Free Developer & Security Tools
18+ tools, all running 100% in your browser. No data ever sent to servers. No sign-up required.
Generators
QR Code Generator
Create QR codes instantly. Custom size, colors, error correction. Download as PNG or SVG.
Password Generator
Cryptographically secure random passwords. Custom length, character types, bulk generate.
UUID Generator
Generate v4 UUIDs with Web Crypto API. Bulk generate up to 100. Multiple formats.
Lorem Ipsum Generator
Placeholder text for designs. Paragraphs, sentences, or words. HTML wrap option.
Text Tools
Word Counter
Real-time word, character, sentence, paragraph count. Reading time, keyword density, case tools.
Diff Checker
Compare two texts side-by-side. Line-level and character-level diff. Added/removed highlighting.
Regex Tester
Test regular expressions with live highlighting. Quick patterns, cheat sheet, find & replace.
Markdown Preview
Live split-pane Markdown editor. Syntax highlighting, toolbar, export HTML, download .md.
Encoders & Crypto
Base64 Encoder / Decoder
Encode text to Base64 or decode back. File to Base64 support. UTF-8 compatible.
URL Encoder / Decoder
Encode/decode URL components. encodeURIComponent support. Essential for API work.
Hash Generator
MD5, SHA-1, SHA-256, SHA-384, SHA-512. Text and file hashing. Web Crypto API.
Image to Base64
Convert images to Base64 data URIs. Drag-drop, multiple output formats, reverse converter.
Formatters & Dev Tools
JSON Formatter & Validator
Format, beautify, minify, and validate JSON. Syntax error detection with line numbers.
CSS Minifier / Beautifier
Minify or beautify CSS. Size comparison, savings percentage. Download output.
HTML Beautifier / Minifier
Format or minify HTML. Custom indent, live preview iframe. Preserves pre/script blocks.
Meta Tag Generator
Generate SEO meta tags, Open Graph, Twitter Cards. Live Google/Facebook/Twitter preview.
JWT Token Decoder
Decode and inspect JWT tokens. Color-coded header/payload/signature. Expiration check.
Color Picker & Converter
HEX, RGB, HSL, HSV, CMYK. Color harmonies, tints/shades, WCAG contrast checker.