All Tools
The complete list of WhoDNS tools, grouped by category. Press Ctrl+K to find one quickly.
DNS Check
Records, SPF, DMARC, DKIM and availability.
DNS Propagation
Record propagation across 8 global servers.
WHOIS Lookup
Owner, registrar and dates of a domain or IP.
DNSSEC Check
DNSSEC signing status and DS/DNSKEY records.
Subdomain Finder
Discover active subdomains via DNS probing.
A Record Query
Query A/AAAA via different resolvers.
PTR Lookup
Reverse DNS and the answering server.
Notes
Block-based notes: pages, databases, search & comments.
File Sharing
Upload files & direct link (login required).
Mail Tester
Email spam score, auth and blacklists.
Email Delivery Test
Check whether your mail lands in inbox or spam.
SPF/DMARC Builder
Build anti-spoofing email records easily.
Email Header Analyzer
Parse delivery path and SPF/DKIM/DMARC.
Blacklist (RBL)
Check an IP against email blacklists.
My IP
IP, location, ISP and country flag.
Speed Test
Your download/upload speed and ping to the server.
Ping Test
Host reachability via ICMP/TCP.
Port Check
Check if a TCP/UDP port is open.
HTTP Test
HTTP status, headers and response time.
Traceroute
Trace the path and per-hop latency.
Reverse IP
PTR, owner/ISP and open ports of an IP.
Redirect Check
Follow redirect chains and count hops.
Preview by IP
Preview a site on a new server — screenshot.
CDN & WAF Detection
Fingerprint the CDN/WAF behind a domain.
Subnet Calculator
Network, mask and broadcast from a CIDR.
SSL Check
Status, expiry, chain and trust warnings.
TLS Scan
Supported TLS versions and cipher.
Security Headers
Inspect and grade a site's headers.
Certificate Decoder
Decode full details of a certificate.
CSR Decoder
Decode subject, SANs and key details.
CSR Generator
Generate CSR and key with SANs.
Cert ↔ Key
Check a cert matches a private key.
CSR ↔ Key
Check a CSR matches its key.
PFX Builder
Bundle cert and key into PFX.
PFX Decoder
Extract cert, key and chain from PFX.
Base64 Encoder
Encode/decode Base64 in your browser.
Hash Generator
Compute MD5, SHA-1/256/512 hashes.
Password Generator
Strong random passwords, secure RNG.
JWT Decoder
Decode a JWT header and payload.
URL Encoder
Percent-encode/decode text for URLs.
Punycode/IDN
Convert IDN domains to xn-- and back.
htpasswd Generator
Generate an .htpasswd line (bcrypt/APR1).
UUID Generator
Generate random UUID v4 identifiers.
Redirect Generator
Build htaccess & Nginx redirect rules.
Essential Plugins
Download popular plugins without repo access.
WP Toolkit
Build wp-config and download WordPress.