Loudness

Audio Normalizer (LUFS)

Use the audio normalizer to measure LUFS and true peak, then normalize loudness to −16, −18 or −23 LUFS. Process and export WAV locally for free.

Loudness normalizerOn-device

Choose or drop an audio fileMP3, WAV, M4A, OGG, Opus, FLAC, WebM or AAC · up to 50 MB and 5 minutes · mono or stereo

Target loudnessTrue-peak ceiling

Uses FFmpeg's two-pass loudnorm: the file is measured, the measured values are applied, and the result is measured again. Values shown are measurements of the files, not targets.

Result

No result yet

Measure the file, then normalize it to create a new WAV.

Decoding and loudness run in the built-in FFmpeg engine; pause analysis runs in a background worker. The original file is never changed.

Good to know

Memory limitsUp to 5 minutes, 50 MB and two channels per file, because the whole recording is decoded into browser memory (about 115 MB for 5 minutes of stereo).

Which target?−16 LUFS suits podcasts and streaming, −18 LUFS spoken word, −23 LUFS broadcast. Very short or very quiet files can land a little off target.

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Your files stay with you

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