Free Developer Tools
for DNS, Email & Web Security
AI-Powered Diagnostics • Instant Results • Actionable Recommendations
Enter a domain and start scanning. No registration required.
How It Works
Get a clear diagnosis of your web configuration in just three steps.
Enter Domain
Enter your domain in the input field. Scans are fully anonymous and require no account.
Automated Audit
Our engine scans DNS records (MX, SPF, DMARC) and rates configs against security standards.
Read AI Report
Receive a comprehensive evaluation and actionable tips to optimize deliverability and security.
Available Diagnostic & Developer Tools
Here is a curated selection of our most popular utilities. The suite contains 45 free tools for webmasters, developers, and administrators.
🌐 Network & DNS →
DNS Traversal (Trace)
Traces the DNS resolution path from root servers to the authoritative name server.
Launch ToolWHOIS & RDAP Lookup
Queries registration data, expiration date, and name servers of a domain (prefers RDAP).
Launch ToolPageSpeed Check
Measures loading times, performance, SEO, and Core Web Vitals via Google PageSpeed Insights.
Launch Toolrobots.txt & Sitemap Checker
Analyzes robots.txt syntax, sitemap.xml structure, and tests declared URLs.
Launch Tool🔑 Security & SSL →
SSL/TLS Check
Analyzes SSL/TLS certificates, certificate chains, expiration dates, and ciphers.
Launch ToolSecurity Header Check
Checks HTTP security headers (HSTS, CSP, X-Frame-Options) and provides server fixes.
Launch ToolMail Deliverability Suite
Performs a complete audit (SPF, DKIM, DMARC, BIMI, MX, SMTP, and DNSBL) for emails.
Launch ToolDomain Health Score
Aggregates DNS, SSL, Security Headers, PageSpeed, and Email Deliverability into a single score with AI recommendations.
Launch ToolBase64 Encoder/Decoder
Encodes text into Base64 or decodes it back to plain text.
Launch ToolEncoder/Crypto Pipeline
Chains local encode, decode, JSON, text, and SHA-256 steps into reusable recipes.
Launch ToolHash Generator & BCrypt
Creates MD5, SHA-1, SHA-256, SHA-512, PBKDF2, and server-side BCrypt hashes.
Launch ToolJWT Decoder
Decodes JSON Web Tokens (JWT) and visualizes payload, header, and expiration times.
Launch ToolUUID Generator
Generates cryptographically secure Universally Unique Identifiers (UUID v4).
Launch Tool🛠️ Developer Utilities →
Regex Tester
Tests regular expressions in real-time with match highlighting and capture groups.
Launch Tool