Readability Check
Clean
Paste English text and get its reading level free in your browser: Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau and ARI, an estimated CEFR level and every word coloured A1 to C2. Then rewrite it to A2, B1, B2, C1 or a school grade with every fact kept, re-scored and diffed. Word levels from the CEFR-J Wordlist (Tono, TUFS) and the Octanove C1/C2 profile (CC BY-SA 4.0). No API key needed: pay per run with credits.
PricingUsage-based + 10% creator margin
Billed model rate$2.20 in / $13.20 out per 1M tokens
Creator margin+10%
Effective rate$2.40 in / $14.40 out per 1M tokens
Security scanClean — skill and frontend scanned
Model
gpt-terra Created2026-10-31
Updated2026-11-02
Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.