Utility Tools
Free online utility tools
Twelve small tools you reach for every week: count words and reading time, convert capitalisation, diff two drafts, format and validate JSON, encode and decode Base64, render Markdown to HTML, convert colours, generate placeholder text, decode Unix timestamps, convert units, and generate QR codes and strong passwords. All computed locally in your browser.
QR Code Generator
Generate scannable QR codes for URLs, Wi-Fi, vCards, emails and phone numbers — live preview, custom colors, and PNG/SVG download in your browser.
Password Generator
Create strong, random passwords instantly with cryptographically secure entropy — custom length, character sets, and a live strength meter, right in your browser.
Unit Converter
Convert length, weight, temperature, area, volume and file sizes instantly — cm to inches, kg to pounds, GB to MB and more, live as you type.
Word Counter
Paste or type text and get instant live counts — words, characters with and without spaces, sentences, paragraphs, and estimated reading time.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case — one-click copy of the result.
Text Diff Checker
Paste two blocks of text and see a visual highlighted diff showing additions, deletions, and changes between them.
JSON Formatter & Validator
Paste JSON, pretty-print or minify it with proper indentation, and get clear validation messages if your JSON is malformed — entirely in your browser.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text — fast, accurate, and fully offline. Handles UTF-8 characters correctly.
Markdown to HTML Converter
Paste Markdown and see live-rendered HTML output with a one-click copy option — perfect for content that needs clean HTML.
Color Picker & Converter
Pick a color and convert between HEX, RGB, HSL, and CMYK instantly. One-click copy for each format — a standalone color tool for designers and developers.
Lorem Ipsum Generator
Generate placeholder text instantly — choose words, sentences, or paragraphs. One-click copy. Free, fast, and runs entirely in your browser.
Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly. Supports seconds and milliseconds, multiple timezones — essential for developers working with APIs, logs, and databases.
Generated on your device
None of these tools need a server: QR codes are encoded locally, passwords come from your browser's cryptographic random number generator, and unit conversion is plain math in JavaScript. That makes them fast, always available, and private by construction. Browse all tools or read about our security approach.
FAQ
Utility tools — common questions
What utility tools are free?
All of them — every utility tool is free, with no usage caps, no watermarks and no account required.
Is anything I type sent to a server?
No. QR codes are encoded locally, passwords come from your browser's cryptographic random number generator, and unit conversion is plain math in JavaScript. Nothing leaves your device.
Do the tools work on my phone?
Yes. Every tool is built mobile-first and works in modern browsers on Android and iOS as well as desktop.