Free Developer Tools
JSON, Base64, regex and other developer utilities.
Developer Utilities & Code Tools
Every developer has a toolbox of utilities they reach for daily — JSON formatters, Base64 encoders, regex testers, colour pickers, and more. Our developer tools bring all of these into a single clean interface that runs entirely in your browser with no sign-up, no ads, and no tracking.
The collection covers data formatting (JSON, XML, SQL, CSV), encoding and decoding (Base64, URL, HTML entities), code generation (UUID, .htaccess, cron expressions), and visual tools (colour converters, diff checkers, markdown preview). Each tool is focused on one task and designed to handle edge cases gracefully.
Whether you are debugging an API response, generating test data, or converting between formats, these tools save you from context-switching into heavier applications.
Frequently Asked Questions
Do the tools work with large JSON or XML files?
Yes. The formatters and validators handle files up to several megabytes. For extremely large datasets, performance depends on your browser and device memory.
Is the regex tester compatible with JavaScript regex syntax?
Yes, it uses JavaScript's native RegExp engine, so the behaviour matches exactly what you would get in Node.js or browser-based JavaScript code.
Can I use the generated UUIDs in production?
Absolutely. The UUID generator produces RFC 4122 compliant version 4 UUIDs using your browser's cryptographic random number generator, making them suitable for production use.
Do you support syntax highlighting?
The JSON, XML, and code formatting tools include syntax highlighting for easier reading. The output can be copied as formatted text or plain code.