Keyword Density
Analyse word and phrase recurrence from text or a URL.
Select a tool to get started.
Analyse word and phrase recurrence from text or a URL.
List images on a page and check ALT & Title attributes.
Count characters and length for meta titles and descriptions.
Generate placeholder content for layouts and mockups.
See how a title/description will likely truncate in Google.
List the top ten results from Google for a specific search.
Generate schema data for inclusion within web pages).
Display detected schema information from within a page (day mode).
Display detected schema information from within a page (night mode).
Generate numbers for various UK Lotteries
Find the IP address from a domain name
Find out where an IP is hosted in the world
Test the MX records for a domain
Test an email by sending it to this tool
The main schema website with documentation and information.
Validate all Schema.org-based structured data that's embedded in web pages.
Test your structured data to see which Google rich results can be generated from your page.
A map of all UK counties.
Visualise DNS and DNSSEC chains for a domain.
Multi-tool: WHOIS, reverse IP, traceroute, DNS, and more.
Full DNS health report: delegation, glue, NS, MX, SOA, etc.
Global DNS propagation checks for A/AAAA/CNAME/MX/TXT and more.
Multi-location ping, traceroute, HTTP headers, and DNS tests.
Check if a domain or IP appears on RBL blacklists.
Inspect DMARC, SPF, and DKIM records clearly.
Deliverability metrics for Gmail (requires login & domain setup).
Deep SSL/TLS config analysis and grading for a host.
Check HSTS, CSP, and other HTTP security headers.
Holistic HTTPS, DNSSEC, and SMTP TLS analysis for domains.
Check email addresses or domains against known breaches.
Performance testing with waterfalls and recommendations.
Advanced profiling, filmstrips, and Core Web Vitals detail.
Google CWV metrics and performance recommendations.
Quick external test of load time and page size.
Geolocation, ASN, and hosting details for IPs and ranges.
ASN and prefix history, routing, and reputation data.
Visualise BGP route changes for ASNs/prefixes over time.
Test, debug, and share regular expressions quickly.
Validate, pretty-print, and inspect JSON payloads.
Human-friendly cron expression editor and explainer.
Swiss-army knife for encoding, decoding, and data wrangling.