Base64 Encoding an Image for Firefox/IE Add-on

When creating an open search add-on for Firefox or Internet Explorer, the image needs to be Base64 encoded. This article provides methods to encode an image using Base64.

Using an Online Tool

• Visit a website that provides Base64 encoding, such as [Base64 Encode/Decode](https://www.base64encode.org/).
• Upload the favicon image or copy and paste its URL.
• The encoded Base64 data will be displayed. Copy the output.

Using PHP

If you are familiar with PHP, you can perform Base64 encoding using the following steps:

Examples of Icon Element Usage

In OpenSearch plugins, the icon element is used to specify the image. Here is an example:

Replace "imageData" with your Base64 encoded data.

Additional Resources

• [Mozilla's Guide to Creating OpenSearch Plugins](https://developer.mozilla.org/en-US/docs/Search/Creating_OpenSearch_plugins)