API Tool Calls

Free invoice generator (PDF)

Fill in your details and line items, check live totals, then create and save an invoice PDF.

Free to use, with no sign up. Everything runs in your browser and nothing is uploaded.

People and invoice details

Line items

Adjustments and terms

Discount is subtracted before tax. Each line and the tax amount are rounded to cents, half up.

Subtotal: USD 0.00

Discount: USD 0.00

Tax: USD 0.00

Total due: USD 0.00

Made with pdf-lib by Andrew Dillon, MIT license. License text.

Frequently asked questions

Does my invoice leave my device?

No. Your invoice never leaves the device. PDF creation happens in your browser with nothing sent to API Tool Calls. Drafts are saved only in this browser’s localStorage when available; Clear draft removes the saved draft.

How are totals calculated?

Each quantity times unit price is rounded to integer cents, half up. The discount amount is subtracted from the subtotal before tax. Tax is rounded once to cents, half up. Negative values and a discount larger than the subtotal are rejected.

Can descriptions span pages and use any language?

Long descriptions wrap and many line items flow onto additional pages. The PDF uses Helvetica with WinAnsi characters: most Western European text works. Unsupported characters show a plain error naming the field so you can replace them.

What does Clear draft do?

Clear draft resets the form, removes its saved local draft and clears the PDF save link. PDFs you already saved on your device remain there. Choose US Letter or A4 before creating the PDF.

More tools

Images & PDFs

Text & codes

Fun & everyday

Money & jobs

All API Tool Calls tools