Free Online LUFS Meter
Check your audio loudness instantly. Compliant with EBU R 128 and ITU-R BS.1770-4 standards. Optimize your tracks for Spotify, Apple Music, YouTube, and more.
Loudness Analyzer
EBU R 128 / ITU-R BS.1770-4
Drop your master track here
Supported: MPEG, MP3, WAV, X-WAV, AAC, M4A, MP4, OGG, FLAC, WEBM
Why Check Your LUFS?
Streaming Compliance
Ensure your track isn't penalized (turned down) by Spotify (-14 LUFS) or Apple Music (-16 LUFS).
Dynamic Consistency
Check LRA (Loudness Range) to balance dynamics vs. loudness wars competitiveness.
Professional Mastering
Use the same metrics as professional mastering engineers (Integrated, Short-term, Momentary).
Loudness Targets for Streaming Services
Standard target. Tracks louder than this are turned down.
Focuses more on dynamics. Sound Check default.
Reference level for music videos.
Competitive loudness for DJ sets and physical media.
Frequently Asked Questions
What is LUFS?
LUFS stands for Loudness Units relative to Full Scale. It's the standard way to measure audio loudness that matches how the human ear perceives volume, unlike simple peak metering.
What is the difference between Integrated, Short-term, and Momentary?
Integrated: Average loudness of the entire track (used for compliance).
Short-term: Loudness over a 3-second window.
Momentary: Instant loudness over 400ms.
Does this tool work offline?
Yes! The processing happens entirely in your browser using Web Audio API. Your files are never uploaded to a server.
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