Base64 Encode and Decode Online

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. It is widely used in protocols that do not support raw binary data.

Common Uses of Base64

• encoding email attachments (MIME);
• embedding images in CSS / HTML (data:image/png;base64,...);
• JWT tokens use URL-safe Base64 for the header and payload;
• HTTP Basic Auth: Authorization: Basic base64(user:pass).

URL-safe Base64 replaces + with - and / with _, making the string safe for use in URLs without additional percent-encoding.