💻 Developer Tools

Free Developer Tools

Format JSON, encode URLs or Base64, inspect timestamps and JWT payloads, test regexes, and generate identifiers. These tools help inspect data but do not replace application-level validation.

Online Tools

Use in your browser

🧩JSON FormatterFormat, beautify, and validate JSON

🔡Base64 Encoder & DecoderEncode and decode Base64 text

🔗URL Encoder & DecoderEncode and decode URL text safely

⏱️Timestamp ConverterConvert Unix timestamps and readable dates

🔎Regex TesterTest regular expressions against sample text

🎫JWT DecoderDecode JWT headers and payloads locally

🎨Color ConverterConvert HEX, RGB, and HSL color values

🆔UUID GeneratorGenerate standard UUID v4 values

🧪HTML CSS JS Playgroundwrite web code and preview it instantly

FAQ

Q.Does decoding a JWT verify its signature?⌄

No. A readable header and payload do not prove that the token is authentic or safe to trust.

Q.Can I put real secrets in a shared example?⌄

Avoid it. Even if a tool processes input locally, copied output and shared links can disclose the secret.