See what ChatGPT, Claude, Perplexity and Google actually get from your site
Free SEO and developer tools that run in your browser. No accounts, no paywalls, no upsells.
Stage
Startup
Startup
Founded
2026
2026
Based in
US
Not given
Pricing model
Freemium
Free
Pricing
Free scans with no account. One site: fix service $100 once with 30 days included, then Watch at $29 per month for up to 3 sites. Multiple sites: Developer API at $99 per month for 2,000 scans, Growth at $499 per month for 20,000 scans, or Agency at $249 per month for 40 domains. Add-ons: Evidence $
Not given
Key features
Free A–F audit with no signup required
Tests 13 crawler identities including GPTBot, ClaudeBot, PerplexityBot, and Googlebot
Monitors sites twice daily with regression alerts
Signed, offline-verifiable answers using Ed25519 keys
Checks machine files: robots.txt, llms.txt, agents.md, and structured data
Implementation service to fix crawler access issues for $100
Published rulebook with 106 publicly accessible rules
API for agencies and tools measuring multiple sites
Browser extension showing how crawlers see your homepage
Blockchain-anchored daily seal of measurements via Bitcoin
Meta / OG Tag Generator with live previews
JSON-LD Schema Generator for structured data
Robots.txt / Sitemap Validator with crawl-blocking detection
Redirect Chain Checker to trace and spot redirect loops
HTTP Header Checker to inspect response and security headers
JSON Formatter & Validator with error highlighting
Base64 Encoder/Decoder for text, images and files
Password Generator with entropy and crack-time scoring
QR Code Generator with custom colors and logo support
Invoice Generator supporting 30 currencies
What makes it different
Signed, offline-verifiable results anyone can check without trusting the company
Tests what AI models actually receive from your site, not just SEO rankings
Transparent, published rules that never change based on payment tier
Built for the agentic web as a verification layer for agents to act autonomously
No signup, accounts or paywalls required
Most tools run entirely in the browser with no data sent to servers
Built from real client SEO work, not generic API wrappers
Tools built on official specs and search engine documentation
Fast browser-based performance with no backend queue
CrawlCheck
Frost Rank