Base64 Helper is a Chrome add-on developed by zh.sanget. As the name suggests, it serves as a simple helper to convert between string and base64. With this add-on, users can easily encode a string to base64 or decode a base64 string back to its original form.

The interface of Base64 Helper is straightforward and user-friendly. It provides a text input field where users can enter the string they want to convert. The add-on then offers two buttons - "Encode" and "Decode" - which perform the respective conversions. The resulting output is displayed in a separate text area, making it easy for users to copy the converted string.

This add-on is particularly useful for developers or anyone who frequently works with base64 encoding. It eliminates the need for manual conversion and simplifies the process. Base64 Helper is available for free on the Chrome Web Store, making it accessible to anyone who needs this functionality.