Check your audio’s loudness and peaks, or follow live input. Free, no sign-up, and processed on your device.
Digital input level, not calibrated sound pressure (SPL).
Check a finished mix before release, compare podcast episodes, or monitor a microphone as you work. MyAudioTools measures audio in your browser: no account, no software installation, and no audio upload for analysis.
LUFS describes perceived program loudness, while peak readings show signal headroom. Read them together; a loudness target alone cannot tell you whether your audio will clip.
The gated average across the complete file or captured session. Use this reading to compare finished programs.
Follow loudness over 400 milliseconds and three seconds. The history chart helps reveal changes that one average can hide.
A measure of loudness variation, in LU. Use it as context for dynamics, not as a score where higher or lower is always better.
Sample peak finds the highest digital sample; 4× oversampled true peak estimates peaks between samples. Check dBTP before delivery.
Choose File for a finished recording, or Live Input for sound arriving at an input. Neither mode changes your audio.
In File, drop a recording or browse your device; analysis starts automatically. In Live Input, select a source and press Start. Permission is requested only when capture begins.
Compare Integrated LUFS and True Peak first, then inspect the loudness history. Live mode also offers a dBFS view, pause and resume, Fit All and timeline zoom.
Select a reference target or enter your own. Download the CSV report to keep the readings. Stop live measurement before exporting a complete session; earlier exports are partial snapshots.
Measure the complete exported master, not just its loudest chorus. Compare alternate mixes with the same settings and recheck the final encoded file.
Compare whole episodes or voice-over deliveries for consistent loudness. Check the short-term curve for sudden changes between speakers, music and speech.
Check a soundtrack before handing off an edit. Supported MP4 and WebM files can be decoded for their audio; codec and browser support may vary.
Monitor a microphone or audio interface, then retain a measurement report. Use broadcast presets for comparison, and follow the receiver’s full specification for delivery.
Example: a recording at -18 LUFS is 4 LU below a -14 LUFS reference. That is a measured difference, not an instruction to raise the gain blindly.
If that recording peaks at -2 dBTP, adding 4 dB of gain would push its estimated true peak to +2 dBTP. Adjust dynamics or choose a different level before exporting, then measure again.
A program can meet an integrated target but still jump in loudness between sections. Use momentary and short-term history to identify changes, then listen to those passages in your editor.
This tool does not normalize, limit or master audio. It exports measurement data, not an altered recording. Make changes in an audio-processing tool and return here to check the new file.
These are the presets available in this meter. Playback normalization, mastering advice and broadcaster delivery requirements are different things.
| Reference preset | Integrated target | Peak comparison | How to use it |
|---|---|---|---|
| Streaming music | -14 LUFS | -1 dBTP | A starting comparison for music. Spotify’s Normal setting uses -14 LUFS; playback settings and devices can differ. |
| Stereo podcast | -16 LUFS | -1 dBTP | Compare an episode with Apple Podcasts’ recommendation of about -16 LKFS (±1 dB). |
| EBU R128 | -23 LUFS | -1 dBTP | A broadcast reference. Follow the destination’s required tolerances and program-specific rules. |
| ATSC A/85 | -24 LUFS | -2 dBTP | A broadcast comparison, not a check of dialog metadata or every delivery requirement. |
| Custom | -36 to -5 LUFS | -1 dBTP | Enter a loudness reference. The custom preset’s peak comparison remains fixed at -1 dBTP. |
A preset is not a certification of compliance or an exact streaming-playback prediction. Spotify recommends additional headroom below -2 dBTP for masters louder than -14 LUFS. Check the official guidance linked below.
Analyze one mono or stereo file at a time. MP3, WAV, FLAC, M4A, AAC, OGG, Opus, AIFF, WebM and other listed formats are accepted. Decoding depends on the codec; long or compressed files can use substantially more memory than their file size.
Files selected from your device are decoded and measured locally. Live audio is analyzed without saving a recording. Loading the page and its processing code still uses the network; cloud-file imports use the provider you choose.
Microphone access needs permission. Shared audio needs a supported screen-sharing flow with audio enabled; not every browser, operating system or mobile device offers it. Live sessions stop automatically after one hour.
Microphone gain, device processing and routing affect live readings. Use a file for a repeatable master check. This page does not measure calibrated room-noise levels or certify hearing safety.
File analysis, live metering, history charts and CSV downloads are free. You do not need an account or email address. Select a local file to analyze without signing in to any service.
No. The -14 LUFS preset is a reference, not a universal creative rule or an automatic rejection threshold. Choose a level that works for the music and destination, preserve suitable peak headroom, and listen as well as measuring.
LUFS is a frequency-weighted loudness measurement. dBFS expresses signal level relative to digital full scale; RMS summarizes signal energy. A peak reading and a loudness reading answer different questions, so there is no single conversion that applies to every recording.
The meter needs enough audio: momentary loudness needs 400 ms, short-term needs three seconds, and this interface waits at least four seconds before showing LRA. Silence or audio below the loudness gate may have no finite integrated reading. Short clips also provide limited context for loudness range.
Compare the same complete file, channel layout and measurement type. Decoding, resampling, gating, analysis boundaries and true-peak estimation can cause differences. A live microphone recording of speakers is not equivalent to analyzing the original file.
The measurement engine is bravoh-loudness, which implements ITU-R BS.1770-4 / EBU R128 loudness analysis and 4× oversampled true-peak estimation. File and live modes use the same engine. This is a browser analysis tool, not an independently certified broadcast compliance service.
Only audio supplied by the selected input or a supported browser sharing session. Choose Browser tab / shared audio and enable audio sharing when available. The page cannot silently capture every application, and mobile support varies.
You can download a CSV containing loudness readings, the reference target and measurement history. A live report is marked partial until you stop the session. The meter does not export normalized audio; use a processing tool to change the file.
Consult the source guidance for your destination. Presets here are comparison aids; the meter does not reproduce every platform’s playback processing.