Grow Revenue from Two Live Apps

Every jackgreen.top tool starts with a simple question: what do people actually need?

Two of our tools have been quietly making money — the Barcode & Label Generator (free, Code 128/EAN-13/UPC-A/Code 39) and the Invoice Payment Reminder Letter Generator ($9 one-time, no FreshBooks subscription required). Both are live, both work entirely in the browser, and both have proven demand.

This page is a cross-promotion hub. Instead of relying on each app to find the other on its own, we now bring both under one roof so visitors can discover them together.

The Problem Both Apps Solve

BarcodesInc charges $29/year for what we give away for free — and requires an account, a watermark on the free tier, and uploads your product data to their servers. Our barcode generator runs 100% client-side. Your data never leaves your browser.

FreshBooks costs $25–50/month for a full accounting platform when most sellers just need a professional payment reminder letter. Our tool generates those letters in seconds for a single $9 payment, or free for the demo. Again, nothing leaves your browser.

Why This Hub Exists

When someone lands on one of these tools, they should see the other. A seller generating barcodes for Etsy might also need to chase late-paying clients. A freelancer writing an invoice reminder might also need product barcodes.

No new features were built. No new payment flows. Just a simple reminder that both tools are live and solve real, everyday problems for free or near-free.

Links

• Barcode & Label Generator — free forever
• Invoice Payment Reminder Letter Generator — $9 one-time

Published on tools.jackgreen.top · September 2026