I was about to add a PDF library to our project. Then I remembered every browser already has one. Here's the situation. We make Sheaf , a time tracking and invoicing app. After a week with basically no visitors, we decided to build a few small free tools that people actually search for. The first one was an invoice generator: fill in a form, get a PDF, no account. My first plan was the usual one. Send the form to the server, render a PDF there, send the file back. Then I started listin...