Encoding & Crypto

Encode, decode, and hash text and tokens.

Base64 Encode / Decode

Encode text to Base64 or decode Base64 back to text.

URL Encode / Decode

Percent-encode or decode strings and full URLs.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of text.

JWT Decoder

Decode a JSON Web Token's header and payload without a server round-trip.

UUID Generator

Generate UUID v4 or time-ordered UUID v7 identifiers in bulk. Choose the output format, casing, hyphens, and braces, then copy or download the results — all in your browser.

HTML Entity Encoder / Decoder

Encode special characters to HTML entities, or decode them back.

Text ↔ Binary / Hex Converter

Convert text to binary or hexadecimal, and back to text.

ROT13 / Caesar Cipher

Encode or decode text with ROT13 or a custom Caesar cipher shift.

HMAC Generator

Generate an HMAC signature for a message using a secret key.

Basic Auth Header Generator

Generate an HTTP Basic Authentication header from a username and password.