User Guide
Daily operations: clients, invoices, payments, taxes, and recurring flows.
Invoice Ninja
Free Source Available Invoicing, Expenses & Time-Tracking
Start with a live demo, then choose the right docs path for operations, development, self-hosting, or support.
Operations
Self Host Installation
Choose CLI, Docker, or manual install for your own infrastructure.
Hosted Platform
Quick start on the managed cloud platform with minimal setup.
Migration
Move from v4 to v5 with the migration checklist and rollout path.
Developer
Developer Guide
Architecture, extension points, gateway development, and technical workflows.
API Reference
Endpoint-level OpenAPI docs with request/response schemas.
API Authentication
Auth model, headers, and token setup for secure integrations.
Payment Gateways
Implement or customize payment gateway integrations.
Community
Support Forum
Search community answers and share your own setup notes.
Slack
Direct access to the team and community discussions.
Discord
Chat with other self-hosters and exchange deployment tips.
YouTube
Watch walkthroughs, release notes, and deep-dives.
Support
Self Host Troubleshooting
Fix install, cron, queue, update, and runtime issues for self-host.
Hosted Troubleshooting
Resolve common hosted account and platform issues quickly.
FAQ
Answers for common billing, setup, and workflow questions.
Contact Support
Reach out directly for help with account or technical blockers.