Free Unix Timestamp Generator
Grab the current Unix timestamp in one click. This free generator shows “now” in seconds and milliseconds with a live display — perfect for seeding test data, generating cache-busters, and stamping events.
How to Use the Unix Timestamp Generator
- The current Unix timestamp displays live — in seconds and milliseconds.
- Toggle auto-update to freeze or resume the ticking display.
- Click Copy seconds or Copy milliseconds.
- Or hit Generate now for a fresh one-off value.
Features
The display updates every second (toggleable), showing both 10-digit seconds and 13-digit milliseconds side by side with the human-readable UTC equivalent for verification. One-off generation captures an exact instant, and dedicated copy buttons grab each precision without selecting text.
Benefits & Use Cases
Developers generating test fixtures need realistic “now” values; frontend engineers create cache-busting query strings (?v=1700000000); API testers stamp requests with current epoch time. Faster and more reliable than typing date +%s in a terminal you might not have open.
Tips
For cache-busting, milliseconds give finer granularity and fewer collisions. When storing timestamps, prefer seconds unless you genuinely need sub-second precision — smaller numbers are easier to read and compare.
Frequently Asked Questions
What does this generator output?
The number of seconds (10 digits) or milliseconds (13 digits) since the Unix epoch — midnight UTC, 1 January 1970 — for the current moment.
Seconds or milliseconds — which do I need?
Most backend systems, JWTs, and databases use seconds. JavaScript’s Date.now() and many frontend APIs use milliseconds. Check your target system’s documentation.
Can I generate a timestamp for a different date?
This tool generates “now.” For arbitrary dates, use the Unix Timestamp Converter, which turns any date into its timestamp.
Is the timestamp based on my computer’s clock?
Yes — it reads your device’s system time. If your clock is wrong, the timestamp will be too; enable automatic time sync in your OS settings.
Is anything sent to a server?
No. The timestamp is read from your device clock locally — nothing is uploaded or stored.
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