Free, fast website checks. No signup.
Tesselyn builds small, honest tools for site owners, agencies and online stores. Run a single check here for free. If you need to check hundreds or thousands of sites, run the same checks in bulk on Apify for a few cents.
Free tools
AI-search readiness checker
Can GPTBot, ClaudeBot, PerplexityBot and Google-Extended crawl your site? We read your robots.txt rules and check llms.txt and your sitemap.
GPSR product-safety text generator
Generate manufacturer, EU Responsible Person and warning text for product pages in all 24 EU languages.
Domain and email health checker
SPF, DMARC, DKIM, MX, DNSSEC, CAA, HTTPS redirect and HSTS, with a fix for each issue.
Broken link checker (one page)
Find broken links and redirects on any single page. Up to 40 links per check.
Need it in bulk? The same checks run on Apify as pay-per-result tools:
AI Search Readiness Auditor, $0.01 per domain · Broken Link & Redirect Checker, $0.001 per link
Tesselyn at a glance
| What it is | Free online tools for AI-search readiness, domain and email health, broken links and EU GPSR product-safety text |
|---|---|
| Price | Free for single checks, no signup. Bulk on Apify: $0.01 per domain (AI Search Readiness Auditor), $0.001 per link (Broken Link & Redirect Checker) |
| Who it's for | Website owners, SEO and marketing agencies, developers and online stores selling into the EU |
| Data | Checked domains and URLs aren't stored. No cookies. The GPSR generator runs in your browser |
| Operated by | HevraBest Group Ltd (Israel, company no. 517045183). Tesselyn is its brand for web tools |
Why Tesselyn
- Honest results. We tell you what a check can and can't prove. For example, llms.txt is optional and most AI crawlers don't read it yet, so we report it but we don't oversell it.
- Nothing to install, no account. We don't store what you check. See our privacy policy.
- Bulk when you need it. When a free check isn't enough, the same logic runs at scale on Apify.
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FAQ
What is Tesselyn?
Tesselyn is a set of free, no-signup web tools for site owners, agencies and online stores: an AI-search readiness checker, a domain and email health checker, a one-page broken link checker and an EU GPSR product-safety text generator. Tesselyn is a brand of HevraBest Group Ltd, a company registered in Israel.
Is Tesselyn free?
Yes. Every single check on tesselyn.com is free and needs no account. For bulk work, the same checks run on Apify with pay-per-result pricing: the AI Search Readiness Auditor costs $0.01 per domain and the Broken Link & Redirect Checker costs $0.001 per link checked.
Does Tesselyn store the domains or URLs I check?
No. Submitted domains and URLs are used only to run the check and return the result. They are not stored in a database. The GPSR generator runs entirely in your browser, and the site sets no cookies.