Free Tools for Webmasters
Security, SEO, DNS, and developer tools. No signup required.
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Security Headers Checker
Instantly analyze your website's security headers and get actionable recommendations. See how your site scores against industry best practices.
- Check all major security headers
- Get a letter grade (A+ to F)
- Copy-paste fix suggestions
Security Score
DNS Lookup
Query any domain's DNS records instantly. View A, AAAA, MX, TXT, NS, CNAME, and SOA records in one place.
- All record types in one query
- Check propagation status
- Debug email delivery issues
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JSON Formatter
Paste messy JSON, get beautiful formatted output. Validate syntax, collapse/expand nodes, and copy with one click.
- Syntax validation & error highlighting
- Minify or prettify with one click
- Works entirely in your browser
{
"name": "Webmaster Zone",
"tools": 36,
"categories": ["Security","SEO","Developer"],
"free": true}Built for Every Webmaster
Whether you're a solo blogger or managing enterprise sites
Developers
Debug headers, validate JSON, encode/decode data, and generate configs without leaving your browser.
Developer Tools →SEO Professionals
Check meta tags, preview SERP snippets, generate sitemaps, and analyze your content's SEO health.
SEO Tools →Security-Conscious
Audit security headers, verify SSL certs, block AI crawlers, and generate CSP policies.
Security Tools →Latest Guides
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AI Crawler Traffic Statistics (2025)
Data on AI crawler activity, blocking rates, and how the landscape is changing. Numbers from real server logs.
Complete List of AI Crawlers (2025)
A comprehensive, regularly updated reference of AI web crawlers and their User-Agent strings. Know what's hitting your server.
Essential Tools for Network Administrators
A collection of free tools for network admins, sysadmins, and webmasters. IP management, subnet calculators, and more.
Block AI Crawlers
We track 20+ AI crawlers from companies like OpenAI, Anthropic, Google, and more. Generate robots.txt or .htaccess rules to protect your content.
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