Developer Tools

JSON, regex, JWT, encoding, and more — all in your browser

📝 Text & Data

JSON FormatterFormat, minify, and validate JSON

Text DiffHighlight differences between two texts

Regex TesterTest regular expressions in real-time

Markdown PreviewLive Markdown rendering

🔐 Encoding & Security

Base64 / URL EncoderEncode and decode Base64 and URLs

JWT DecoderDecode and inspect JWT tokens

Password GeneratorGenerate strong random passwords

UUID GeneratorBulk generate v4 UUIDs

🔢 Conversion

Number Base ConverterBinary, octal, decimal, hex, IP, color codes

Color Code ConverterHEX, RGB, HSL, OKLCH conversion

QR Code GeneratorGenerate QR codes from URLs or text

Frequently Asked Questions

Q.Is my data sent to a server?

A. No. All tools run entirely in your browser. No data you enter is ever transmitted externally.

Q.Can you verify JWT signatures?

A. The JWT decoder decodes the payload for inspection purposes only. It does not verify signatures. Use it to inspect token contents — for signature verification, use a dedicated library in your application.