Your process data never leaves the device
Factory measurements, customer drawings, and audit trails stay local. There is no SpcLite upload API for worksheet contents.
Open SpcLiteIndexedDB on this machine
Projects autosave in the browser. Export .spclite files when you need backup or to move work between computers.
PWA offline
After the first visit, the app shell and assets cache via a service worker so you can keep working without a network.
Pure TypeScript stats kernel
Calculations run in-page. Key statistics are checked against scipy-generated golden fixtures in CI — no mystery remote engine.
Built for locked-down sites
Useful when cloud SaaS is blocked, air-gapped labs are common, or IT will not approve another data processor.