Loudness Meter
Measure LUFS and true peak, then normalise to a target.
Know How Loud Your Track Really Is
Streaming services do not play everything at the level it was mastered: they measure loudness in LUFS and turn loud tracks down to a target, usually −14 LUFS. Open a master, a podcast episode or a voice-over here to see its integrated loudness, true peak, loudness range and maximum short-term loudness, and a table showing exactly how much each platform would turn it down or leave it quieter.
The measurement follows ITU-R BS.1770-4 and EBU R128 — the same K-weighting filters, 400 ms gating and 4× oversampled true peak as professional meters. If the file misses its target, normalise it: choose a target and a true-peak ceiling, and a look-ahead limiter catches any peaks the gain would push over.
Key features
- Integrated loudness with absolute and relative gating, per BS.1770-4.
- True peak in dBTP from 4× oversampling, not just the sample peak.
- Loudness range (LRA) and maximum short-term loudness.
- Platform table for Spotify, YouTube, Apple Music, Amazon and broadcast.
- Normalise with a limiter to −14, −16, −19, −23 or −24 LUFS at your chosen ceiling.
This tool does its work inside your browser using native Web APIs. The files and text you give it are processed on your device and are not uploaded to our servers.
How to use: Loudness Meter
- Open the file
Drop a finished mix, episode or voice-over onto the box. - Read the meters
Check integrated LUFS, true peak and loudness range, and the platform table. - Pick a target
Choose the loudness your platform expects and a true-peak ceiling (−1 dBTP is safe). - Normalise and save
Press Normalise, listen, then download the WAV.
Technical specifications
| Processing location | Entirely in your browser — no server round trip |
|---|---|
| Data uploaded | None. Files and text never leave your device |
| Price | Free — no account, no trial, no usage cap |
| Category | Audio |
| Works offline | Yes, once the page has loaded |
| Browser support | Chrome 90+, Edge 90+, Firefox 90+, Safari 15+ |
| Interface languages | English, 中文, हिन्दी, Español, العربية |
Frequently asked questions
What loudness should I aim for?
For music on streaming services, around −14 LUFS with peaks at −1 dBTP. Podcasts usually sit at −16 LUFS (stereo) or −19 (mono), and European broadcast at −23.
Why does it matter if my song is louder than −14?
Spotify and YouTube turn it down to −14 anyway, so the extra loudness is lost — but the dynamics you squashed to get it are not coming back.
What is true peak?
The highest level of the reconstructed analogue waveform, which can exceed the highest sample. Lossy encoding can turn those inter-sample peaks into distortion, which is why −1 dBTP is recommended.
Does normalising change the sound?
Plain gain does not. If the target needs more level than the peaks allow, the limiter gently reduces the loudest moments; untick “Limit peaks” to stop at the ceiling instead.
Is the file uploaded for analysis?
No. The meters run in your browser on the decoded samples.