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Audio Loudness Meter

Run a local BS.1770-style gated loudness preflight with visible gate evidence.

Local execution receiptinput path disclosedTool content stays out of MonoTools URLs and API requests.
Working input
Browser memory
Cross-tool handoff
Session only · 10 min
URL payload
Never
Export
Explicit action

Verify it: open DevTools Network, clear the log, use the tool, then inspect fetch/XHR requests. Page assets and optional aggregate analytics may use the network; tool input is not included.

Full privacy model
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How to use

  1. 01Choose a local audio file.
  2. 02Review integrated and momentary loudness, LRA, RMS, sample peak and gate counts.
  3. 03Download the evidence report and keep the stated true-peak boundary in mind.
02

FAQ

Is this EBU R128 certified?
No. It implements the core BS.1770 K-weighted gated calculation in browser PCM, but it is not calibrated hardware and reports sample peak rather than oversampled true peak.
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