Most small businesses pay $30 to $90 a month for invoicing software and still end up in Canva fixing the layout. FOLIO is the alternative: a tiny engine I wrote from scratch in pure Python that writes the PDF format itself. Your colours, your wording, your line items, your pay link. Out comes a clean multi-page PDF in under a second.

What you get: a private web form (or a JSON endpoint your other tools can call) that produces proposals, quotes and invoices. Cover band in your brand colours, an itemised table that paginates properly, exact tax / discount / deposit maths, a "where the money goes" chart, and a clickable Pay button. Runs on a $5 server or your laptop. No Node, no Chrome, no licences. 5 KB PDFs. Full source, tests and a plain-English README. You own it.

How it works: send me your logo colours and one recent proposal. I send back your first FOLIO PDF before we talk price. If you like it, setup is 3 business days, $750 flat, two rounds of layout changes included. Extra templates $150 each. Try the live demo first: https://web-production-4df4.up.railway.app/