Convert mp4 to flac
Converted on your device. Files never leave this tab. Output tops out around 2 GB.
Nothing is uploaded
The converter runs inside this page. Cut your network after it loads and it still works.
No account, no daily limit
No sign-up, no daily limit, no watermark, no queue behind other people's files. Batch as many MP4 files as you like.
Real FLAC output
Encoded by ffmpeg, the same library the command-line tools use — not a renamed extension.
About MP4
MPEG-4 Part 14
An ISO container standard (ISO/IEC 14496-14) based on Apple's QuickTime format. It usually holds H.264 or H.265 video with AAC audio. Use it when a video has to play on any phone, browser, TV or editing app.
About FLAC
Free Lossless Audio Codec
A lossless codec from Xiph.Org, first released in 2001, that typically shrinks CD audio to 50 to 70 percent of its WAV size and decodes to identical samples. Use it to archive music and CD rips without losing any quality.