Online LUFS Meter (BS.1770-4)
Free LUFS meter in your browser: integrated, short-term max, momentary max, LRA, true peak and sample peak — no upload, no install.
This is the full EBU-Mode measurement set: gated integrated loudness (400 ms blocks, −70 LUFS absolute and −10 LU relative gates), 3 s short-term, 400 ms momentary, EBU Tech 3342 loudness range and 4× oversampled true peak.
🔒 Everything runs in your browser via the Web Audio API — your audio is never uploaded.
Free LUFS meter in your browser: integrated, short-term max, momentary max, LRA, true peak and sample peak — no upload, no install.
About Online LUFS Meter (BS.1770-4)
Free LUFS meter in your browser: integrated, short-term max, momentary max, LRA, true peak and sample peak — no upload, no install. This is the full EBU-Mode measurement set: gated integrated loudness (400 ms blocks, −70 LUFS absolute and −10 LU relative gates), 3 s short-term, 400 ms momentary, EBU Tech 3342 loudness range and 4× oversampled true peak.
How to use Online LUFS Meter (BS.1770-4)
- 1Drag a file onto Online LUFS Meter (BS.1770-4), or click to choose one — it is analysed locally and never uploaded.
- 2Wait a moment while the tool processes the file entirely in your browser.
- 3Read the result, metrics and pass/fail verdict.
- 4Copy or export the report for your delivery, QC log or records.
Why use Online LUFS Meter (BS.1770-4)?
- ✓Analyses your file entirely in your browser — it is never uploaded, so even confidential masters stay private.
- ✓Built on a published reference: ITU-R BS.1770-4.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Online LUFS Meter (BS.1770-4) do?+
Free LUFS meter in your browser: integrated, short-term max, momentary max, LRA, true peak and sample peak — no upload, no install. This is the full EBU-Mode measurement set: gated integrated loudness (400 ms blocks, −70 LUFS absolute and −10 LU relative gates), 3 s short-term, 400 ms momentary, EBU Tech 3342 loudness range and 4× oversampled true peak.
Is my file uploaded to a server?+
No. Online LUFS Meter (BS.1770-4) processes your file entirely in your browser using local JavaScript and the Web platform — your media never leaves your device, so it is safe for unreleased or confidential content.
What standard or source is Online LUFS Meter (BS.1770-4) based on?+
It follows ITU-R BS.1770-4; EBU Tech 3341 (EBU Mode metering) & Tech 3342 (LRA). Always confirm against the current official document, as specifications and rates can change.
Is Online LUFS Meter (BS.1770-4) free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Related Broadcast tools
Shutter Angle Calculator
Convert shutter angle to shutter speed at any frame rate — the 180° rule and its exceptions, for cinema cameras that think in degrees.
● LiveFlicker-Free Shutter Calculator
Check whether your shutter speed will band under 50 Hz or 60 Hz mains lighting, and get the flicker-safe shutter speeds for your region.
● LiveCamera Battery Runtime Calculator
How long will a V-mount or NP-F battery power your rig? Watt-hours ÷ camera draw → runtime, plus how many batteries a shoot day needs.
● Live