Documentation & Help Center

Everything you need to know about generating invoices with AI. From beginner tutorials to advanced guides.

Quick Start Guide Try It Now

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Getting Started

Your First Invoice in 5 MinutesPopular

Complete beginner's guide with screenshots and video tutorial

Uploading Documents

Supported file types, size limits, and best practices

Understanding AI Extraction

How the AI reads your documents and extracts invoice data

How-To Guides

Invoice for Expenses & Reimbursements

Step-by-step guide for billing travel and business expenses

Attach Receipts to Invoices

How to include reimbursement receipts in your PDF

Edit Invoice Data Before Generating

Using the JSON editor to correct or adjust extracted data

Troubleshooting

Common Issues & Solutions

OCR failures, extraction errors, quota limits, and fixes

Why Is My OCR Failing?

Troubleshoot image quality, file format, and scanning problems

Understanding Quota Limits

How the free tier works and when quotas reset

Advanced

API Documentation

Integrate invoice generation into your own application

Supported File Formats

Complete list of supported PDFs, images, and documents

Data Privacy & Security

How we handle, encrypt, and delete your documents

Frequently Asked Questions

Is Instant Invoice really free?▼

Yes! The free tier includes 5 invoices per month. Perfect for freelancers and consultants who invoice occasionally. No credit card required.

What file types are supported?▼

We support PDFs, PNG, JPG, and most image formats. Files can be native PDFs, scanned documents, or photos. Maximum 10MB per file.

How accurate is the AI extraction?▼

95%+ accuracy on typed documents with clear formatting. The AI can read contracts, receipts, timesheets, and invoices. You can always edit extracted data before generating the PDF.

Is my data secure?▼

Yes. Documents are encrypted in transit (TLS), processed, and automatically deleted after 24 hours. We don't train AI models on your data or store documents permanently.

See all FAQs →

Still Have Questions?

The best way to learn is by trying. Generate your first invoice in under 10 seconds.

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