Super simple PDF invoicing. InvoicePrinter is a server, command line program and pure Ruby library to generate PDF invoices in no time. You can use Ruby or JSON as the invoice representation to build the final PDF.

• Simple, no styling required, no calculation, no money formatting (bring your own)
• Pure Ruby, no dependency on system libraries or browsers
• Fast, so you can render invoices on the fly during requests

Simple invoice

See more usecases in the examples/ directory.

• A4 and US letter paper size
• Invoice/document name and number
• Purchaser and provider boxes with addresses and identificaton numbers
• Payment method box showing banking details including SWIFT and IBAN fields
• Issue/due dates box
• Configurable items' table with item description, breakdown, quantity, unit, price per unit, tax and item's total amount fields
• Description above the table
• Final subtotal/tax/total info box
• Page numbers
• Configurable field labels & sublabels (optional little labels)
• Configurable font file
• Logotype (as image scaled to fit 50px of height)
• Background (as image)
• Stamp & signature (as image)
• QR code (as image)
• Note
• JSON format
• CLI
• Server
• Well tested

• Installation
• Ruby library
• Server
• Command line

I am developing InvoicePrinter as a free and MIT-licensed library for several years now.

Please consider buying my book or my Rails starter kit so I can work more on Open Source.

Contributions are welcome. Make sure the tests are passing before submitting a PR:

$ bundle && bundle exec rake test

You can also quickly regenerate the examples if necessary:

$ ruby regenerate.rb

Copyright 2015-2025 © Josef Strzibny. Sponsored by LakyAI. MIT licensed.