Developer Tools
Format JSON, encode Base64, generate UUIDs, test regex, build CSS gradients, and more — all free, all running locally in your browser.
Text & Data Formatters
JSON Formatter
Format, validate, and minify JSON with syntax highlighting. Free browser-based tool.
JSON to CSV
Convert JSON arrays to CSV format with headers. Free, instant, browser-based.
CSV to JSON
Convert CSV data to JSON array format. Free, browser-based converter.
SQL Formatter
Format and beautify SQL queries with syntax highlighting. Supports multiple SQL dialects.
Markdown to HTML
Convert Markdown to HTML with live side-by-side preview. Free, browser-based.
HTML to Markdown
Convert HTML to clean Markdown. Free, browser-based converter.
XML Formatter
Format and validate XML with proper indentation. Free, browser-based tool.
Encoders & Decoders
Base64 Encode/Decode
Encode and decode Base64 strings and files. Free, instant, browser-based.
URL Encode/Decode
Encode and decode URLs and query parameters. Free, instant, browser-based.
JWT Decoder
Decode JWT tokens to inspect header, payload, and expiration. Free, browser-based.
HTML Entity Encode/Decode
Encode and decode HTML entities. Convert special characters to HTML-safe text.
Generators
UUID Generator
Generate v4 (random) and v7 (time-based) UUIDs. Bulk generate up to 100. Free, browser-based.
Password Generator
Generate strong, random passwords with customizable length and character types. Uses Web Crypto API.
Hash Generator
Generate SHA-1, SHA-256, SHA-512, and MD5 hashes from text or files. Free, browser-based.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text — paragraphs, sentences, or words. Free, instant.
QR Code Generator
Generate QR codes from text or URLs. Customize colors and download as PNG or SVG.
CSS Tools
Color Picker & Converter
Pick colors and convert between HEX, RGB, and HSL formats. Free, browser-based.
CSS Gradient Generator
Build beautiful CSS gradients visually — linear, radial, and conic. Copy the CSS code.
Box Shadow Generator
Build CSS box shadows visually with multiple layers. Copy the CSS code. Free, browser-based.
Utilities
Regex Tester
Test regular expressions with real-time highlighting of matches and capture groups.
Cron Expression Generator
Build cron expressions visually with human-readable descriptions and next run times.
Timestamp Converter
Convert between Unix timestamps, ISO 8601, and human-readable dates. Free, browser-based.
Text Diff
Compare two texts and see differences highlighted inline or side-by-side. Free, browser-based.
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
Word Counter
Count characters, words, sentences, paragraphs, and estimate reading time. Free, instant.