Reference Library
12 curated reference pages — lookups, specifications and cheat sheets for quick access while you work.
Base64 Character Table Reference
Complete Base64 encoding character table with all 64 characters, their indices, binary values, and ASCII codes.
ISO 3166-1 Country Codes Reference
ISO 3166-1 country codes including alpha-2, alpha-3, and numeric codes for 55+ common countries.
CSS Named Colors Reference
All CSS named colors with hex and RGB values.
ISO 4217 Currency Codes Reference
ISO 4217 currency codes with names, symbols, and issuing countries for 40+ common currencies.
File Extensions Reference
Common file extensions with MIME types, categories, and descriptions for quick lookup.
HTML Entities Reference
Common HTML character entities with names, decimal and hex codes.
HTTP Status Codes Reference
Complete reference of HTTP status codes with descriptions, categories, and usage examples.
JSON Syntax Reference
Complete JSON (RFC 8259) syntax reference with data types, grammar rules, examples, and common errors.
MIME Types Reference
Common MIME types (Internet media types) with file extensions and descriptions.
Regular Expressions Cheat Sheet
Quick reference for regular expression syntax including characters, quantifiers, anchors, groups, and common patterns.
IANA Time Zones Reference
IANA time zone identifiers with UTC offsets and descriptions for 40 common time zones worldwide.
Unix Timestamp Reference
Unix timestamp reference with common milestones, value ranges, and conversion rules.