Simplicity by Design
JBSandbox builds simple browser-based productivity tools. Each app does one job well, with no bloat and no installs.
First Product
MarkSpot
A web-based PDF editor that lets you upload, annotate, and save PDFs without installing desktop software. A lightweight alternative to Adobe Acrobat.
- ✓Upload any PDF in seconds
- ✓Add highlights, notes, and shapes
- ✓Save and download the marked-up file
- ✓Works in any modern browser
About the Studio
JBSandbox is a small studio focused on shipping practical productivity tools for the web. The idea behind the name is straightforward: treat each app like an experiment — start small, ship fast, keep what works. The first product out of the sandbox is MarkSpot. From here, the plan is to keep building lightweight, single-purpose productivity apps that solve common, everyday tasks.
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