Send a clear quote with a validity date, then turn it into an invoice with one click when the client says yes.
Quotes use their own numbering series (for example Q2026-001), have a “valid until” date, and can be marked accepted or declined. When a quote is accepted, choose More → Convert to invoice and every line, discount and client detail is carried over to a new invoice draft.
An estimate is an approximate price; a quote is a fixed offer. The document works for both — rename the title in your language settings if your market expects “Estimate” or “Offer”.
There is no account and no server behind this invoice generator. Your business details, clients, products and invoices are stored in your browser's own database (IndexedDB) and never uploaded. The PDF is built on your device. That also means nobody else has a copy — download a backup from Settings → Backup now and then, and keep it with your accounting files.
It is good practice to show prices the same way the invoice will, including tax, so the client knows the final amount.
The quote is kept as it was and marked as invoiced. The invoice is a new draft you can still edit before issuing.