Developer Utilities
Robust data transformers, security analyzers, and reference guides for software engineers.
Security & Privacy
API Key Generator
Generate secure, random API keys and secrets with custom prefixes.
Cipher Workshop
Encode and decode text with six historical ciphers — Caesar, ROT13, Atbash, Vigenère, Morse Code, and Bacon's binary steganography cipher.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files — entirely in your browser.
JWT Inspector
Decode and analyze JSON Web Tokens locally and securely.
Data Transformers
Base64 Converter
Encode and decode text or images to Base64 format instantly.
Coordinate Converter
Convert coordinates between DD, DMS, and UTM — with Haversine great-circle distance calculation.
Epoch Converter
Convert Unix timestamps to human-readable dates and vice versa.
Number Base Converter
Convert numbers between decimal, hex, binary, and octal — plus Base 36, Base 12, Maya Base 20, Babylonian Base 60, and Roman Numerals.
String Case Transformer
Transform text between camelCase, PascalCase, snake_case, kebab-case, and more — instantly.
A Bit of Whimsy
Developer Utilities
Reference
DNS Record Reference
A searchable reference for every major DNS record type — with plain-English explanations, real-world usage examples, and example zone file syntax.
EPSG Code Reference
A searchable reference for the most common EPSG coordinate reference system codes — with proj4 strings, area of use, units, and descriptions for every entry.
Localization Reference
A searchable reference for locales, language codes, country codes, currency codes, timezones, date formats, and number formats — everything you need for i18n and l10n in one place.
MIME Type Reference
A searchable reference for every common MIME type — with file extensions, Content-Type header values, and usage notes for APIs, browsers, and servers.
Time Management
Structural Formatters
GeoJSON Inspector
Paste, validate, format, and preview GeoJSON on an interactive map. Supports all geometry types.
HTML Formatter
Format, beautify, and minify HTML code instantly entirely within your browser.
JSON Formatter & Validator
Prettify, minify, and validate JSON strings with smart fix capabilities.
YAML Formatter & Validator
Format, validate, and convert YAML and JSON strings with ease.