Developer Tools

Free developer utilities that run entirely in your browser. Format and decode data, generate values, and test patterns without sending anything to a server.

QR Code Generator

Turn any text or URL into a scannable QR code. Download as PNG.

JSON Formatter

Pretty-print and validate JSON. Spot errors instantly.

Password Generator

Generate strong passwords with custom length and character sets.

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text. UTF-8 safe.

URL Encoder & Decoder

Percent-encode or decode URLs and query string values instantly.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.

UUID Generator

Generate random version 4 UUIDs in bulk. Copy with one click.

Unix Timestamp Converter

Convert Unix epoch seconds or milliseconds to dates, and back.

JWT Decoder

Decode a JWT header and payload in your browser. No signature check.

Regex Tester

Test a JavaScript regex against text with live matches and groups.