A simple invoice maker for one-off work.

Mono Invoice. is built for occasional invoicing — the moment when you've finished a job and just need to bill for it. Open the page, enter the details, watch the preview update instantly, and export a PDF.

Simple shouldn't mean rough

Plenty of quick invoice tools produce documents that look like quick invoice tools. Mono Invoice. keeps the speed but takes design seriously: sharp typography, clean spacing, and three templates that hold up in front of real clients.

No product to learn

There's no onboarding, no dashboard, and no persistent account. Your last invoice is auto-saved in your browser so repeat billing is even faster, and the "New" button carries your business details over to the next invoice automatically.

And it stays free

Creating and downloading invoices costs nothing, with no watermark ransom at the end. That's the whole product.