Normalize Audio Loudness
Bring audio to a target loudness like −14 LUFS for streaming or −16 for podcasts
- Files never leave your device
- Runs in your browser
- Free, no sign-up, no watermark
Drop files here, or click to choose
Accepts MP3, WAV, M4A, AAC, OGG, FLAC, WebM, MP4, MOV, MKV · You can also paste with Ctrl+V / ⌘V
How to use Normalize Audio Loudness
Bring audio to a standard loudness in LUFS, measured the way Spotify, YouTube, Apple Music and broadcasters measure it. Choose a target such as −14 LUFS, set a true-peak ceiling, and normalize many files, or the soundtrack of videos, at once.
- 1
Drop audio or video files (MP3, WAV, M4A, FLAC, OGG, MP4, MOV, MKV) on the page.
- 2
Pick a Target loudness preset, or Custom (−40 to −5 LUFS), and set the True-peak ceiling.
- 3
Compare the Before and After figures, and switch Listen to between Original and Normalized while it plays.
- 4
For videos, choose Keep video or Audio only; pick the output format, click Normalize, then Download.
Frequently asked questions
What is the difference between LUFS and peak normalization?
Peak normalization only looks at the loudest sample. LUFS measures perceived loudness over the whole file (ITU-R BS.1770-4 / EBU R128), so files normalized to the same LUFS sound equally loud.
Which target should I use?
−14 LUFS for Spotify, YouTube and TikTok, −16 LUFS for Apple Music and podcasts, −23 LUFS for EBU R128 broadcast, and −24 LUFS for US TV (ATSC A/85).
Why did a file not reach the target?
If reaching it would need more than 6 dB of limiting, the tool stops earlier to avoid squashing the sound, and tells you the level it reached.
What happens to video files?
With Keep video, the picture is copied untouched and only the soundtrack is rewritten. Audio only saves just the normalized sound.
Are my files uploaded?
No. Loudness is measured and adjusted in your browser.