Free Online Tools for Developers and Everyone
Fast, privacy-friendly utilities that run entirely in your browser. No signup, no uploads, no waiting.
Developer Tools
JSON Formatter
Free online JSON formatter and validator. Beautify, minify and validate JSON with clear error messages. No signup, works in your browser.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text online. Full UTF-8 support for any language. Free, fast, and runs entirely in your browser.
URL Encoder / Decoder
Encode or decode URLs and query strings online. Handles percent-encoding and reserved characters correctly. Free and private – runs in your browser.
Markdown Previewer
Write Markdown on the left and see the rendered HTML live on the right. Supports headings, lists, tables, code blocks and more. Free online tool.
Text Diff Checker
Compare two blocks of text line by line and see additions and removals highlighted instantly. Free online diff tool, no upload required.
Converters
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and dates back to epoch time. Live current timestamp, supports seconds and milliseconds.
Color Converter
Convert colors between HEX, RGB and HSL formats instantly. Includes a color picker and live preview swatch. Free online color conversion tool.
Generators
UUID Generator
Generate random UUID v4 identifiers online. Create 1 to 50 UUIDs at once with one-click copy. Free, instant, and generated locally in your browser.
Password Generator
Generate strong random passwords with custom length and character sets. Live strength indicator. 100% client-side – passwords never leave your browser.
QR Code Generator
Create QR codes for URLs, text, Wi-Fi and more. Adjust size and download as PNG. Free QR code generator that works entirely in your browser.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words. Adjustable length with one-click copy. Free dummy text generator.