How accurate is this LUFS analyzer?

This tool uses a BS.1770-style K-weighted and gated loudness workflow at 48 kHz. For most production use cases, readings track closely with dedicated loudness meters.

What loudness targets should I use for streaming?

A common target is around -14 LUFS integrated with true peak kept below -1 dBTP, but exact targets vary by platform and delivery spec.

Which audio files can I analyze?

Most modern browsers can decode WAV, MP3, AIFF, AAC, M4A, and sometimes FLAC. If your browser cannot decode a file type, convert to WAV first.

Free LUFS Analyzer Online (Accurate Integrated Loudness Meter)

Loudness Unit EBU R128 · ITU-R BS.1770

Standby

01 — Signal Intake

Drop audio file

WAV, AIFF, MP3, M4A, AAC or FLAC. Nothing is uploaded — analysis runs on your machine.

Select File

Source—

Duration—

Sample Rate—

Channels—

02 — Integrated Program LoudnessI

— LUFS

Awaiting signal

Integrated —

Range LRA —

True Peak —

03 — Meter BankLUFS / dBTP

—

Momentary
max

—

Short-term
max

—

Integrated

—

True peak
dBTP

04 — Loudness over time

Short-term Momentary Integrated Target −14

Momentary Max—

Short-Term Max—

Loudness Range—

True Peak—

Sample Peak—

Peak / Loudness—

Integrated—

Analysis Rate—

K-weighted, gated per ITU-R BS.1770 (400 ms / 100 ms hop). True peak estimated with 4× oversampling. Browser decoding may vary slightly from dedicated meters.

Features

Integrated LUFS — BS.1770-style gated loudness estimate for mix and master checks.
Momentary + Short-Term — Fast read on dynamic peaks and section-level loudness.
Loudness Range (LRA) — Useful dynamic range indicator for production decisions.
True Peak + Sample Peak — Catch inter-sample risk before export.
Private Browser Workflow — Analysis runs locally in your browser session.

Frequently Asked Questions

How close is this to dedicated loudness plugins?

This analyzer follows a BS.1770-style K-weighting and gating workflow and is highly practical for preflight loudness checks. Dedicated mastering meters may still differ slightly because of channel mapping and true-peak interpolation methods.

Can I analyze stems and full mixes?

Yes. Drop any supported audio file to analyze speech, music, stems, demos, or full masters.

What LUFS target should I aim for?

Targets vary by platform and distribution spec. A common streaming reference is around -14 LUFS integrated, while some broadcast deliverables require stricter standards.