Invoice Generator
Bill it, get paid
Line items, tax, a due date. Print straight to PDF when it looks right.
Nothing is uploaded. Customer names and amounts stay in this tab.
Document
Lines
Printing uses your browser's own PDF writer, so no extra software is loaded.
Preview
- No upload
- Runs offline
- Totals in whole cents
- Print to PDF
How the totals are worked out
Every amount is held in whole cents from the moment you type it. Line amount is quantity times unit price; the subtotal is the sum of the lines; the discount comes off the subtotal; tax applies to what is left. Rounding happens once, per line, rather than at the end.
That ordering matters: doing the arithmetic in floating point and rounding at the end is how a total ends up a penny away from the sum of its own rows, which is precisely the discrepancy a client notices.
Not an accounting system. It does not store anything, number your documents sequentially, or know your tax rules — the tax field is a plain percentage and applies to everything on the document. Check the rate against your jurisdiction before sending.
Questions people actually ask
Billing questions people actually ask before they send the first one.
How do I make an invoice for free?
Fill in your details and the customer's, add the lines, set a payment due date and press Print. No account, no email address, no watermark and no limit on how many you make.
What has to be on an invoice?
The word Invoice, a unique invoice number, the date issued, your business name and address, the customer's details, itemised goods or services with quantities and unit prices, the amount of any tax, and the total. Payment terms and how to pay belong there too, or you will be chased for them.
How is an invoice different from a quote or a purchase order?
A quote is the supplier offering a price. A purchase order is the buyer committing to buy. An invoice is the supplier saying it has been supplied and is now payable. Three documents, three directions — sending the wrong one is a common reason a payment sits unprocessed.
Does the tax calculate correctly?
Discount comes off the subtotal, then tax applies to what is left. Every amount is held in whole cents from the moment you type it, so the total always equals the sum of its own rows rather than being a penny out.
Can I save it as a PDF?
Yes — press Print and choose Save as PDF. Your browser already has a competent PDF writer, so this page does not load a second one. The editor is hidden when printing, so what comes out is the invoice alone.
Does it keep a record of my invoices?
No. Nothing is saved, sent or logged, and there is no numbering sequence between visits — the number is pre-filled and you overwrite it. Keep the PDFs, or use an accounting system if you need a register.
Part of nine free KaiOrb instruments — all in-browser, none of them upload your files.