How to convert MP4 to FLAC
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert MP4 to FLAC
NexMedia converts MP4 to FLAC on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About MP4
MP4 (MPEG-4 Part 14) is a container format standardised by ISO. It usually holds H.264 or H.265 video with AAC audio, and it can also carry subtitles and chapter markers.
It is the most widely supported video format: phones, browsers, smart TVs and video sites all play it.
The video inside an MP4 is almost always compressed with a lossy codec, so every re-encode loses a little quality.
Convert MP4 to FLAC online free, no account required — FLAC is a lossless compressed audio format.
Change MP4 to FLAC without losing quality — convert MP4 to FLAC free in your browser.
Why is my MP4 file so large? MP4 video is already compressed with H.264 or H.265, so a lower bitrate or resolution shrinks the file at the cost of some quality.
About FLAC
FLAC (Free Lossless Audio Codec) compresses audio without losing anything: the files are typically half to two thirds the size of WAV and decode back to the exact original samples.
Music archives, CD rips and high-resolution downloads.
FLAC files are several times larger than MP3, and some older players and car stereos do not play them.
Why convert CDs to FLAC instead of MP3? The copy is bit-for-bit identical to the original, so the archive never loses quality however often it is converted later.
What changes when you convert MP4 to FLAC
- The soundtrack of the MP4 is re-encoded as FLAC at the default settings, so it is close to the original but not bit-identical.
- Only the sound is kept: the FLAC file contains the audio track of your MP4, and the picture is dropped.
Settings you can change
Before you convert MP4 to FLAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted FLAC file is kept for 2 hours, then deleted.
MP4 to FLAC: questions and answers
Does converting MP4 to FLAC reduce quality?
The soundtrack of the MP4 is re-encoded as FLAC at the default settings, so it is close to the original but not bit-identical.
What is the difference between MP4 and FLAC?
MP4 is a widely supported video container, usually holding H.264 video and AAC audio. FLAC is a lossless compressed audio format.
Can I change the settings when converting MP4 to FLAC?
Before you convert MP4 to FLAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert MP4 to FLAC?
No. You can convert MP4 to FLAC without an account; signing in raises the file-size and daily limits.
How long is my converted FLAC file kept?
The FLAC file you convert from MP4 is kept for 2 hours, then deleted automatically.
When I convert MP4 to FLAC, can I keep just the sound?
Only the sound is kept: the FLAC file contains the audio track of your MP4, and the picture is dropped.
Will converting MP4 to FLAC change my original file?
No. The conversion reads your MP4 and writes a new FLAC file, leaving your original MP4 file untouched.