What 0x checks
39 checks across 10 areas. On every page with 0x Deep.
0x loads your site in a real browser, the way visitors and search engines see it, then an AI reviews the design. It tells you in plain English what's costing you signups, trust and rankings, and what to fix first.
SpeedResponse time, page weight, compression and real load speed.
SEO & metadataTitle, description, social previews, canonical, structured data, sitemap.
AccessibilityHeadings, alt text, contrast, form labels and link text.
MobileMobile viewport and favicon.
Security headersHTTPS, HSTS, CSP, clickjacking and MIME-sniffing protection.
Link healthBroken internal links and unsafe external links.
TrustContact details, privacy policy and social proof.
InteractivityWe click sample buttons in a real browser to check they respond.
AI readinessAI crawler access and llms.txt, so assistants can find and cite you.
Domain & emailSPF, DMARC, CAA and DNSSEC on your domain.