Tools for audiobook narrators
Pass QA the first time.
Free tools for the technical side of an audiobook submission. Drop in your files and see where they stand against what ACX and Spotify for Authors publish, chapter by chapter. Everything runs in your browser: no sign-up, nothing uploaded, nothing stored.
ACX audiobook checker
- Audiobooks
Drop a whole book: RMS, peak, noise floor and room tone for every file against ACX’s requirements (or Spotify for Authors’), with the fix for each. Nothing uploaded.
Open →AudioMono compatibility checker
- YouTube
- Shorts
- Reels
- TikTok
- Podcasts
- Audiobooks
Fold a stereo mix to mono and see what it loses, second by second: phase correlation, the worst sections, and dual-mono, one-sided or inverted channels, with the fix.
Open →AudioRoom tone & noise floor meter
- Podcasts
- Audiobooks
Your recording’s noise floor in dB RMS and LUFS, every pause with its level, dead air where an edit went silent, and the level of any stretch you drag across.
Open →Every platform figure comes from the platform’s own documentation, with the date it was checked. ACX doesn’t publish how it measures, so where a method is needed the tools say whose they use.
Also here: Tools for creators · Broadcast, streaming & post tools.