Powerful Network Tools
for Everyone

Query 20+ global DNS resolvers in parallel.

Look up any DNS record type for a domain.

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.

Check domain availability across 16 popular TLDs.

RDAP registration info — registrar, dates, NS.

How old is a domain?

Validate a domain name format.

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.

Geo, ASN, ISP, org for any IP.

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.

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.

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.

Words, characters, reading time.

UPPER, lower, Title, camel, snake…

Compare two texts line by line.

Placeholder text generator.

Morse, binary, base64.

Unicode font styles.

Strong random passwords.

Entropy, crack time & HIBP breach check.

URL, WiFi, vCard — PNG & SVG.

Random MAC addresses.

Vendor lookup from OUI.

Browse every tool.