Base64 Encoder & Decoder
Encode and decode Base64 and URL Encoding for developers.
0 characters
Quick examples
What is Base64?
Base64 is an encoding scheme that converts binary data into ASCII text using 64 printable characters (A–Z, a–z, 0–9, +, /). It is widely used to transmit binary data (such as images) over text-based protocols.
JWT token payloads are encoded with Base64URL
Images embedded in HTML/CSS use Base64
HTTP Basic Auth uses Base64 for user:password
Email attachments are transmitted in Base64 (MIME)
Is Base64 encryption?
No. Base64 is just an encoding, not encryption. Anyone can decode it easily. Use it for data transmission, not for security.
What is the difference between Base64 and URL Encoding?
URL Encoding (percent-encoding) converts special characters to %XX format, safe for use in URLs. Base64 converts binary data into readable text, useful for transmission.
Where is Base64 used?
In JWT tokens, Data URIs (images embedded in HTML/CSS), HTTP Basic Auth, and email attachments (MIME).