Free website checker tools
Single-purpose checks for when you want one answer fast. Every tool is free, needs no signup and explains how to fix what it finds.
Security Headers Checker
Test HSTS, CSP, X-Frame-Options and the other HTTP security headers.
Meta Tag Checker
Check title, meta description, canonical, robots and viewport tags.
Open Graph Checker
Preview how a link looks on Facebook, LinkedIn, X and WhatsApp.
Mobile-Friendly Test
Check viewport, zoom, responsive layout and font sizes on phones.
Website Accessibility Checker
Automated WCAG checks: alt text, labels, landmarks, link text, zoom.
Website Speed Test
Core Web Vitals and load speed on a simulated phone, in plain English.
Heading Structure Checker
See the H1–H6 outline of a page and find skipped or missing headings.
Image Alt Text Checker
List every image on a page with its alt text and flag the bad ones.
Schema Markup Checker
Find JSON-LD and Microdata, check syntax and recommended properties.
Check everything at once
The full PageScore audit covers performance, SEO, security, accessibility and mobile in 30 seconds.