Free Developer Tools

Fast, privacy-first utilities for developers. Everything runs in your browser — nothing you enter is ever sent to a server.

Data

{ }

JSON Formatter

Format, validate, and beautify JSON instantly.

#ID

UUID Generator

Generate v4 UUIDs or ULIDs in bulk, one click to copy.

T:00

Timestamp Converter

Convert Unix timestamps to human-readable dates and back, in any timezone, instantly.

Encoding

B64

Base64 Encode/Decode

Encode text to Base64 or decode Base64 back to plain text, live as you type.

Security

JWT

JWT Decoder

Decode a JSON Web Token's header and payload instantly and inspect expiry.

Text

.*

Regex Tester

Test regular expressions against sample text with live match highlighting and capture group breakdown.

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