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Translate between Unix seconds, Unix milliseconds, UTC, and local date-time formats without leaving the browser.
What this tool helps you answer
Use this tool when logs, APIs, databases, or analytics events store time as raw epoch numbers.
Next step
Translate between Unix seconds, Unix milliseconds, UTC, and local date-time formats without leaving the browser.
Editorial review
This page combines the live tool, input guidance, worked examples, and operating limits so Timestamp Converter: Unix, ISO and Local stays useful even before users interact with the calculator.
Reviewed by Klartext Tools against the current Timestamp Converter: Unix, ISO and Local workflow on 2026-03-19.
Last updated:
Use with judgment
Page scope
Use this tool when logs, APIs, databases, or analytics events store time as raw epoch numbers.
Review the output with Conversion mode set to timestamp-to-date, then compare it with the method and limitations on this page before changing other inputs.
Change Timestamp or date string to 1710934800 or 2026-03-20T09:15:00Z while keeping the rest of the Timestamp Converter: Unix, ISO and Local scenario stable.
If the result moves sharply after changing Timestamp or date string, treat the tool output as sensitive and validate the source input before acting.
Paste a Unix timestamp to decode it or choose a local date and time to convert it into Unix seconds and milliseconds.
Enter any integer into the timestamp field and click Convert from timestamp. The tool auto-detects whether the value is seconds (10 digits) or milliseconds (13 digits) and outputs both formats together.
Use the date-time picker to select a moment in your local time zone and click Convert from date. You get back the Unix seconds and milliseconds for that instant.
The result shows Unix seconds, Unix milliseconds, ISO 8601, UTC, and local time together. Compare them side by side to confirm the timezone offset and unit before copying.
Click Now to load the current time in both input fields and convert it immediately. The current time display in the panel also refreshes every second as a live reference.
Use this tool when logs, APIs, databases, or analytics events store time as raw epoch numbers.
Sample inputs
Sample outcome: Review the output with Conversion mode set to timestamp-to-date, then compare it with the method and limitations on this page before changing other inputs.
Change Timestamp or date string to 1710934800 or 2026-03-20T09:15:00Z while keeping the rest of the Timestamp Converter: Unix, ISO and Local scenario stable.
Sample inputs
Sample outcome: If the result moves sharply after changing Timestamp or date string, treat the tool output as sensitive and validate the source input before acting.
Timestamp bugs usually come from unit confusion or timezone confusion. Showing seconds, milliseconds, UTC, and local time together makes those mistakes obvious faster.
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