Base64 Decoder
Decode Base64 encoded text back to its original format. Useful for working with encoded data in APIs, emails, and web applications.
Base64 Input
0 bytes
Decoded Output
Decoding ratio: 0.00x0 bytes
About Base64 Decoding
Base64 decoding converts Base64 encoded text back to its original binary or text format. This is the reverse process of Base64 encoding.
When decoding Base64:
- The input must contain only valid Base64 characters (A-Z, a-z, 0-9, +, /, and sometimes = for padding)
- The length of the input should be divisible by 4 (with padding)
- The output may contain binary data that isn't displayable as text
Common scenarios for Base64 decoding include:
- Processing data from APIs that return Base64 encoded content
- Extracting embedded images from HTML or CSS
- Decoding email attachments
- Working with JWT (JSON Web Tokens)