7 min read
2026-02-17
Base64 is a method of encoding binary data into a text format using 64 characters: A-Z, a-z, 0-9, + and /. The = symbol is used for alignment.
Many protocols and formats only support text data. Base64 allows you to transfer binary data (images, files) through text channels.
Paste text or data into the input field
Select mode: encoding or decoding
Click the processing button
Copy the result
| Original text | Base64 result |
|---|---|
| Hello | 0J/RgNC40LLQtdGC |
| Hello | SGVsbG8= |
| 123 | MTIz |
Encoded data is approximately 33% larger than the original
Base64 is an encoding, not an encryption
Does not ensure data security
Widely used in email (MIME), Data URI and JWT
See also: URL encoding, HTML encoding, Binary text