Check the LUFS & true peak
of any track.

See how loud it is and what Spotify, Apple Music and YouTube would do to it — free, and your audio never leaves your device.

Drop a track to measure its loudness

WAV, MP3, M4A, FLAC or OGG · or

Free · No account · Measured in your browser, never uploaded

A free LUFS and true peak meter

LUFS measures how loud a track is the way people hear it, and true peak tells you how close it comes to clipping once it is converted to MP3 or AAC. Drop in a file and this meter shows both, plus loudness range, and how far each streaming service would turn the track up or down. It runs on your device, so your unreleased music is never uploaded.

How to check the LUFS of a track

  • Drop in your track — a WAV export gives the most exact numbers.
  • Read the two headline numbers — integrated LUFS and true peak.
  • Compare with a platform — see the change it would apply and listen at that level.

What LUFS should I master to?

For most streaming releases, an integrated loudness around −14 LUFS with a true peak at or below −1 dBTP is a safe place to land. Platforms that normalise turn louder tracks down, so pushing past the target mostly costs dynamics. Broadcast uses different targets, such as −23 LUFS for EBU R128.

How this meter measures

It follows ITU-R BS.1770 with K-weighting, 400 ms blocks, and the standard absolute (−70 LUFS) and relative (−10 LU) gates. Loudness range follows EBU Tech 3342, and true peak uses oversampling as BS.1770 describes. Mono files read one channel unless you choose dual mono, and files above six channels are not supported.

LUFS meter — FAQ

How do I measure the LUFS of a song?

Drop a WAV, MP3, M4A, FLAC or OGG into the meter above. It shows the integrated loudness in LUFS, the true peak in dBTP and the loudness range.

What is a good LUFS level for streaming?

Spotify normalises to about −14 LUFS and Apple Music to about −16 LUFS. A master near −14 LUFS with a true peak at or below −1 dBTP is a common safe target.

What is true peak (dBTP)?

True peak estimates the highest level after the signal is reconstructed to analogue, which can be higher than any sample. Staying under −1 dBTP leaves room for lossy conversion.

Is my audio uploaded?

No. The file is read and measured in your browser. Nothing is sent to a server.

Why does my number differ from another meter?

Small differences come from lossy files decoded at different sample rates, different gating, or mono handling. This meter follows ITU-R BS.1770 and shows what it did.

Which platform targets are official?

Each row is labelled. Official means the platform or standards body publishes the figure; community-measured means independent testing, which platforms can change without notice.

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