Free Online Developer Tools
Powerful, free, and fast online tools for developers and students
Format, validate, encode, and decode your code without signing up or storing data on our servers.
JSON Parser & Formatter
Format, minify, validate, and convert JSON to XML, YAML, or CSV. Includes tree view and sorting.
Learn More →Base64 Encode / Decode
Easily encode text to Base64 or decode Base64 strings. Support for file uploads.
Learn More →JSON to Dart Converter
Generate Dart model classes from JSON. Perfect for Flutter development with null safety support.
Learn More →JSON to POJO Converter
Generate Java POJO classes from JSON. Supports Lombok, Jackson, Gson, and Spring Boot development.
Learn More →URL Encode / Decode
Encode URLs for safe transmission or decode encoded URLs instantly. Perfect for web developers.
Learn More →PHP Serialize
Convert PHP arrays or objects into serialized strings for storage or transfer.
Learn More →PHP Unserialize
Convert PHP serialized strings back into readable arrays or objects.
Learn More →HTML Beautifier
Format, beautify, minify, and validate HTML code. Improve code readability instantly.
Learn More →XML Beautifier
Format, minify, and validate XML documents. Perfect for data interchange and configuration files.
Learn More →Regex Tester
Test and debug regular expressions with instant pattern matching and replacement. Support for all regex flags.
Learn More →JWT Decoder
Decode and validate JWT tokens instantly. View header, payload, and signature details securely in your browser.
Learn More →JWT Encoder
Create JWT tokens with custom header, payload, and secret key. Generate tokens for testing and development.
Learn More →UUID Generator
Generate random UUIDs (v1 and v4) for your applications. Create single or batch UUIDs with custom formatting.
Learn More →Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes. Create cryptographic hashes for text instantly.
Learn More →Why Choose Our Tools?
⚡ Fast & Reliable
Process your data instantly in your browser with no server delays or limitations.
🔒 Secure & Private
All processing happens locally in your browser. Your data is never sent to any server.
✨ No Sign-Up Required
Start using our tools immediately without creating an account or providing personal information.
Frequently Asked Questions
Are these tools completely free?
Yes, all our tools are completely free to use. No hidden charges or premium plans.
Is my data stored on your servers?
No, all processing happens locally in your browser. We don't store any of your data on our servers.
Can I use these tools offline?
Most tools work offline once the page is loaded. However, you need an internet connection for the initial page load.
What file formats are supported?
Most tools support .txt, .json, .html, .htm, and .xml files up to 5MB in size.