Napster Loudness Checker
Check how Napster will normalize your master at its -14 LUFS reference, with a −1 dBTP peak guideline.
Napster applies loudness normalization around -14 LUFS. As with every normalizing service, mastering hotter only sacrifices dynamics; aim near the reference with clean −1 dBTP peaks for the most faithful playback.
🔒 Everything runs in your browser via the Web Audio API — your audio is never uploaded.
Check how Napster will normalize your master at its -14 LUFS reference, with a −1 dBTP peak guideline.
About Napster Loudness Checker
Check how Napster will normalize your master at its -14 LUFS reference, with a −1 dBTP peak guideline. Napster applies loudness normalization around -14 LUFS. As with every normalizing service, mastering hotter only sacrifices dynamics; aim near the reference with clean −1 dBTP peaks for the most faithful playback.
How to use Napster Loudness Checker
- 1Drag a file onto Napster Loudness Checker, 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 Napster Loudness Checker?
- ✓Analyses your file entirely in your browser — it is never uploaded, so even confidential masters stay private.
- ✓Built on a published reference: AES TD1008 (streaming loudness practice).
- ✓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 Napster Loudness Checker do?+
Check how Napster will normalize your master at its -14 LUFS reference, with a −1 dBTP peak guideline. Napster applies loudness normalization around -14 LUFS.
Is my file uploaded to a server?+
No. Napster Loudness Checker 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 Napster Loudness Checker based on?+
It follows AES TD1008 (streaming loudness practice). Always confirm against the current official document, as specifications and rates can change.
Is Napster Loudness Checker 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.
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