Privacy

Last updated 30 October 2026.

What stays on your device

Everything you type or import — expressions, time zones, blackout calendars, backups — is processed in your browser. CronViewer has no server-side code and no user accounts. The page loads its own static files and nothing else.

Local storage

Your last workspace, saved schedules and test vectors are kept in your browser’s IndexedDB so they survive a reload. Your theme choice is kept in localStorage. This data never leaves the device; it is not synced. Delete it any time with “Delete all local data” in the workspace side panel, or by clearing site data in your browser.

Share links

Share links put the schedule after the # in the URL. Browsers do not send that part to servers, but anyone you give the link to can read it.

Offline cache

A service worker caches CronViewer’s own static files so the tool works offline. It never caches or sends your input.

Advertising and analytics

The site is built with advertising disabled and no analytics. If advertising is enabled in future, this page will be updated first, consent will be requested where the law requires it, and ads will never receive your expressions.