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Normalize loudness to a LUFS target

TutuAudio measures loudness to ITU-R BS.1770 and brings one or several files to -14 LUFS (music streaming), -16 LUFS (podcasts) or -23 LUFS (broadcast) in one click, showing true peak and loudness range. It runs in your browser with no upload; free, no sign-up, no limits. It adjusts overall loudness and does not flatten the dynamics of speech.

Record

MP3, WAV, M4A, AAC, FLAC, OGG, WebM and the audio in MP4 videos

Everything runs in your browser — the file never leaves this device

Drop in a few files, pick a target loudness, and they all come out equally loud.

How it works

  1. 1

    Drag one or more audio files onto the page or click "Choose file"

  2. 2

    Pick a target of -14, -16 or -23 LUFS and check the measured loudness and true peak

  3. 3

    Download the normalized MP3 or WAV files

FAQ

Should I pick -14, -16 or -23 LUFS?
Use -14 for music platforms like Spotify or YouTube, -16 for podcasts, and -23 for TV and broadcast. If unsure, -16 is a safe choice for spoken content.
Is my audio uploaded?
No. Measuring and adjusting loudness both happen in your browser; the file never leaves your device.
Will it clip after making it louder?
No. The gain is capped by the peak ceiling, so it stops slightly short of the target rather than clip, and the true peak reading lets you check. Very peaky audio may land a little below the target.
Is it free? Do I need an account?
Free, no account, no usage limits, and no watermark on the export.
Will it flatten the ups and downs of my voice?
No. It raises or lowers the whole file, so the natural dynamics inside a sentence stay the same. To even out a voice that jumps between loud and quiet, use a compressor.

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Similar tools

Not here? For text-to-speech and AI voices use TutuSound; to edit video or pull audio from video use TutuCut. All audio tools