BillPDF is a free online service to create invoices for your clients. You can enter as much or as little information as you want. You can start by entering Sender and Recepient information. Note that BillPDF will not ask you for any contact information, so you don’t need to worry about privacy of you or your client.
After that, you can start adding the items that you want to include in your invoice. You can add item description, item quantity, item price, and even tax on item. It is extremely simple to add any number of items that you want to.
Once you had added all the items, you can download the invoice as a PDF file, and send it to your customer. I really like simplicity of BillPDF. This is a good service to create occasional invoices on the go. I wish it had some option to create an account in which I could save all the invoices that I create online. But as I said, the best feature is its simplicity. So, next time you need a free service to create a simple invoice, try BillPDF.