Free LUFS & True Peak Meter

Ensure your original tracks meet the mastering loudness standards for Spotify, YouTube, and Apple Music.

Online Audio Loudness Analyzer

Accurately measure the perceived loudness and digital peaks of your audio files directly in your browser to achieve professional mastering results.

What are LUFS and True Peak?

Our free online LUFS meter is a crucial utility for modern audio mastering. LUFS (Loudness Units relative to Full Scale) is the industry standard metric that calculates how loud a piece of audio sounds to the human ear. True Peak, on the other hand, measures the absolute maximum limit of the digital signal to prevent distortion and clipping. By analyzing your track locally in the browser, this tool ensures your original recordings and royalty-free music remain 100% private.

How to measure your audio?

Simply upload your uncompressed WAV or MP3 file into the analyzer. The tool will scan the entire waveform to calculate the Integrated LUFS (the overall average loudness of the whole track), the Short-Term LUFS (dynamic loudness over 3-second intervals), and the True Peak. The results are displayed instantly on the dashboard.

Who uses this tool?

This browser-based loudness meter is heavily used by mastering engineers, independent musicians, and podcast editors. It is essential for checking your final mix against streaming platform standards (usually -14 LUFS and -1 dB True Peak) so that your audio is never penalized, distorted, or quieted down by Spotify or YouTube normalization algorithms.

How to Use the Loudness Meter in 3 Steps

Step 1

Upload Audio

Select your original mix or podcast file from your device. Supported formats include WAV, MP3, and FLAC.

Step 2

Analyze Loudness

Wait a few seconds while the tool securely scans the entire waveform to calculate the exact LUFS and Peak data.

Step 3

Review Targets

Check if your track meets the -14 LUFS and -1 dBTP standard. Adjust your mix accordingly if it fails.

Select Audio File to Analyze

Supported formats: WAV, MP3, M4A, OGG, FLAC, AAC

Choose File

Recommendation: Use headphones and make sure your device is not on Silent/Mute mode.

Time: 00:00 / 00:00

Pro Tip: Need to cut out unwanted parts of your track?

Open Audio Trimmer

Integrated LUFS

Perceived Average Loudness

Maximum Peak

Highest Audio Level

Need to adjust these levels?

If your audio is clipping (Peak above 0 dB) or too quiet for YouTube/Spotify standards, you can easily fix it! Use our Sound Optimizer to apply a Compressor and adjust the Gain to hit the perfect -14 LUFS target.

Open Sound Optimizer

Pro Tip: Need your file in .MP3 format? Use our fast converter.

WAV to MP3 Converter

Frequently Asked Questions

Is the LUFS Meter really free?

Yes. This online audio loudness analyzer is completely free, requires no signup, and has no daily limits. You can measure as many original mixes as you need.

Are my audio files safe and private?

Absolutely. The loudness analysis is performed locally within your web browser's memory. Your private audio files and original recordings are never uploaded to our servers.

What is LUFS?

LUFS stands for Loudness Units relative to Full Scale. It is the modern industry standard for measuring perceived audio loudness. Unlike basic peak meters, LUFS measures how loud a track actually sounds to the human ear over time.

What is True Peak?

True Peak measures the absolute highest level of the audio signal, predicting the inter-sample peaks that occur when digital audio is converted to an analog signal. Keeping True Peak below -1 dBTP ensures your audio will not clip or distort on streaming platforms.

What is the standard target for streaming?

Most major streaming platforms (like Spotify, YouTube, and Apple Music) normalize audio to roughly -14 LUFS Integrated, with a maximum True Peak of -1 dBTP. Mastering your audio to these targets ensures it won't be heavily compressed or turned down by the platforms.

Do I need to install any software or plugins?

No. This tool works entirely online directly within your web browser, removing the need to install or download heavy digital audio workstations (DAWs) or expensive metering VST plugins.