Free DNS & Email Tools
Comprehensive suite of free tools to analyze, generate, and troubleshoot DNS and email configurations.
🌟 Featured & Popular
Our newest tool and the ones our users reach for most often.
📧 Email Authentication
Configure and validate email security to protect your domain from spoofing and phishing.
SPF Record Generator
Build a custom SPF record by selecting your email providers. Prevent email spoofing with properly configured sender policies.
Generate SPF →DMARC Record Generator
Create a DMARC policy step-by-step. Choose enforcement levels, reporting options, and alignment settings.
Generate DMARC →SPF Validator
Validate your SPF record syntax, check DNS lookup limits, and visualize the include tree.
Validate SPF →DMARC Checker
Check your DMARC record, parse policy settings, and get recommendations for improvement.
Check DMARC →DKIM Lookup
Look up DKIM records by selector and verify key configuration for email authentication.
Check DKIM →Email Auth Summary
Get a complete overview of SPF, DKIM, DMARC, MTA-STS, and BIMI with a single lookup.
Check All →BIMI Checker & Generator
Check BIMI records to display your brand logo in emails. Generate valid BIMI records with logo validation.
Check BIMI →MTA-STS Checker
Verify MTA-STS configuration to enforce TLS encryption for incoming email and prevent downgrade attacks.
Check MTA-STS →TLS-RPT Checker
Check TLS Reporting configuration to receive reports about email encryption failures.
Check TLS-RPT →Email Header Analyzer
Parse and analyze email headers to trace delivery path, check authentication results, and diagnose delays.
Analyze Headers →DMARC Report Analyzer
Upload and parse DMARC aggregate reports (RUA) to identify SPF/DKIM alignment issues and email sources.
Analyze Reports →Email Blacklist Checker
Check if your IP or domain is listed on major email blacklists affecting deliverability.
Check Blacklists →🌐 DNS Tools
Query, analyze, and monitor DNS records across global nameservers.
DNS Propagation Checker
Check DNS records from multiple global locations to verify propagation status after changes.
Check Propagation →DNS TTL Checker
View TTL values for all DNS records and get recommendations for planning DNS changes.
Check TTL →Reverse DNS Lookup
Look up the hostname associated with an IP address via PTR records.
Reverse Lookup →IP Location Lookup
Look up the country and continent for an IP address using the GeoLite2 database.
Locate IP →DNS Record Comparison
Compare DNS records between two domains side-by-side to identify differences.
Compare DNS →DNS Nameserver Compare
Compare DNS records across two nameservers before migrating to a new DNS provider.
Compare Nameservers →CAA Record Checker
Check Certificate Authority Authorization records to see which CAs can issue certificates.
Check CAA →Subdomain Finder
Discover subdomains using common prefix enumeration and DNS queries.
Find Subdomains →WHOIS Lookup
Look up domain registration information including registrar, dates, and nameservers.
WHOIS Lookup →DNS Health Check
Comprehensive domain health audit — DNS records, email security, blacklist status, with scoring and recommendations.
Run Health Check →🔒 Security & SSL
Analyze certificates, security headers, and website security configurations.
🖥️ Website Analysis
Detect technologies, analyze redirects, and test HTTP protocol support.
SEO Scanner
Analyze title tags, meta descriptions, headings, technical SEO, and social tags. Get actionable recommendations.
Scan SEO →Tech Stack Detector
Identify web servers, frameworks, CDNs, and other technologies powering a website.
Detect Stack →Redirect Checker
Trace the complete redirect chain from a URL to its final destination.
Check Redirects →Open Graph Checker
Validate Open Graph and Twitter Card tags to improve social sharing previews.
Check Tags →HTTP/2 & HTTP/3 Test
Test whether a website supports modern HTTP protocols like HTTP/2 and HTTP/3.
Test HTTP →Robots.txt Analyzer
Analyze your robots.txt file, check which bots are blocked, and get code to block AI crawlers.
Analyze →Accessibility Checker
Check your website against WCAG 2.2 accessibility guidelines. Find issues with images, forms, headings, and more.
Check A11y →📦 CMS Scanners
Deep analysis tools for popular Content Management Systems — detect versions, plugins, themes, and security issues.