Text tool
Unix Timestamp Converter
Convert Unix timestamps to readable dates and convert date-time values back to seconds or milliseconds.
Make seconds, milliseconds, and timezone explicit
Compare Unix seconds, Unix milliseconds, UTC, local time, and ISO 8601 before you copy a value into another system.
- Auto mode treats an absolute numeric value of 100000000000 or more as milliseconds; choose seconds or milliseconds explicitly when precision matters.
- Date-to-timestamp can interpret the date-time picker value as local time or UTC. The same visible clock value can represent different instants.
- The output includes Unix seconds, milliseconds, local time, UTC time, and ISO 8601 for cross-checking.
Conversion runs locally in the browser. Use UTC or an ISO 8601 value with an offset when sharing a time across systems.
How to Avoid Timezone, Unix Timestamp, and Cron Scheduling ErrorsUnix Timestamp Converter for Seconds and Milliseconds
Convert Unix timestamps to readable dates, and convert dates back to Unix seconds or milliseconds with local time, UTC, and ISO 8601 output.
What This Tool Does
This browser-based tool parses Unix timestamps in seconds or milliseconds, formats local and UTC date output, and converts selected date-time values into epoch time.
Common Use Cases
- Reading timestamps from logs, APIs, databases, or analytics events
- Converting a local or UTC date-time into Unix seconds or milliseconds
- Copying ISO 8601, UTC, local time, seconds, or milliseconds for testing
How Data Is Handled
Timestamp conversion runs in your browser. Date values and timestamps are not uploaded to the backend.
FAQ
Does this support seconds and milliseconds?
Yes. You can choose seconds, milliseconds, or auto-detection based on timestamp length.
Does the conversion use my local timezone?
Readable local output uses your browser timezone. The tool also shows UTC and ISO 8601 output.
Is any timestamp data sent to the server?
No. This tool runs locally in the browser.