Steve’s Encode64 Utility

This is my encode64 tool for Microsoft Windows. It’s used for creating data URIs which I talked about in the Ultimate web site optimization trick: data URIs article.

Steve's Encode64 Utility Screen Shot

Click here to download


  • Click the Select File button, open the file you want to convert. The tool will show the encoded string.
  • Then click the Copy to Clipboard button. Paste the string wherever you need it.


  • This tool is for almost any version of Microsoft Windows (sorry Mac and Linux users).
  • There is no file size check so be careful. If you try to process a big file it will hang your computer for some time, or lock up entirely. Files less than 32KB (IE8 limit) will be basically instantaneous.

Source code

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