33 tools · organized by the job they do
Free Webmaster & Website Tools
Inspect markup, domains, headers, links and browser-facing details that keep websites understandable. Browse focused groups, search by outcome and compare adjacent workflows before choosing where to begin.
Suggested starting points
See all 33 Begin with a focused webmaster task
These editorial selections cover several common entry points without implying usage rankings.
Broken Link CheckerCheck broken link and surface details that need review.Robots.txt GeneratorCreate a focused robots.txt from the details and goal you provide.Robots.txt TesterCheck robots.txt and surface details that need review.Redirect CheckerCheck redirect and surface details that need review.HTTP Header CheckerCheck http header and surface details that need review.Favicon CheckerCheck favicon and surface details that need review.
Complete category catalogue
Explore all 33 webmaster tools
No tools match those filters. Try a broader phrase or another task group.
HTML, CSS & JavaScript Utilities
9Domain, DNS, IP & Hosting
8URL, QR & Browser Utilities
7Website Inspection & SEO Utilities
9Choose with context
A practical guide to webmaster & website workflows
The best tool is the one that matches the input, decision and destination—not simply the broadest label.
Inspect the layer that matches the problem
A page combines markup, styles, scripts, network responses, domain configuration and browser behavior. Use a formatter or viewer for source text, a header or redirect checker for HTTP behavior, and DNS or certificate tools for infrastructure questions. One check rarely describes the whole site.
Read remote results with context
DNS answers vary by resolver and caching, redirects can form chains, and headers may differ by location, user agent or authentication. Record the requested URL, time and environment when diagnosing a problem. Never interpret a public IP result as precise personal location.
Improve the page users actually receive
Headings, metadata, links, mobile behavior and structured information affect usability and discovery. Extraction tools reveal what is present; they do not decide whether the content is useful. Pair technical checks with accessibility testing, browser testing and official standards guidance.
Common outcomes
What you can work on
Tool outputs support review and decision-making. They do not replace professional judgment, source verification or the rules of the platform receiving your work.
Choose a task-specific utility, check the input requirements, and review the result before using it downstream.
Choose a task-specific utility, check the input requirements, and review the result before using it downstream.
Choose a task-specific utility, check the input requirements, and review the result before using it downstream.
Choose a task-specific utility, check the input requirements, and review the result before using it downstream.
Processing should match the task
Catalogue search runs locally in your browser. Functional tools will identify when work can stay browser-local and when a server, authorized public data source or semantic service is necessary. No universal privacy or outcome guarantee is implied.
Continue the workflow
Related categories
Move into adjacent work without losing the context of the task you started.
Helpful answers
Webmaster & Website questions
Clear guidance for choosing and using the catalogue responsibly.
What is the difference between source code and the rendered page?
Source is the delivered markup; scripts and browser behavior can change the final document users interact with.
Why can DNS results differ?
Resolvers cache records, propagation takes time and different record types or locations can return different answers.
What does a redirect checker reveal?
It can show status codes and destinations across a redirect chain, helping identify loops, extra hops or unexpected targets.
Can an IP lookup identify a person?
No. IP geolocation is approximate and usually describes a network or region, not a verified individual.
Is a valid SSL certificate enough to prove a site is safe?
No. It protects transport and identity binding for a hostname; it does not validate every page, claim or download.
What should a mobile-friendly check cover?
Viewport configuration, responsive layout, readable text, touch targets, overflow and usable interactive controls.
Can a URL shortener expose private data?
Short links redirect to another URL and may be logged by the provider. Avoid placing secrets or sensitive query data in links.
How is this category different from Developer Tools?
Webmaster tools inspect websites and network-facing behavior; Developer Tools focus on code, data formats, encoding and testing utilities.
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