I built a free and open-source invoice generator with a live PDF preview that runs in your browser.

It supports multiple currencies, VAT tax deductions, and lets you download PDFs in multiple languages (English and Polish for now, with more coming soon). You can also share your invoice by clicking “Generate a link to invoice” button.

Try it out: https://easyinvoicepdf.com/

Check it out on GitHub as well:

https://github.com/VladSez/easy-invoice-pdf

Would love to hear your feedback =)