14 days free · then €39 once · macOS 13+, Apple Silicon
About this tool
Free Online LUFS Normalizer
Normalise your audio files to any LUFS target directly in your browser. Use platform presets for Spotify, Apple Music, YouTube and podcasts, or set a custom target. Batch process multiple files with consistent loudness output.
Platform presets
- Spotify — -14 LUFS integrated
- Apple Music — -16 LUFS integrated
- YouTube — -14 LUFS integrated
- Podcast — -16 to -19 LUFS integrated
- Custom — set any LUFS target
How it works
Drop your audio files, select a target loudness (or choose a platform preset), then normalise. The tool measures the integrated LUFS of each file and applies the correct gain adjustment to hit your target. All processing runs locally in your browser.
Frequently asked questions
What LUFS should I use for Spotify?
Spotify normalises to -14 LUFS integrated. Use the Spotify preset to match this target automatically.
Will normalising clip my audio?
No. The tool applies one constant gain and measures the true peak of the file it writes. If reaching your target would push the true peak over the ceiling, the gain is lowered instead: within 0.5 LU of the target the file is written and the level it reached is shown; further off, the file is flagged and not written. Silent or very short files are skipped.
Can I normalise multiple files to the same target?
Yes. Drop all your files and they will all be normalised to the same LUFS target. This is useful for preparing albums, playlists or delivery batches.
Are my files uploaded anywhere?
No. All processing runs in your browser using the Web Audio API. No files leave your machine.