Mini tools built for everyday tasks
JSON Validator
Validate JSON with error highlighting, explore with a collapsible tree view, and inspect stats, types and paths.
Password Generator
Generate strong, cryptographically random passwords with custom length, character sets and a bulk generator.
Base64 Tool
Encode and decode Base64 strings and file content. Supports text input, file upload and drag-and-drop.
Colour Converter
Convert between HEX, RGB, HSL and CMYK with live sliders, harmony palettes and contrast checking.
Timestamp Converter
Convert between Unix timestamps, ISO 8601 and human-readable date formats across any timezone, with a live clock.
Text Diff
Compare two blocks of text side by side with line-by-line and word-level highlighting of additions and deletions.
Encryption Tool
Encrypt and decrypt messages using ROT13, ROT47, Caesar, Atbash, Vigenère, XOR and AES-256-GCM ciphers.
Ltd Company Calculator
Model take-home pay for two directors — salary, dividends, corporation tax, employer NI, self-assessment and expenses.
UK Salary Calculator
Calculate take-home pay after income tax, National Insurance, student loan and pension deductions.
Roman Numerals
Convert between Arabic and Roman numerals, generate ranges and browse the standard numeral reference table.
QR Code Generator
Generate QR codes from URLs, text or contact cards. Customise size, colour and download as PNG or SVG.
Markdown Preview
Write Markdown and see a live rendered preview side by side. Copy as HTML or export the rendered output.
Countdown Timer
Set countdowns to any date and time, run multiple timers at once, and use quick presets for common events.