Free Open-Source Invoice Generator - Easy to Use & Customize
Fully open-source, customizable code, self-hostable. No vendor lock-in. Start generating now.
Generate PDFs instantly, Fully open-source code, Self-host or use online, No vendor lock-in
Why open-source matters
Most invoicing tools lock you into their ecosystem.
This one does not:
- Fully open-source
- No vendor lock-in
- Transparent codebase
- You control everything.
What you can do
- Generate invoices instantly
- Customize templates and fields before export
- Fork and modify the code for your workflow
- Self-host if you need full control
Built for developers
Unlike traditional tools like Stripe or QuickBooks, this is designed with developers in mind:
- Simple architecture you can read quickly
- Easy to extend with familiar web tooling
- Works with structured invoice data
- No bloated UI - just the invoice editor and PDF
Self-hosting option
Want full control?
You can run your own version:
- Host on your own server
- Customize branding
- Keep all data private
Use cases
- Indie hackers
- SaaS builders
- Agencies
- Privacy-focused users
FAQ
Is it really open-source?
Yes. The source is public on GitHub. You can inspect, fork, and adapt it for compliant open-source use.
Can I use it commercially?
Yes, if you comply with AGPL 3.0 license.
How do I create a free invoice?
Open the hosted app, fill in your invoice fields, preview the PDF live, then download. No signup step is required.
Can I create invoices without downloading software?
Yes. It is a web app that runs in the browser. You do not need a desktop installer.
Can I customize the invoice template?
Yes. Adjust fields, tax labels, currency, notes, and template options in the UI before generating the PDF.