Developer Tools That Just Work

Format, validate, and minify JSON with syntax highlighting

Encode and decode text or files to/from Base64 format

Encode and decode URLs and URL components

Decode JSON Web Tokens and view header/payload

Compare two texts and highlight differences

Test regular expressions with real-time matching

Live markdown editor with split-screen preview

Count characters, words, lines, and bytes in text

Count words, sentences, paragraphs, and calculate reading time

Parse and analyze URL components including protocol, host, path, and query parameters

Encode and decode HTML entities and special characters

Escape and unescape backslash sequences for JSON, JavaScript, and regex

Live HTML preview with CSS and JavaScript support

Convert text between camelCase, PascalCase, snake_case, and more

Format and beautify SQL queries with multiple dialect support

Build and optimize prompts with templates and best practices

Count tokens for OpenAI, Anthropic, and other AI models

Calculate costs for AI API usage across providers

Compare AI models side-by-side with specs and pricing

Visual builder for OpenAI/Anthropic function schemas

Convert images to Base64 for AI vision models

Convert between HEX, RGB, HSL, and other color formats

Convert between Unix timestamps and human-readable dates

Convert numbers between binary, decimal, hex, and other bases

Convert CSV data to JSON format with custom mapping

Convert JSON to CSV with column filtering and nested object flattening

Convert JSON to Excel XLSX with multiple sheets and formatting

Convert JSON to interactive HTML tables with sorting and filtering

Convert between YAML and JSON formats

Encode JSON data to Base64 with minification and formatting options

Generate TypeScript interfaces from JSON with type inference and nested object support

Convert CSS units, storage sizes, and time units

Generate UUID v4 identifiers in bulk

Generate secure passwords with customizable options

Generate MD5, SHA1, SHA256 hashes for text and files

Generate QR codes with custom colors and logos

Generate placeholder text in multiple languages

Generate realistic fake data for testing and development

Create beautiful CSS gradients with visual controls

Generate CSS box shadows with visual preview

Create custom border radius with individual corner control

Interactive Flexbox layout designer and code generator

Generate Open Graph and Twitter Card meta tags

Optimize and minify SVG files for better performance

Complete reference of HTTP status codes with descriptions

Complete ASCII character table with codes and descriptions

Parse and build cron expressions with visual interface

Convert text to ASCII art with multiple font styles

Calculator with programmer mode and bit operations