Free tool
LUFS Checker
Measure your track's integrated LUFS and true peak and see exactly how it stacks up against Spotify, Apple Music, YouTube and club targets — all on your device, nothing is uploaded.
How to check your track's loudness
- Drop your track (or click to browse) — it's decoded and measured in your browser.
- Read the two headline numbers: integrated LUFS (perceived loudness) and true peak in dBTP.
- Scan the platform table: it shows how far you are from each target and whether your peaks are safe.
- Too quiet or too hot? Run it through the AI mastering tool at −14 (streaming) or −9 (club) LUFS.
Frequently asked questions
Is my audio uploaded anywhere?
No — the file is decoded and measured entirely in your browser using the Web Audio API. Nothing is sent to a server.
What LUFS should my track be for Spotify?
Spotify normalises to about −14 LUFS integrated (YouTube and TIDAL are similar, Apple Music around −16). Louder masters simply get turned down, so aim for a master that still sounds great at −14 rather than chasing maximum loudness.
What is true peak and why does it matter?
True peak estimates the real analog peak between digital samples. If it exceeds about −1 dBTP, lossy encoding (the MP3/AAC streaming platforms use) can clip and distort your track even though the digital samples never hit 0.
My track measured quiet — is that bad?
Not necessarily. A mix with healthy headroom (−18 LUFS or quieter) is the ideal input for mastering. If it's a finished master, though, being far below −14 LUFS means it will sound noticeably quieter next to commercial releases.