Developer Tools
Useful developer utilities for working with JSON, JWTs, timestamps, structured data, APIs, and other common development and debugging tasks.
Developer Tools
16 tools
JSON Formatter
Format, validate, and inspect JSON data with syntax highlighting, detailed validation errors, and an easy-to-read structured output.
JWT Decoder
Decode and inspect JSON Web Tokens to view headers, claims, expiration timestamps, and other token payload information directly in your browser.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to readable text directly in your browser.
Color Picker & Converter
Convert colors between HEX, RGB, and HSL formats with live color preview.
Diff Checker
Compare two text or configuration files and quickly identify added, removed, and unchanged lines.
Env Validator & Linter
Validate .env files, detect duplicate variables, check variable names and identify common environment configuration issues.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text directly in your browser.
Markdown Editor / Preview
Write Markdown and preview formatted output instantly. Copy or download your Markdown document.
Password Generator
Generate strong random passwords with customizable length, character sets, and security options.
SQL Formatter
Format and beautify SQL queries online with support for MySQL, PostgreSQL, SQL Server, SQLite, and other SQL dialects.
URL Encoder / Decoder
Encode and decode URLs and URL components for safe use in web addresses, query parameters, and APIs.
UUID Generator
Generate random UUID version 4 identifiers directly in your browser.
JSON ↔ CSV Converter
Convert JSON objects and arrays to CSV or transform CSV data into formatted JSON with support for quoted fields and special characters.
JSON ↔ YAML Converter
Convert JSON to YAML or YAML to JSON with validation and formatted output directly in your browser.
Regex Tester
Test JavaScript regular expressions against text, inspect matches, and experiment with regex flags directly in your browser.
Timestamp Converter
Convert Unix timestamps between epoch values and human-readable dates and times for debugging, logging, APIs, and distributed systems.