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Tools
DNS & Domains
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DNS & Domains
7 tools
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DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME, SOA and more. Fast server-side resolution.
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DNS Propagation
Compare DNS answers from public resolvers worldwide to spot stale or partial propagation.
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WHOIS Lookup
WHOIS for domains and IPs. .gr/.ελ via official FORTH registry; country TLDs (.de, .uk, .fr, .nl, .eu, …) use the right registry server. Batch up to 12.
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SPF / DMARC / DKIM
Check SPF, DMARC and DKIM records for a domain. Useful for email deliverability.
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SPF Generator
Build a valid SPF TXT record from includes, IPs, and policy — copy into DNS.
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MX Lookup
List MX hosts and priorities for a domain — quick mail routing checks.
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DMARC Generator
Build a DMARC TXT record for _dmarc with policy, reporting URI, and alignment options.
IP & Network
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IP & Network
3 tools
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My IP & Headers
See your public IP, geolocation, ASN, ISP and incoming HTTP headers.
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IP Lookup
Lookup any IP address for location, ASN, organization and reverse DNS.
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Reverse DNS
Find the hostname(s) associated with an IP address.
Web & HTTP
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Web & HTTP
4 tools
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HTTP Headers
Fetch and inspect all response headers from any URL. Great for debugging.
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HTTP/2 Check
Probe whether a host speaks HTTP/2 or HTTP/1.1 over TLS with curl.
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SSL Certificate Checker
Check certificate chain, expiry, SANs, issuer and validity for any domain.
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Redirect Tracer
Follow HTTP redirects and see the full chain with status codes and locations.
Security
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Security
3 tools
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Security Headers
Check a site for important security headers (HSTS, CSP, X-Frame-Options, etc.).
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JWT Decoder
Decode JWT header and payload (no signature verification). For debugging tokens only.
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Password Strength
Estimate entropy and common-pattern risk. Runs entirely in your browser.
Utilities
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Utilities
6 tools
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JSON Formatter
Format, validate and minify JSON. Still one of the most used dev tools.
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Hash Generator
Generate cryptographic hashes. Useful for verification and integrity checks.
64
Base64 Encode/Decode
Encode or decode Base64 text in the browser.
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Cron Expression
Parse standard 5-field cron syntax into plain English schedule hints.
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Password Generator
Generate random passwords with configurable length and character sets.
uid
UUID Generator
Generate random UUIDs for IDs, correlation tokens, and test data.
Noostrid.com
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Tools
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DNS & Domains
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SPF Generator
📨
DNS & Domains
SPF Generator
Build a valid SPF TXT record from includes, IPs, and policy — copy into DNS.
Include domains (one per line)
IPs (one per line, optional ip4:/ip6: prefix)
Default policy
~all (softfail)
-all (fail)
?all (neutral)
Generate SPF
