Free Online Audio Normalizer
Match loudness to YouTube, podcast or broadcast standards.
Drag & drop your audio file here
or
Max file size: 100 MB · MP3, WAV, FLAC, OGG
Original
beats per minute
musical key
The whole file is gain-adjusted so its integrated loudness lands on this target. -14 LUFS matches YouTube and Spotify; -16 suits podcasts; -23 is the EBU R128 broadcast standard.
Processing…
Result
How it works
The Audio Normalizer matches your file to a loudness standard instead of a peak level. It measures integrated loudness the way the industry does — BS.1770 K-weighted, with 400 ms overlapping blocks and the standard -70 LUFS absolute / -10 LU relative gates — then applies exactly the gain needed to land on your target.
One-click presets cover the targets that matter: -14 LUFS for YouTube and Spotify, -16 LUFS for podcasts, -23 LUFS for EBU R128 broadcast delivery. The result line reports the measured input loudness, the target, and the gain applied, so the whole operation is transparent.
This is a buffer (offline) tool: the whole file is measured and gain-adjusted, then returned as a downloadable file. Everything runs client-side in your browser, so your files never leave your device and nothing is uploaded anywhere.
Frequently asked questions
What is the difference between loudness and peak normalization?
Peak normalization makes the loudest sample hit 0 dBFS, which says nothing about how loud a file sounds — a dynamic classical piece and a squashed pop track can peak identically yet sound wildly different in volume. Loudness normalization measures perceived loudness with the BS.1770 (LUFS) standard — the same method YouTube, Spotify and broadcasters use — and adjusts the gain so the whole file lands on your target. Two files normalized to -14 LUFS sound equally loud.
Which target should I choose?
-14 LUFS for YouTube/Spotify uploads, -16 LUFS for podcasts and voice, -23 LUFS if you are delivering to a broadcaster that follows EBU R128. Matching the platform target avoids a second round of automatic gain changes.
Can normalizing cause clipping?
Yes — if your file is already loud, boosting it to the target can push peaks past 0 dBFS. The tool applies pure gain with no limiter, so check the result: if you hear distortion, pick a lower (more negative) target. Quieter sources are always safe to lift.
Is there a file size limit? Is it private?
Files up to 100MB are supported. Loudness measurement and gain run entirely in your browser - your audio never leaves your device.