Developer
Developer and web tools: Base64, hash, HTML entities, JSON formatter, URL encoder, UUID, QR codes and passwords.
Tools — Developer
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to plain text online and locally.
JSON Formatter
Format, validate, prettify, and minify your JSON data in real-time in your browser.
Password Generator
Generate secure, random passwords with custom length and character sets instantly in your browser.
QR Code Generator
Create custom, downloadable QR codes for URLs, text, Wi-Fi or email instantly.
UUID Generator
Generate single or bulk secure RFC4122 version 4 UUIDs instantly in your browser.
URL encoder / decoder
Encode or decode URLs and query strings (percent-encoding) instantly.
Hash generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of any text locally.
HTML entity encoder / decoder
Encode text to HTML entities or decode entities to plain text.
Slug generator
Turn any title into a clean URL slug: lowercase, no accents, hyphenated. Instantly in your browser.
Font size converter
Convert font sizes between px, em, rem and pt with a configurable base size. For CSS and design.
CSS minifier
Minify CSS by removing comments and whitespace to shrink the file size. Local and instant.
CSS gradient generator
Create linear CSS gradients from two colors and an angle, with a live preview and code to copy.
What is my screen resolution
Shows your screen resolution, viewport, pixel ratio and color depth for your device.
JWT decoder
Decode a JWT (JSON Web Token) to read its header and payload claims. 100% local — your token never leaves the browser.
CSV to JSON converter
Convert CSV to a JSON array of objects in your browser. The first row becomes the keys. Free and private.
Chmod calculator
Build Unix file permissions with checkboxes and get the chmod octal (e.g. 755) and symbolic (rwxr-xr-x) values.
Morse code translator
Translate text to Morse code and decode Morse back to text, automatically. Free, instant, in your browser.
Text diff
Compare two texts line by line and see what was added or removed. 100% local in your browser.
ASCII table
Full printable ASCII table with decimal, hexadecimal, octal and character values. Free reference.
JSON to CSV converter
Convert a JSON array of objects to CSV in your browser. Keys become the header row. Free and private.
CSS box-shadow generator
Generate CSS box-shadow with a live preview: offset, blur, spread, colour and inset. Copy the code. Free.
CSS border-radius generator
Generate CSS border-radius per corner with a live preview and copy the code. Free, instant, in your browser.
Color palette generator
Generate a palette of tints and shades from any base colour, with hex codes. Free, instant, in your browser.
Markdown to HTML
Convert Markdown to HTML source: headings, bold, italic, code, links and lists. 100% local in your browser.
URL parser
Parse a URL into protocol, host, path, query parameters and fragment. 100% local in your browser.
Color contrast checker
Check the contrast ratio between two colours and whether it passes WCAG AA and AAA. Free, in your browser.
CSS flexbox generator
Generate CSS flexbox layouts with a live preview: direction, justify, align and gap. Copy the code. Free.