Query DNS records for any domain. Supports A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, CAA, PTR and NAPTR. Enter an IP address for a reverse lookup (PTR) — the record type will switch automatically. Check All adds DMARC, DKIM (common selectors), MTA-STS, TLS-RPT and BIMI with a mail-security summary.
History
Analyze SSL/TLS certificates — also expired, self-signed or otherwise broken ones —, the chain as the server sends it, TLS version, CAA records and security headers.
Enter a domain and click "Check SSL" to analyze the certificate.
History
Trace HTTP redirect chains step by step. Shows status codes, IP addresses, SSL status, and timing for each hop.
Enter a URL and click "Trace Redirects" to follow the redirect chain.
History
Parse and analyze URL components: protocol, hostname, port, path, query parameters, and more.
Enter a URL and click "Parse URL" to analyze its components.
URL Slug Generator
Convert any text to a clean, URL-friendly slug. Handles German umlauts (ä→ae, ö→oe, ü→ue, ß→ss) and strips all other special characters. Generated live as you type.
History
Generate a valid SPF TXT record for your domain. Configure authorized mail servers, IP addresses, and providers — the record updates live.
include:.DNS Entry
| Type | TXT |
| Host / Name | @ (or your domain) |
| Value | v=spf1 mx ~all |
| Zone file / split | |
| TTL | 3600 |
How to deploy
- Copy the generated record above.
- Log in to your DNS provider (Cloudflare, Route 53, etc.).
- Create a TXT record for @ (or your domain).
- Paste the record value and set TTL to 3600.
- Wait for DNS propagation (up to 48 hours).
- Use Verify DNS above to check your TXT record.