Reference

HTTP Status Codes

A complete reference for HTTP response status codes — what they mean and when to use them.

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HTTP Headers

Complete reference for HTTP request and response headers — caching, CORS, security, auth, and more.

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HTTP Methods

Complete reference for HTTP request methods — GET, POST, PUT, DELETE, PATCH, QUERY, and the WebDAV methods.

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Port Numbers

Common TCP and UDP ports for web, email, databases, remote access, infrastructure, and development services.

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Character Encoding

Unicode, ISO-8859, Windows code pages, legacy encodings, and common encoding schemes.

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ASCII Table

Complete ASCII reference with decimal, hex, octal, binary, HTML entities, and character names for all 256 values.

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Regex Cheatsheet

Anchors, character classes, quantifiers, groups, lookarounds, flags, and common patterns for regular expressions.

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Cron Syntax

Special characters, @daily/@weekly strings, and common cron expression examples for scheduling tasks.

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