Purpose and limits
About This Tool
This product is designed for people who need a straightforward invoice PDF without creating an account or sending invoice contents to a hosted invoice service.
What it does
The public site explains common invoice scenarios. A separate editor calculates deterministic totals, keeps the current draft in browser storage, previews the document, and creates Letter or A4 PDF output on user request.
What it does not do
There are no accounts, cloud invoice histories, payment collection features, accounting integrations, delivery tracking, tax determinations, or guarantees that an invoice satisfies a contract or law.
Why the boundary matters
Public educational pages and the private editor use separate origins. Public calls to action pass only an approved preset name and interface language, never seller, client, Logo, line-item, or PDF data.