How It Works
From receipt to paid invoice in three simple steps.
Upload or Type
Use our AI-powered OCR to scan a physical receipt, or type your line items manually.
Customize & Predict
Choose a premium template, convert currencies, and instantly see the ML late-payment risk score.
Send & Automate
Email the PDF directly to your client. Our CRON job will automatically follow up if it becomes overdue.
Powerful Features
Everything you need to manage your billing, entirely serverless.
Live PDF Rendering
Pixel-perfect WYSIWYG preview powered by headless Chromium.
AI Receipt Scanner
Extract line items and prices from images instantly using Tesseract.js.
Predictive ML Dashboard
Know which clients will pay late before you even send the invoice.
Automated Reminders
Never chase a payment again. Vercel Cron jobs send emails for you.
Live Currency Conversion
Fetch real-time exchange rates and convert your entire invoice instantly.
Free & Open Source
No hidden fees, no subscriptions. Host it yourself on Vercel for free.
Frequently Asked Questions
Do I need to create an account?
No! If you are running this locally, your data is saved in a local SQLite database. If you deploy it to your own Vercel account, you control the data completely.
How does the ML Risk Score work?
Our Machine Learning model was trained on historical synthetic invoice data. It evaluates parameters like total amount, tax rates, and payment terms to predict the statistical probability of a late payment.
Are there any hidden fees?
None. InvoFlow is open source. You can fork it and use it entirely for free within Vercel's generous Hobby tier limits.
About InvoFlow
InvoFlow was created to solve a simple problem: traditional invoicing software is bloated, expensive, and slow. We wanted to build a tool that felt as fast as a modern SaaS app, looked beautiful, and was entirely free for freelancers and small businesses to host themselves.
By leveraging Vercel's serverless edge and the Next.js App Router, InvoFlow operates with zero fixed server costs while delivering premium features like OCR and Machine Learning.