# Tesselyn

> Tesselyn (tesselyn.com) is a set of free, no-signup web tools for website owners, agencies and online stores: an AI-search readiness checker (robots.txt rules for GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended and more, plus llms.txt, sitemap and noindex), a domain and email health checker (SPF, DMARC, DKIM, DNSSEC, HSTS), a one-page broken link checker and an EU GPSR product-safety text generator in 24 EU languages. Tesselyn is a brand of HevraBest Group Ltd (Israel).

Key facts:
- Price: free for single checks, no account needed
- Bulk versions on Apify (pay per result): AI Search Readiness Auditor $0.01 per domain; Broken Link & Redirect Checker $0.001 per link checked
- Privacy: checked domains and URLs are not stored; no cookies; the GPSR generator runs entirely in the browser
- Limits: broken link checker checks up to 40 links on one page; DKIM is checked on common selectors only; GPSR output is a template, not legal advice
- Operator: HevraBest Group Ltd, company no. 517045183, Israel. Contact: support@hevrabest.com

## Free tools
- [AI-search readiness checker](https://tesselyn.com/tools/ai-readiness-checker/): Free check: can GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot and Google-Extended crawl your site? Reads robots.txt and checks llms.txt, the sitemap and noindex.
- [Domain and email health checker](https://tesselyn.com/tools/domain-health-checker/): Free domain health check: SPF, DMARC policy, DKIM on common selectors, MX, NS, DNSSEC, CAA, HTTPS redirect and HSTS, with a fix for each issue.
- [Broken link checker](https://tesselyn.com/tools/broken-link-checker/): Find broken links (404, 5xx) and redirects on any web page. Free, up to 40 links per check. Whole-site crawl available on Apify.
- [GPSR product-safety text generator](https://tesselyn.com/tools/gpsr-text-generator/): Free generator for EU GPSR product page information: manufacturer, EU Responsible Person, product identifier and safety warnings in all 24 EU languages. Runs in your browser.

## Bulk tools on Apify
- [AI Search Readiness Auditor](https://apify.com/tesselyn/ai-search-readiness-auditor): audit robots.txt AI-bot access, llms.txt, sitemap and noindex for many domains at once, with a 0-100 score; $0.01 per domain
- [Broken Link & Redirect Checker](https://apify.com/tesselyn/broken-link-checker): crawl a whole site, follow redirect chains and check #anchors; $0.001 per link
- [All Tesselyn actors](https://apify.com/tesselyn)

## About
- [About Tesselyn](https://tesselyn.com/about/): who runs Tesselyn and contact details
- [Accessibility statement](https://tesselyn.com/accessibility/)
- [Privacy policy](https://tesselyn.com/privacy/)
- [Terms of use](https://tesselyn.com/terms/)

## Optional
- [Full text of all pages](https://tesselyn.com/llms-full.txt)