Dev Tools
Free online developer tools and utilities for programmers. Format JSON, encode Base64, test regex, generate hashes, and more. Essential tools for web development, API testing, and software engineering.
Dev Tools
Cron Generator
Create cron expressions for task scheduling without memorizing complex syntax. Our interactive cron generator helps you build accurate cron expressions for Linux, Unix, and cloud platforms.
Meld / Diff Tool
Compare text files, code, or any text content with our powerful diff tool. Visualize changes with color-coded highlighting and line-by-line comparison similar to Git diff and Meld.
Date Time Converter
Convert dates and times between various formats including Unix timestamps, ISO 8601, and custom formats. Perfect for developers working with APIs and databases.
Formatters
JSON Formatter
Clean up messy JSON data with proper formatting and indentation. Validate JSON syntax, detect errors, and make your data readable and structured.
XML Formatter
Transform messy XML into well-formatted, readable documents. Validate XML syntax, proper nesting, and structure while maintaining data integrity.
HTML Formatter
Clean up your HTML code with proper indentation, formatting, and structure. Perfect for web developers who want readable, maintainable HTML.
SQL Formatter
Make your SQL queries readable and maintainable with proper formatting. Supports all major SQL dialects and complex query structures.
Validators
XML Validator
Ensure your XML documents are valid and well-formed. Check syntax, structure, and compliance with XSD schemas or DTD definitions.
JSON Validator
Verify your JSON data is correctly formatted and valid. Check syntax errors, validate against JSON schemas, and ensure data integrity.
XPath Tester
Test XPath expressions and see results instantly. Perfect for web scraping, XML data extraction, and automated testing scenarios.
Regex Tester
Build and test regular expressions with live preview. See matches highlighted in real-time and understand complex regex patterns with detailed explanations.
Cron Tester
Validate cron expressions and see when they will run next. Perfect for verifying scheduled tasks and understanding cron timing.
SQL Validator
Check your SQL queries for syntax errors and best practices. Supports multiple database systems and provides optimization suggestions.
Converters
XML to JSON
Transform XML data into JSON format while preserving the document structure and relationships. Perfect for API modernization and data format migration.
JSON to XML
Transform JSON data into properly formatted XML documents. Ideal for legacy system integration and XML-based API requirements.
JSON to Table
Transform complex JSON data into user-friendly tables with advanced filtering and sorting capabilities. Perfect for data analysis and visualization.
JSON to CSV
Transform JSON data into CSV format for spreadsheet applications and data analysis tools. Handles nested objects and arrays intelligently.
CSV to JSON
Transform CSV data into structured JSON format. Automatically detects data types and provides flexible output formatting options.
JSON to YAML
Transform JSON into clean, readable YAML format. Perfect for configuration files, documentation, and human-friendly data representation.
YAML to JSON
Transform YAML configuration files and documents into JSON format. Validates YAML syntax and provides detailed error reporting.
Cron to Time
Translate complex cron expressions into easy-to-understand schedules. See when your tasks will run next and understand cron timing patterns.
Unix Time Converter
Convert between Unix timestamps and human-readable dates in any timezone. Essential for developers working with APIs and databases.
Encoders & Cryptography
URL Encoder/Decoder
Safely encode URLs for web transmission and decode encoded URLs back to readable format. Essential for handling special characters in URLs and query parameters.
Base64 Encoder/Decoder
Convert text and binary data to Base64 format for safe transmission over text-based protocols. Widely used in APIs, email systems, and data storage.
Hash Generator
Create cryptographic hashes for data integrity verification, password storage, and digital fingerprinting using industry-standard algorithms.
JWT Decoder
Decode and analyze JWT tokens to inspect claims, expiration dates, and token structure. Essential for API authentication debugging and development.