ACX Audiobook Submission Checker
Run the three ACX technical checks in your browser: RMS between −23 and −18 dB, peaks ≤ −3 dB, and noise floor ≤ −60 dB RMS.
ACX requires every uploaded chapter to measure: RMS −23 to −18 dB, peaks ≤ −3 dB, noise floor ≤ −60 dB RMS. Check a chapter file before you submit.
🔒 Your audio is analysed entirely in your browser. Note: ACX also has non-measured requirements (opening/closing credits, room tone head/tail, 192 kbps CBR MP3 at upload) this tool can't check.
Run the three ACX technical checks in your browser: RMS between −23 and −18 dB, peaks ≤ −3 dB, and noise floor ≤ −60 dB RMS.
About ACX Audiobook Submission Checker
Run the three ACX technical checks in your browser: RMS between −23 and −18 dB, peaks ≤ −3 dB, and noise floor ≤ −60 dB RMS. Run the three ACX technical checks in your browser: RMS between −23 and −18 dB, peaks ≤ −3 dB, and noise floor ≤ −60 dB RMS.
How to use ACX Audiobook Submission Checker
- 1Drag a file onto ACX Audiobook Submission 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 ACX Audiobook Submission Checker?
- ✓Analyses your file entirely in your browser — it is never uploaded, so even confidential masters stay private.
- ✓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 ACX Audiobook Submission Checker do?+
Run the three ACX technical checks in your browser: RMS between −23 and −18 dB, peaks ≤ −3 dB, and noise floor ≤ −60 dB RMS. Run the three ACX technical checks in your browser: RMS between −23 and −18 dB, peaks ≤ −3 dB, and noise floor ≤ −60 dB RMS.
Is my file uploaded to a server?+
No. ACX Audiobook Submission 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.
Is ACX Audiobook Submission 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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