Code & Developer Tools
Developer utilities - validate JSON, test regex, generate UUIDs, encode Base64, and more.
All Developer Tools (5)
Essential utilities for developers and engineers
JSON Formatter & Validator
Format, validate, and beautify JSON with syntax highlighting
Base64 Encoder/Decoder
Encode and decode Base64 strings and files
Regex Tester
Test and debug regular expressions with live matching
UUID & Hash Generator
Generate UUIDs, NanoIDs, and cryptographic hashes (MD5, SHA-256, SHA-512)
Merge HTML & CSS
Inline CSS into HTML for email templates
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About Developer Tools
Our developer tools help engineers validate, format, encode, and debug code faster. Whether you're working with JSON APIs, testing regular expressions, or generating UUIDs, these browser-based utilities eliminate the need for terminal commands or desktop apps.
All tools run client-side with no server processing, making them fast, private, and available offline. Perfect for quick debugging sessions or integrating into your daily development workflow.
Common Developer Tasks
- •Format and validate JSON responses from APIs with syntax highlighting
- •Test and debug regular expressions with live matching and capture groups
- •Encode and decode Base64 for API authentication and data transfer
- •Generate UUIDs, NanoIDs, and cryptographic hashes for unique identifiers
- •Inline CSS into HTML for email template development
Frequently Asked Questions
Does the JSON validator support large files?
Yes, the JSON formatter handles files up to several megabytes and provides instant validation with detailed error messages pointing to the exact line and character.
What regex flavors are supported?
Our regex tester uses JavaScript regex syntax, which is compatible with most programming languages. It shows all matches, capture groups, and supports flags like global (g), case-insensitive (i), and multiline (m).
What hash algorithms are available?
We support MD5, SHA-1, SHA-256, SHA-384, and SHA-512. You can hash text or files directly in your browser using the Web Crypto API.
Can I use these tools offline?
Yes, once loaded, all developer tools work completely offline since processing happens in your browser with no server dependencies.