What is Developer tools and what is it for?
Gathers the conversions frequently needed in day-to-day development on one page: JSON formatting and validation, Base64 encoding and decoding, reading JWT contents, HEX/RGB/HSL colour conversions. Everything runs in the browser; the data you enter is not sent to a server.
Frequently Asked Questions
- Pick the tool you want from the tabs.
- Paste the data.
- Copy the result.
No. Operations run in your browser; the data never leaves your device.
No. It only makes the contents readable. Signature verification requires the secret key and is not safe to do in the browser.
No. It is only an encoding and anyone can reverse it. Don't try to protect sensitive data with Base64.
The most common causes: a trailing comma after the last element, single quotes, and unescaped special characters. The validator shows the line of the error.