Small tools,
no nonsense.

Network & HTTP

• DNS lookup Query A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, SRV and PTR records against Cloudflare, Google, Quad9 or a resolver you choose. Shows TTLs, response codes and timings. curl kirkdiamond.com/tools/dns?name=example.com
• TLS certificate inspector Connect to any host and read back the certificate chain, expiry, SANs, key type, negotiated protocol and cipher, ALPN, OCSP stapling and which TLS versions the server still accepts. curl kirkdiamond.com/tools/tls?host=example.com
• IP, ASN & network lookup Who owns an address: reverse DNS, origin ASN and network name, announced prefix, country and the registry's own RDAP record. curl kirkdiamond.com/tools/ipinfo?q=1.1.1.1
• Request headers Echo every header your client sent, exactly as this server received it. Handy for debugging proxies, CDNs and load balancers. curl kirkdiamond.com/tools/headers
• What is my IP Your public address as the server sees it, plus any X-Forwarded-For chain in front of it. curl kirkdiamond.com/tools/ip
• HTTP status tester Return any status code from 200 to 599, optionally after a delay. For testing retries, timeouts and monitors. curl -i kirkdiamond.com/tools/status/429

In your browser

• JSON viewer & editor Paste JSON, browse it as a collapsible tree, edit keys and values in place, then copy it back out formatted or minified. local only
• JWT decoder Paste a token, read the header and claims. Flags expired tokens. Never leaves your machine. local only
• Base64 & URL codec Encode and decode Base64, Base64url and percent-encoding in both directions. local only
• Unix timestamp converter Seconds or milliseconds to ISO 8601 and local time, and back again. Live clock included. local only

Server-side tools pick their output format from ?format=html|text|json, then the Accept header, then the user agent. curl, wget and httpie get plain text by default. Outbound lookups are rate limited per visitor and only ever target public addresses.