Web page to clean Markdown and AI crawler robots.txt checks, free without a key (rate limited).
TidyTools API is a free Development API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.

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Yes. The TidyTools API is listed in the Development category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The TidyTools API requires no authentication, so you can start making requests without signing up.
Yes. The TidyTools API supports CORS, so front-end JavaScript can call it directly.
Yes. The TidyTools API is served over HTTPS, so it's safe to use in production.