1. Paste text in the source area and click "Encode Base64" button encode text to Base64.
notepad++ convert image file to base64
The output Base64 will be listed in the target area.
2. Paste Base64 in the source area and click "Decode Base64" button decode Base64 to text.
The output text will be listed in the target area.
Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. The term Base64 originates from a specific MIME content transfer encoding.
The particular set of 64 characters chosen to represent the 64 place-values for the base varies between implementations.
The general strategy is to choose 64 characters that are both members of a subset common to most encodings, and also printable. This combination leaves the data unlikely to be modified in transit through information systems, such as email, that were traditionally not 8-bit clean.
For example, MIME's Base64 implementation uses A–Z, a–z, and 0–9 for the first 62 values. Other variations share this property but differ in the symbols chosen for the last two values; an example is UTF-7.
The Base64 index table: