Type a cron expression (5 fields or @daily-style aliases) and read the schedule in plain words, see the next 10 run times in your named timezone with a UTC toggle, and inspect every field’s parsed values. Invalid input names the offending field.
Privacy ledger
Data acquired
None.
Libraries used
Lit 3 — bundled into the tool file itself.
Data stored
None.
Data transmitted
None.
Use it on your own page
Download the tool as a single self-contained HTML file: readable source with the Lit library included, zero network requests — it works opened straight from your disk, and you can customize everything.