I built something similar for myself, but with a live PDF preview, support for downloading PDFs in multiple languages (English and Polish), VAT tax deductions, and multiple currencies.

https://easyinvoicepdf.com/

Also it’s open-source https://github.com/VladSez/easy-invoice-pdf

Would love to receive any feedback as well :)

Nice work, this looks better than the established players in this space! You've got some customisation options in yours that I'd love to implement in mine as soon as time permits. Huge props for not forcing people to sign up for an account to use it!