What Are Developer Tools?
Developer tools (dev tools) are essential utilities that streamline common programming tasks. Our collection includes over 50+ free online tools for formatting, minifying, encoding, decoding, converting, testing, and debugging code and data. All tools run entirely in your browser, ensuring your data remains private and secure. No server uploads, no tracking, no signup requirements—just powerful utilities to boost your productivity.
Formatters & Beautifiers
Format and beautify JSON, XML, HTML, CSS, JavaScript, and SQL code with proper indentation and syntax highlighting. Perfect for making minified or compressed code readable.
Minifiers & Uglifiers
Compress and optimize code for production by removing whitespace, comments, and unnecessary characters. Reduce file sizes for faster page loads.
Encoders & Decoders
Encode and decode Base64, URLs, and JWT tokens. Essential for working with APIs, authentication systems, email attachments, and data URIs.
Format Converters
Convert between popular data formats including JSON to YAML, YAML to Properties, CSV to JSON, and more. Ideal for configuration management.
Testing & Validation
Test regular expressions, parse CRON expressions, validate JSON/XML syntax, and debug strings. Catch errors early and validate patterns.
Text Utilities
Inspect strings, convert text cases, parse URLs, and analyze character encodings. Helpful for data cleaning and content processing.
>Why Use Our Tools?
API Development & Testing
Format JSON responses, encode/decode Base64 payloads, convert between data formats, and validate request/response structures when building or consuming REST APIs.
Code Optimization
Minify JavaScript, CSS, and HTML files before deploying to production to reduce bandwidth, improve page load times, and optimize website performance for better SEO.
Configuration Management
Convert between YAML and Properties files for Spring Boot applications, format JSON configuration files, and manage environment-specific settings across different deployment targets.
Debugging & Troubleshooting
Beautify minified code to understand third-party libraries, decode JWT tokens to inspect claims, test regex patterns, and analyze string encodings when fixing bugs.
Data Migration & Transformation
Convert CSV to JSON for API consumption, transform JSON to YAML for Kubernetes configs, parse and validate data formats during ETL processes.
Security & Authentication
Decode JWT tokens to inspect authentication payloads, encode sensitive data with Base64 for transmission, and validate token structures in authentication workflows.
Are these tools safe for sensitive data?›
Yes, all tools run entirely in your browser using JavaScript. No data is sent to any server or stored anywhere. Your code, configurations, and data remain completely private on your device. However, avoid using these tools on public or shared computers when working with highly sensitive information.
Can I use these tools offline?›
The tools require an initial internet connection to load the page and JavaScript libraries. Once loaded, most tools work offline since all processing happens in your browser. However, some features like external library loading may require an internet connection.
What file size limits do the tools have?›
File size limits depend on your browser's memory and processing capabilities. Most tools can handle files up to several megabytes without issues. For very large files (10MB+), performance may vary depending on your device specifications and browser.
How accurate are the converters and formatters?›
Our tools use industry-standard, well-tested libraries for parsing and conversion. They follow official specifications for formats like JSON, YAML, XML, and Base64. However, always validate the output in your specific use case, especially for production systems.