Fast without trying

It gets there by leaving things out, and by keeping what it can.

100 on a computer, 99 on a phone

PageSpeed Insights for the demo on a computer: 100 for performance, accessibility, best practices and SEO, with 0 ms of blocking time.
PageSpeed Insights, demo.boxletcms.org, 12 October 2026.
PageSpeed Insights for the demo on a phone: 99 for performance and 100 for accessibility, best practices and SEO, with 0 ms of blocking time.
  • Next to no JavaScript, 0 ms blocking.
  • One stylesheet for the site, plus the one your design compiles to.
  • A page cache that empties the moment you change anything.
  • Versioned addresses, so browsers keep files for a year.
  • Fonts from your own server.
A page's settings in the builder: its address, its parent page, its title and description for search engines, and a preview of the search result.

SEO that's just there

A title, description and sharing image per page, a canonical link, hreflang and breadcrumbs. sitemap.xml and robots.txt keep themselves up to date.

The Redirects screen: old addresses, where each now leads, and how often each was used.

Addresses that keep working

Rename a page and the old address redirects with a 301. Add your own redirects from an old site, each with a count.

llms.txt for AI tools

A plain list of your published pages and their descriptions, in every language. One switch turns it off.

Next: Multilingual from day one

Adding a language takes one screen.

Languages