Base64 is an encoding scheme used to represent binary data in a readable ASCII string format. It is commonly used in web development for embedding data directly into URLs, CSS, or HTML. This tool provides a simple interface to both encode plain text into a Base64 string and decode a Base64 string back to its original text form. It's an essential utility for developers and anyone working with data transmission protocols where binary data needs to be safely handled as text.

To Encode:

1. Select the "Encode" tab.
2. Type or paste the text you want to encode into the left-hand textarea ("Text to Encode").
3. Click the arrow button in the middle, or the result will appear automatically.
4. The Base64-encoded string will appear in the right-hand textarea.
5. Click "Copy Result" to copy the encoded string to your clipboard.

To Decode:

1. Select the "Decode" tab.
2. Paste the Base64 string you want to decode into the left-hand textarea ("Base64 to Decode").
3. Click the arrow button in the middle.
4. The original, decoded text will appear in the right-hand textarea.
5. Click "Copy Result" to copy the decoded text.