Developer Tools That Just Work
Fast, free, private. Every tool runs entirely in your browser — no data is ever sent to a server.
JSON Formatter & Validator
Format with indentation, minify to a single line, or validate your JSON. Shows exact error positions.
Base64 Encode / Decode
Convert text to Base64 and back. Full UTF-8 support for international characters.
JWT Decoder
Decode JSON Web Tokens to inspect header, payload, and expiration status.
Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes using the native Web Crypto API.
URL Encode / Decode
Encode special characters for URLs or decode percent-encoded strings.
Unix Timestamp Converter
Convert between Unix epoch timestamps and human-readable dates. Auto-detects seconds vs milliseconds.
UUID Generator
Generate cryptographically random UUID v4 identifiers. Bulk generate up to 50 at once.
Text Diff Checker
Compare two texts and see additions, deletions, and unchanged lines with color highlighting.
Color Converter
Convert between HEX, RGB, and HSL with a live color preview.
Regex Tester
Test regular expressions with match highlighting and capture group display.
Cron Expression Parser
Parse and generate cron expressions with human-readable descriptions and next execution times.
YAML ↔ JSON Converter
Convert between YAML and JSON instantly. Handles nested objects, arrays, and common YAML features.
Markdown Preview
Live markdown editor with instant preview. Supports headings, lists, code blocks, tables, and more.
Password Generator
Generate cryptographically secure random passwords with customizable length and character sets.
SQL Formatter
Format and beautify SQL queries with proper indentation, keyword uppercasing, and minification.
Word Counter & Character Counter
Count words, characters, sentences, and paragraphs. Includes reading time, keyword density, and readability score.
CSS Gradient Generator
Create beautiful linear and radial CSS gradients with a visual editor. Adjust colors, stops, and angles.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words. Classic Latin dummy text for layouts.
Chmod Calculator
Interactive Unix file permission calculator. Convert between octal, symbolic, and human-readable formats.
HTML Entity Encoder / Decoder
Encode special characters to HTML entities and decode them back. Supports named, numeric, and hex formats.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more.
JSON to CSV Converter
Convert JSON arrays to CSV and back. Handles nested objects, missing fields, and proper CSV escaping.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal instantly. Supports custom bases 2-36.
Meta Tag Generator
Generate Open Graph, Twitter Card, and SEO meta tags with live previews of Google, Twitter, and Facebook cards.
CSS Box Shadow Generator
Create and preview CSS box shadows with multiple layers, inset shadows, and presets. Live CSS output with one-click copy.