HTTP tools

Quick-reference collection of online and CLI tools for HTTP inspection, DNS lookups, SSL analysis, and local development.

HTTP

• httpbin — returns request/response data as JSON; useful for testing HTTP clients and inspecting headers, auth, and redirects
• httpie — command-line HTTP client with human-friendly syntax; alternative to curl with color output and JSON support
• GeoIP — shows HTTP request details and GeoIP information for the incoming connection

Favicon

• Favicon Grabber — fetches favicons from any domain via a simple API

DNS

• DIG — web-based DNS lookup tool from Google’s Admin Toolbox; supports all record types

Local development

• Slim — CLI that gives localhost a local HTTPS domain (.test, .loc, .dev) or a public URL via slim.show; supports path-based routing, WebSocket, HMR, and per-project config via .slim.yaml

SSL certificates

• SSL Labs — grades SSL/TLS configuration of any public HTTPS server; checks protocol support, cipher suites, and certificate chain
• crt.sh — searches Certificate Transparency logs; useful for finding all certificates issued for a domain
• HTTPS Transparency Report — Google’s searchable database of certificates logged via Certificate Transparency