InvoiceFlow

A complete invoice and quote maker that runs entirely on your computer. Build polished A4 documents, turn accepted quotes into invoices in one click, track payments, and keep every customer and product in one place - with nothing stored in the cloud.

Quote → Invoice in one click
4 print-ready A4 templates
Payments, partial payments & overdue tracking
Full theme, font & currency customization

~~$20~~$13 one-time, yours forever

Buy on Etsy

Works offline Data stays private Free v1 updates

Capabilities

Everything It Does,
One Tab At A Time

See it in action

Real Screens,
Not Marketing Fluff

What is included

InvoiceFlow application (index.html + assets)
4 invoice/quote templates
Bundled fonts & icons (nothing loads from the internet)
README.html - full user guide
LICENSE.pdf - your usage rights
Sample data you can clear in one click

Requirements

Windows 10/11 (also works on macOS & Linux)
Any modern browser (Chrome, Edge, Firefox)
~15 MB free disk space
No internet connection required after download

Specifications

platformWindows · macOS · Linux

sizeSingle HTML file · under 100 KB

formatZIP → index.html

storageLocal (IndexedDB)

updatesFree within v1

Start Here guideGuided launch page

READMEFull usage instructions

InstallationUnzip and open, no install

LicenseStandard license

All sales, receipts, downloads and support records are handled securely through Etsy. After purchase on Etsy you receive the ZIP containing the app, this documentation, and the license.