Developer Tools
Tools for developers and programmers
Base64 Encoder & Decoder
Free online Base64 encoder and decoder. Encode text to Base64 or decode Base64 to text instantly. 100% browser-based, no data upload. Supports Unicode.
JSON Formatter & Validator
Free online JSON formatter, validator, and beautifier. Format JSON with syntax highlighting, precise error location, and tree view. 100% browser-based, no data upload.
URL Encoder & Decoder
Free online URL encoder and decoder. Encode URLs with encodeURI or encodeURIComponent. Supports special characters, Chinese, and Unicode. 100% browser-based, no data upload.
Frequently Asked Questions about Developer Tools
Are these developer tools free to use?
Yes! All developer tools on FreeToolCenter are completely free with no hidden costs or usage limits.
Do I need to register to use developer tools?
No registration required. Simply open any tool and start using it immediately.
Is my data safe when using these tools?
Yes! All processing happens locally in your browser. Your data never leaves your device.