DNS Blade — 80+ Free DNS, Network & Developer Tools
Query 41 global DNS resolvers in parallel, verify SSL certificates, grade email deliverability (SPF, DKIM, DMARC), inspect WHOIS records, and access developer utilities. Blazing fast, zero logs, runs entirely on Cloudflare's edge.
DNS Propagation
Query 41 global vantage points in parallel with live NDJSON streaming.
DNS Record Lookup
Query A, AAAA, MX, TXT, CNAME, SOA, and NS with DNSSEC verification.
WHOIS & Domain Intel
Authoritative RDAP registrar data, creation dates, and expiration alerts.
SSL / TLS Certificate
Inspect full certificate chains, SANs, cipher suites, and expiry dates.
DNS
Query records, verify propagation, and inspect authoritative nameservers.
Query 20+ global DNS resolvers in parallel.
Look up any DNS record type for a domain.
Root → TLD → Authoritative iterative resolution trace.
Find authoritative nameservers.
Mail exchange servers and priority.
Resolve CNAME aliases.
IP → hostname (PTR).
Resolve A / AAAA records.
Enumerate subdomains via CT logs.
Which CAs can issue TLS certs for a domain.
Zone serial, refresh, retry, expire timers.
All TXT records — SPF, DKIM, DMARC & verification tokens.
SIP, XMPP, Matrix, Minecraft & custom SRV records.
DS, DNSKEY & chain-of-trust validation.
RFC 9460 service binding — ALPN, ECH, IP hints.
TLS certificate association records (DANE).
ENUM & SIP URI service discovery.
Detect *.domain wildcard DNS records.
AAAA coverage on web, mail & DNS — graded A–F.
Bulk lookup — 12 record types in one query.
Detect Google, M365, Zoho + SPF senders.
Domain
Availability, WHOIS, age, and validation for any top-level domain.
Email deliverability
SPF, DMARC, DKIM, BIMI, MTA-STS, headers and blacklist checks.
0–100 deliverability audit for SPF, DMARC & MX.
Parse & validate SPF record.
Parse & validate DMARC policy.
Build a DMARC TXT record.
Query DKIM public key for a selector.
Look up BIMI record and logo.
Parse raw email headers & delivery hops.
Check IP against 20+ DNSBL zones.
SMTP TLS enforcement (RFC 8461) + reporting.
IP & Network
Geolocate, ASN, subnet calculator, and IP conversions.
Geo, ASN, ISP, org for any IP.
Check open ports (22, 80, 443, 3306, 5432).
See your public IP, ISP, geo.
See your ISP and connection info.
Parse your browser & OS.
AS number, prefixes, peers.
CIDR, mask, hosts, ranges.
IPv4 ↔ IPv6, decimal, hex, binary.
Web & HTTP
Security headers, redirects, SSL, CMS detection and generators.
Interactive 1xx–5xx codes & Cloudflare edge errors.
Response headers, status, TLS.
Follow the redirect chain.
TLS cert issuer, validity, SANs.
Every TLS cert ever issued for a domain (crt.sh).
Grade HSTS, CSP, X-Frame-Options A–F.
Detect WordPress, Shopify, etc.
Build a robots.txt file.
Generate a sitemap.xml.
Developer
JSON formatter, regex playground, JWT decoder, and hashes.
Convert & validate YAML and JSON configs.
Image & file to Base64 and Data URI generator.
Visual editor for Markdown & HTML tables.
HEX ↔ RGB ↔ HSL with WCAG contrast checker.
Pretty-print, validate & minify JSON.
Live JavaScript regex playground.
Percent-encode & decode URLs.
SHA-1/256/384/512 via Web Crypto.
Inspect JWT header, payload & claims.
Sign JWTs with HS256/384/512 in your browser.
Lint Content-Security-Policy for unsafe patterns.
Explain cron in English + preview next 10 runs.
UUID v4/v7, ULID, NanoID, KSUID — batch generate.
Convert curl to fetch, axios, Python, Go, PHP.
Unix epoch ↔ human date.
SEO-friendly URL slugs.
Campaign URLs for GA4, Plausible, Fathom.
Text & Writing
Word counters, case converters, text diff, and lorem ipsum.
Utilities
Password strength, QR code generator, and MAC address lookup.
Power Tools
Bulk domain verification and multi-domain comparison suites.
More
Browse everything or peek at the roadmap.
Why Choose DNS Blade?
A high-precision, no-nonsense diagnostic suite built to replace slow, ad-ridden legacy lookup portals.
Parallel Edge Engine
Every query fans out asynchronously across Cloudflare Workers for sub-second responses worldwide.
Zero Logging & Privacy
We do not log IP lookups or domain queries. No tracking, no user accounts, and zero advertising.
Authoritative & Live
Direct upstream DNS over HTTPS, real-time RDAP registries, and Certificate Transparency log sync.
41+ Global PoPs
True localized DNS propagation checks with EDNS client subnet routing across NA, EU, APAC, and LATAM.