in 2003, MP4 carries H.264, H.265, or AV1 video and AAC, MP3, or ALAC audio. That combination sets the upper bound on what any conversion can preserve.
FLAC was introduced by Xiph.Org Foundation in 2001. It holds losslessly compressed audio (FLAC) and plays natively on web browsers, Windows, macOS, iOS, and Android.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
Quick access to the most commonly used file conversions
And many more format conversions supported