# Blog to Newsletter Documentation

This tool generates formatted HTML newsletter content from blog entries, links, quotes, and other content sourced from a Datasette backup of simonwillison.net. Users can customize the newsletter by filtering content from the past 1-60 days, optionally excluding items already featured in previous newsletters, and reordering blog entries through an intuitive drag-and-drop interface. The generated HTML can be copied directly into Substack, with additional features including sponsor message customization, URL length warnings for email compatibility, and integration with previous newsletter archives to prevent duplicate content.

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