About JBSandbox

JBSandbox is a small studio building simple, browser-based productivity tools. We treat each app like an experiment — start small, ship fast, keep what works.

The first product out of the sandbox is MarkSpot, a web-based PDF editor that lets you upload, annotate, and save PDFs without installing desktop software — a lightweight alternative to Adobe Acrobat.

From here, the plan is to keep building lightweight, single-purpose productivity apps that handle common everyday tasks well, without the bloat of all-in-one software suites.