What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that converts binary data into a sequence of ASCII characters. It's widely used in web development, email systems, and data transfer protocols where binary data needs to be safely transmitted over text-based channels.
The encoding process takes every 3 bytes of input and converts them into 4 ASCII characters from a set of 64 characters (A-Z, a-z, 0-9, +, /). This makes Base64 encoded text about 33% larger than the original binary data.
How to Use Base64 Encoder?
- Enter your text in the input panel on the left, or switch to File mode to upload a file.
- The text is encoded automatically as you type — no button click needed.
- Copy the Base64 output to your clipboard or Save it as a text file.
- Click Sample to load example text for testing.
Common Use Cases
MIME encoding uses Base64 to embed binary attachments in email messages.
Embed images directly in HTML or CSS using Base64 data URIs.
Many authentication systems use Base64 to encode credentials and tokens.
Safely transmit binary data through text-only channels like JSON or XML.