Fitting diagrams under two megabytes
Two megabyte caps are common on court, permit and council submission systems that still want legible diagrams, plans and photographs. Documents in that class are heavy by nature: every embedded image adds its own weight, and the total drifts past the limit during ordinary editing.
MillFile spends the budget where it matters. Each page competes for space in the 2 MB total, so dense, image-heavy pages are reduced while light pages keep their full detail - and a lossless rebuild runs first, which is enough for plenty of documents. The whole pipeline runs on your device, so plans and filings never touch a server.