Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text. Supports the Base64url variant used in JWTs and URLs.

What is Base64?

Base64 encodes arbitrary data as plain ASCII text — useful when a channel can only handle text (emails, JSON, URLs, JWTs). Everything runs in your browser; nothing is sent anywhere.

Text to encode

Use Base64url variant (-_ instead of +/, no padding)

Base64 to decode

Input is Base64url (-_ instead of +/, no padding)