Services
100% Free Online Tools • No Signup Required
Instantly diagnose DNS, WHOIS, SSL, SPF, DKIM and DMARC issues with our free online checkers. Built for developers, sysadmins and website owners who need clear answers fast.
Six trusted diagnostic tools used by webmasters every day.
Check your domain's DNS records instantly. Look up A, AAAA, CNAME, MX, TXT, NS, CAA and SOA records, and verify whether DNS changes are propagating correctly across the internet.
Check DNS records nowMake sure your domain is pointing to the right place. If your website or email isn't working as expected, this tool helps you quickly spot what might be wrong. It shows how your domain is seen around the world, so you can catch issues with updates, downtime, or misconfigurations before they impact your visitors.
A WHOIS lookup helps you inspect public domain registration details such as the registrar, creation date, expiry date, nameservers and domain status. This is useful when checking ownership information, validating domain setup, or preparing a domain transfer.
Look up domain registration information instantly. Check registrar details, WHOIS server, registrant organization, creation date, expiry date, nameservers and domain status.
Check WHOIS information nowVerify that your SSL certificate is active, valid, and correctly configured. This tool helps you detect issues like expiration, misconfiguration, or missing domain coverage, ensuring secure HTTPS connections and preventing browser warnings that could undermine user trust.
Verify expiration date, issuer, subject, subject alternative names (SANs), wildcard coverage and supported TLS versions in seconds.
Check SSL certificate nowWe're always looking to improve! If you have an idea for a new tool or feature, we'd love to hear from you. Your feedback helps us build better solutions.
Send Feedback
Special Offer: Get a FREE domain name (.NL, .BE, .EU, or .COM) when you sign up for any hosting plan!
SSL Included Daily Backups Free Email
Explore PlansVerify your record syntax, analyse mechanisms, inspect include chains, detect misconfigurations and validate your email authentication setup.
Check SPF record nowSender Policy Framework (SPF) tells the world which servers are allowed to send email for your domain. A properly configured SPF record keeps your messages out of spam folders and protects your sender reputation.
DomainKeys Identified Mail (DKIM) confirms that your domain is properly signing outgoing emails. This helps recipients verify message integrity, improves deliverability, and protects against spoofing. Run a quick check to identify misconfigurations or missing records that could impact trust and inbox placement.
Validate your DKIM record syntax, inspect selectors, verify signatures, and detect configuration issues to ensure your email authentication is correctly implemented.
Check DKIM record nowVerify your policy syntax, analyse alignment settings (SPF/DKIM), inspect reporting URIs, detect misconfigurations, and validate your domain's email authentication and fraud protection setup.
Check DMARC record nowDomain-based Message Authentication, Reporting & Conformance (DMARC) protects your domain against spoofing and phishing. It controls what happens to emails that fail authentication checks — improving deliverability and protecting your brand reputation.
Quick answers about our free DNS, WHOIS, SSL and email checker tools.
