TOOLBOX
A growing collection of privacy-first tools — formatters, generators, and utilities. Everything runs locally in your browser. Nothing leaves your device.
Browse by Audience
Reference
Color Theory Reference
An interactive, educational reference for core color harmony rules including mathematical breakdown and visual palette generation.
Computer Languages Reference
A journey through the history of programming languages, from Ada Lovelace's first algorithm to modern syntax — and how English became the universal tongue of code.
CSS Reference
A historical deep-dive into the evolution of CSS, from the early days of preprocessors to the modern Utility-First and Native CSS revolutions.
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.
HTML Entity Reference
A searchable reference for HTML entities — named entities, numeric codes, and hex values for symbols, punctuation, math, arrows, and special characters.
HTML Tag Reference
A historical journey through the evolution of HTML, from CERN's first 18 tags to the chaotic 90s, culminating in an interactive Semantic Structure Visualizer.
HTTP Status Code Reference
A searchable, filterable reference for every HTTP status code — with plain-English explanations and real-world usage notes.
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.
Typeface Reference
A historical and structural reference of typography, from Gutenberg's press to iconic British signs, featuring an interactive typography lab.
Web Futures (2026+)
A showcase of exciting, upcoming native browser specifications from the W3C and ECMA, tracking exactly what is on the horizon for web development.
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.
SVG Prettifier & Preview
Format, minify, and preview SVG code with structural clarity and real-time visual feedback.
YAML Formatter & Validator
Format, validate, and convert YAML and JSON strings with ease.
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.
URL Encoder & Decoder
Securely encode and decode URLs with smart handling of parameters.
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.
IP Checker
A private tool to check your public IP address and browser information directly from our infrastructure.
JWT Inspector
Decode and analyze JSON Web Tokens locally and securely.
Password Strength Analyzer
Calculate entropy, crack time, and identify security patterns in your passwords.
Synthetic Generators
Developer Utilities
Time Management
Visual Craft
Advanced Color Space Converter
Convert colors between HEX, RGB, HSL, and more with live previews.
Celestial Map Maker
Generate ornate, astrolabe-inspired SVG star charts based on historical dates and coordinates.
CSS Unit Converter
Convert between px, rem, em, vw, vh, %, pt, and ch — with configurable base font size and viewport, plus ready-to-use CSS output.
Glassmorphism Gradient Builder
Design multi-stop CSS gradients with real-time glassmorphism previews and liquid aesthetics.
Golden Calculators
Precision geometry and trigonometry tools based on the golden ratio and golden angle.
Image Converter
Convert images between PNG, JPEG, and WebP formats with quality and resize controls — entirely in your browser.
Image Palette Generator
Extract dominant color palettes from any image using K-Means clustering.
Parametric Monument Builder
A dynamic 3D monument builder with adjustable parameters like base size, height, tiers, and time of day.
Type Scale Generator
Generate a harmonious typographic scale from a base size and ratio — with live preview, CSS custom properties, and Tailwind config output.
Audio Craft
Binaural Beats Generator
Synthesize custom binaural beats for meditation, focus, and relaxation using pure browser audio.
Focus Noise Synthesizer
Generate continuous, looping White, Pink, and Brown noise to aid in concentration and deep work.
Sacred Frequencies
Generate and listen to pure Solfeggio frequencies and harmonious tones using the Web Audio API.
Diagramming
A Bit of Whimsy
Anagram Game
Challenge your brain with this fun anagram puzzle, guided by a helpful owl.
Black Cat's Yarn Chase
Take a break, entertain the void. Catch the falling yarn before it reaches the black cat.
Shiny Object Detector
A scientifically questionable diagnostic tool that measures the shininess of whatever new technology, framework, or side project you're currently distracted by.
The Raven's Counsel
Consult the ancient wisdom of the Slavic Vrana for cryptic proverbs and practical advice.
Tile Slide Puzzle
Slide the tiles to reveal a jaunty black cat against a beautiful starry night.