About JL Hacks

We build simple, powerful tools that run entirely in your browser. No accounts, no cloud, no subscriptions.

Every tool we make is a single HTML file. You download it, open it in your browser, and it just works. Your data is stored locally on your device using your browser's built-in storage. We never see it, we never collect it, and we never will.

We believe that the best productivity tools are the ones that get out of your way. No loading screens, no login walls, no "your free trial has expired" popups. Just open the file and get to work.

Our Philosophy

  • Privacy first. Your financial data, grades, and business numbers are yours alone.
  • Offline always. Works on planes, in the field, or anywhere without WiFi.
  • Pay once. No monthly fees. One purchase, lifetime access.
  • Simple by design. Every tool does one thing really well.
Browse our tools