First CH Apps / LP Copy Persona Check
Paste the copy from a landing page or service page and pick an industry. An AI role-plays three simulated buyer personas typical of the Japanese market for that industry, and returns estimated scores for clarity, trust and impact on purchase intent, plus a 5-step rating of how formal the tone is. You also get each persona's reaction and drop-in rewrites (in Japanese).
This does not replace user testing with real customers. It is a one-off check to spot where readers may stumble before you publish (no saved personas, history or sharing).
Only the copy you enter and the industry you pick are sent. Our server (Cloudflare Pages Functions) passes them to Cloudflare Workers AI (a language model running on Cloudflare) and returns the result. Cloudflare handles it under its own terms.
Your copy and the result are not stored (not in a database, not in logs). They are gone when the request ends. There are no saved personas or history.
The only thing written to the database is the date and the total number of checks that day across all users (there is a daily cap, shared with the Japanese Business Tone Check, to stay within the free tier). To prevent rapid repeat submissions we count requests per IP address in server memory only; nothing is saved and the count is gone within 10 minutes.
We recommend masking unreleased product names and confidential figures before pasting.
POST JSON ({"text": "…", "industry": "shigyo" | "ec" | "saas"}) to /lp-persona-check/api/check to get the same result as JSON (no auth, nothing stored; the daily cap and per-IP limit are shared with this page).