Professional Invoicing,
Zero Subscriptions
Owl Invoicing is a powerful, self-contained client portal that runs entirely in your browser. Create invoices, track payments, manage clients — all without servers, logins, or monthly fees. Your data stays on your device, always.
Replace Expensive SaaS Subscriptions
Stop paying $20-50/month for basic invoicing. Owl Invoicing gives you what you need — for free.
Everything You Need, Nothing You Don't
Built for freelancers, consultants, and small businesses who want simplicity without compromise.
All data stays in your browser using IndexedDB. Nothing is ever sent to any server. Export .owlinvoice files to backup or transfer.
Create clean, professional invoices with your branding. Apply late fees, add line items, and track payment status.
Download publication-ready PDFs of any invoice. Email them directly or print for clients who prefer paper.
Manage unlimited clients. Switch between them easily or view all invoices at once for a complete overview.
No internet required after the initial load. Perfect for working on planes, remote locations, or anywhere with spotty wifi.
Clean, intuitive design inspired by the best invoicing tools. No learning curve — get started in seconds.
Built in the Open, Built to Last
Owl Invoicing is completely open source. Inspect the code, contribute improvements, or fork it for your own needs. We believe essential business tools shouldn't be locked behind paywalls or proprietary systems.
- Audit the code yourself — verify your data is truly private
- Self-host on your own infrastructure if desired
- Contribute features or fix bugs via pull requests
- No vendor lock-in — export your data anytime
$ git clone owlcto/invoicing
Cloning into 'invoicing'...
$ npm install
$ npm run dev
Ready on http://localhost:3000
✓ Your invoicing app is live!Ready to Take Control of Your Invoicing?
No signup required. No credit card. No catch. Just open the portal and start creating invoices.