Website Speed Tests
- PageSpeed Insights TestRun Google PageSpeed Insights on your URL and understand the score, the lab numbers and the field data, plus what to change first when the result is poor.
- WebPageTestRun WebPageTest on your page for a request by request breakdown, filmstrip view and repeat view results that show what your visitors actually see while waiting.
- SpeedVitals TestRun SpeedVitals on your URL to measure Core Web Vitals across several test locations and devices at once, with a layout shift visualiser.
- TTFB TestTest Time to First Byte on your URL from multiple regions and find out whether slow pages are caused by your server, your host or your distance from visitors.
- Is My Page Cached?Check whether your page is being served from cache, which caching layer answered, and what your cache headers are telling browsers and CDNs to do.
- GTmetrix Speed TestRun a GTmetrix speed test on your URL and learn what the grade, the Structure score and the waterfall chart are telling you about your page.
- Yellow Lab Tools TestRun Yellow Lab Tools on your URL to grade page weight, DOM complexity, JavaScript behaviour, CSS bloat and bad practices in your front end code.
- KeyCDN Speed TestRun the KeyCDN speed test on your URL to see load time, page size and a request waterfall measured from test servers around the world.
- DebugBear Speed TestRun the free DebugBear speed test on your URL for Core Web Vitals, a request waterfall, and a clear breakdown of what is delaying your largest content paint.
Website SEO Tests
- Meta Tags CheckerCheck the meta tags on your URL, including title, meta description, canonical, robots directives and social tags, and see what search engines read.
- Google Rich Results TestTest whether your page qualifies for rich results in Google search, which structured data types were detected, and what errors are blocking them.
- Schema Markup ValidatorValidate the schema.org structured data on your URL, see every type and property detected, and find the errors keeping your markup from being understood.
Social Media Optimization
- Social Share PreviewPreview how your URL will appear when shared on Facebook, X, LinkedIn, Slack and Discord, and catch missing images or wrong titles before you post.
- Facebook Sharing DebuggerRun the Facebook Sharing Debugger on your URL to see the Open Graph tags Facebook read, and clear its cache so an updated image or title appears.
- LinkedIn Post InspectorRun the LinkedIn Post Inspector on your URL to see the preview LinkedIn will show and force it to re-read your page after you change the image or title.
- Open Graph CheckerCheck the Open Graph tags on your URL and preview the share card for Facebook, X, LinkedIn and Pinterest, with a list of any tags that are missing.
- Meta Tags PreviewPreview how your URL appears in Google results and on social platforms at once, and edit the tags live to see how a rewrite would look.
Core Web Vitals
- PageSpeed Insights TestRun Google PageSpeed Insights on your URL and understand the score, the lab numbers and the field data, plus what to change first when the result is poor.
- WebPageTestRun WebPageTest on your page for a request by request breakdown, filmstrip view and repeat view results that show what your visitors actually see while waiting.
- SpeedVitals TestRun SpeedVitals on your URL to measure Core Web Vitals across several test locations and devices at once, with a layout shift visualiser.
- GTmetrix Speed TestRun a GTmetrix speed test on your URL and learn what the grade, the Structure score and the waterfall chart are telling you about your page.
Website Accessibility Checkers
- WAVE Accessibility TestRun the WAVE accessibility checker on your URL to find contrast failures, missing alt text, unlabelled form fields and heading structure problems.
Website Security Checks
- Security Headers TestScan your URL for HTTP security headers and get a grade from A to F, with an explanation of each missing header and what it protects against.
- SSL TestRun the Qualys SSL Labs test on your domain for a full grade on your certificate, protocol support, cipher strength and known TLS vulnerabilities.
- HSTS Preload CheckCheck whether your domain qualifies for the HSTS preload list, which tells browsers to only ever connect to your site over HTTPS.
- Hardenize Domain ReportRun a Hardenize report on your domain for a single view of DNS, HTTPS, email authentication and security headers, with SPF, DKIM and DMARC included.
- HTTP Observatory ScanScan your site with the Mozilla HTTP Observatory for a security score covering headers, cookies, cross origin policy and subresource integrity.
- Google Safe Browsing CheckCheck whether Google Safe Browsing has flagged your URL as unsafe, which is what triggers the red warning screen in Chrome and most other browsers.
- Sucuri SiteCheck ScanScan your URL with Sucuri SiteCheck for malware, defacement, injected spam, outdated software and blocklist status across major security vendors.
Other
- DNS Propagation CheckCheck your DNS records from servers around the world to see whether a recent change has propagated, and find out where the old record is still cached.
- Wayback Machine LookupLook up archived snapshots of your URL in the Internet Archive Wayback Machine to recover old copy, check past designs or find pages you deleted.
Or skip the reading and run every test on your URL from the full list.