Loudness Analyzer
Professional audio metering powered entirely by your browser — your files never leave your device.Also includes loudness normalization "penalty" for the different major platforms with the dropdown below.
Frequently Asked
How do I use the Loudness Analyzer?
It couldn’t be simpler:
- Drop your file onto the analyzer, or click to browse and select it from your device.
Most common audio formats are supported: WAV, MP3, MP4, M4A, OGG, FLAC, and AAC.
- Wait a moment while the tool processes your file. Analysis time depends on the length of the track — most songs complete in just a few seconds.
- Read your results. Your six loudness statistics appear immediately. Pay particular attention to the Integrated LUFS — that’s the number the streaming platforms will compare against their targets.
- Expand the Streaming Platform panel to see exactly how each major platform will handle your track, and by how much it will be adjusted.
- Export your report using the button at the top right. You’ll get a clean text file with all measurements and platform comparisons — handy for sharing with clients or keeping as a reference alongside your project files.
What is loudness normalization and why does it matter for my music?
When you upload a track to a streaming platform, the platform automatically adjusts its playback volume so that all songs are perceived at roughly the same loudness. This process is called loudness normalization. Each platform has its own target — for example, Spotify and YouTube normalize to around −14 LUFS, while Qobuz targets a quieter −18 LUFS.
If your track is louder than the target, the platform will turn it down. If it’s quieter, most platforms simply leave it as-is rather than boosting it. This means that over-compressing or over-limiting your master to make it “loud” actually works against you — the platform will reduce it anyway, but you’ll have sacrificed dynamic range in the process. Knowing where your track sits relative to each platform’s target lets you make informed mastering decisions and deliver the best possible listening experience.
Read more in this article I wrote: Why Louder Is Not Better?
Is my audio file uploaded anywhere? How is my data handled?
Your audio file never leaves your device.
This tool runs entirely inside your web browser using the Web Audio API — a built-in capability of all modern browsers. When you drop a file onto the analyzer, it is read and processed locally by your own computer’s processor. No data is sent to any server, no file is stored anywhere, and no third party ever has access to your audio. You can even disconnect from the internet before dropping your file and the tool will work perfectly.
This also means the tool is completely free with no account required, no usage limits, and no hidden data collection.
What are LUFS and what do the other stats mean?
LUFS stands for Loudness Units relative to Full Scale — it’s the international standard for measuring perceived loudness in audio. Unlike simple peak levels, LUFS accounts for how the human ear actually experiences volume, making it the go-to metric for broadcast, streaming, and mastering.
- Integrated LUFS is the average loudness of your entire track, measured from start to finish with gating applied to ignore silence. This is the most important number for streaming platforms.
- Max Short-Term LUFS is the loudest 3-second window found anywhere in your track. Useful for identifying the densest, loudest sections.
- Max Momentary LUFS is the loudest 400ms snapshot in the file. It reacts faster than short-term and captures transient intensity.
- Max True Peak measures the actual peak level of the audio signal between digital samples, using oversampling. Expressed in dBTP (decibels True Peak), it’s the most accurate way to detect clipping — especially after encoding.
- Max Peak is the highest individual sample value in the file, expressed in dBFS (decibels relative to Full Scale). 0 dBFS is the absolute digital ceiling.
- Max RMS reflects the loudest average power level found in any short window of the track. It gives a good sense of the energy and density of your mix.
What is EBU R128?
EBU R128 is the European Broadcasting Union’s standard for loudness normalization and maximum permitted true peak level in audio. Published in 2010 and regularly updated since, it defines exactly how loudness should be measured and targets a program loudness of −23 LUFS for broadcast content. It is built on the ITU-R BS.1770 measurement algorithm, which applies a specific frequency weighting (called K-weighting) to reflect how the human ear perceives different frequencies at different volumes. EBU R128 is now the foundation for loudness standards across television, radio, podcasting, and music streaming worldwide. This tool follows its measurement methodology precisely.
We've much more for you to explore:
FEEDBACK, ANSWERS, HELP WITH TROUBLESHOOTING
Available 7/7
You want some feedback on your project, you have some audio related question or even need some help troubleshooting something?
Don’t wait any longer, hit us up!
