Countdown Timer (Time Until)
Enter a target date or date-time and get the exact time remaining: days/hours/minutes/seconds breakdown plus totals in each unit. Accepts "YYYY-MM-DD", "YYYY-MM-DD HH:MM", or full ISO-8601 strings with timezone. If the target is in the past, the result is negative (time since). This is a one-shot calculator — for a live ticking countdown that updates every second, you'll want a different tool or your phone's timer app. Runs entirely in your browser.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Calculator
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Convert a time from any timezone to any other — Central to Pacific, UTC to Tokyo, you name it.
Frequently asked
Is Countdown Timer (Time Until) free to use?
Yes. Countdown Timer (Time Until) is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Countdown Timer (Time Until) runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Countdown Timer (Time Until) work?
Open Countdown Timer (Time Until), paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does Countdown Timer (Time Until) support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. Countdown Timer (Time Until) uses standard web APIs and does not require any plugin, extension, or sign-up.