🔐 Base64 Encoder/Decoder
Convert text to and from Base64 encoding
Input Bytes
13
Output Bytes
20
Size Change
+53.8%
Characters
20
💡 Quick Examples
📚 About Base64
What is Base64? Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 characters (A-Z, a-z, 0-9, +, /).
Why use it? Base64 is commonly used to encode binary data for transmission over text-based protocols like email (MIME), embedding images in HTML/CSS (data URIs), and storing binary data in JSON.
URL-safe variant: Uses - and _ instead of + and /, and omits padding (=). Useful for passing data in URLs without encoding.
Size overhead: Base64 encoding increases data size by approximately 33% (every 3 bytes become 4 characters).