Unix Timestamp Countdown
Paste a Unix timestamp and watch it count down — or up. Add a label and share the link with your team.
Common developer use cases
Token expiry. JWT access tokens carry an exp claim in Unix seconds. Paste it here to see exactly when the token will stop working — useful when debugging an API that randomly starts returning 401 errors.
Rate limit resets. Many APIs return a X-RateLimit-Reset header with the Unix timestamp when the limit clears. Drop it here to see the human-readable reset time and a live countdown.
Scheduled jobs. When a cron job or background worker is scheduled to run at a specific epoch, paste the timestamp and confirm the countdown matches your expectation before the window arrives.
Frequently asked questions
What is this tool useful for?
Any time you need to know how long remains until (or since) a specific Unix timestamp. Common uses: watching a JWT or OAuth token expire, tracking a rate-limit reset, monitoring a deploy window, or checking when a scheduled job will fire.
Does it accept millisecond timestamps?
Yes. The tool auto-detects whether you pasted seconds (10 digits) or milliseconds (13 digits) using the same heuristic as the main epoch converter — digit count. Microseconds and nanoseconds are also accepted.
Can I share the countdown with someone?
Yes. The URL updates as you type, encoding the timestamp and label in the query string. Copy the browser address bar and send it — the recipient lands on an identical countdown.
What happens when the countdown reaches zero?
The display switches from 'Counting down' to 'Reached', then continues counting up as elapsed time. This is useful for confirming that a token actually expired at the right moment.
Can I count up from a past timestamp?
Yes — paste any past Unix timestamp and the timer shows how much time has elapsed since that moment. The direction label switches to 'elapsed since' automatically.