---
title: sitemaptorss
date: 2025-12-28
tags: post
---

In the waning hours of my Christmas break, I've launched a new project: [sitemaptorss](https://sitemaptorss.com).

It, like [caltorss](https://www.caltorss.com/) before it, is hopefully well-described by its name: it converts a sitemap to an RSS feed.

Unlike caltorss (and [rssrssrssrss](https://www.rssrssrssrss.com/) before it), sitemaptorss has to deal with _state_: specifically, most sites will either fudge or omit entirely the `<lastmod>` tag in the sitemap, so I'm using Turso as the simplest-possible way to track the last modified date of each item. (Like those tools, this is a thing to scratch my own itch: enough sites that should have RSS feeds do not have them, and I am tired of waiting for them to be updated.)

It is not coincidental that these things interop nicely; between this and Buttondown's RSS-to-email functionality I can send myself a little weekly digest of what more serious people call "competitive intelligence" and is in fact usually just Stripe and a few other services soft-launching new products.

(A not-particularly-keen eye will also note that all of these sites have the exact same design. This is _great_. Being able to copy and paste the aesthetic and just focus on the ~100 lines of functionality is a great way to actually ship and finish things rather than dithering.)