Free, runs entirely in your browser — no sign-up, no file upload to a server.
What does Countdown Timer do?
It counts down to any date and time you set, for an event or deadline.
Is my data saved if I close the tab?
Yes — it's saved to your browser's local storage, so it's there when you come back, but it stays on this device/browser only (it won't sync to another device, and clearing your browser data will clear it too).
Is my data sent anywhere?
Everything runs in your browser — nothing you type or paste is sent to a server.
How do I report a problem or request a feature for this tool?
Use the Contact / Feedback page — select "Countdown Timer" as the related tool so we know exactly which tool you mean, then describe the bug or the feature you'd like to see.