Timestamp Converter

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Enter a Unix timestamp or date string above to see all converted formats.

How to Use

1

Enter a timestamp or date
Type a Unix timestamp (seconds or milliseconds) or any ISO date string into the input field.
2

Or click Now for current time
Hit the Now button to instantly fill the current Unix timestamp and see all formats for the present moment.
3

See all formats instantly
The tool converts your input into UTC, Local time, ISO 8601, Unix seconds, milliseconds, and a relative time description — all at once.
4

Copy any format
Click the copy icon next to any output row to copy that specific format to your clipboard.

Common Use Cases

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API Debugging

Quickly decode Unix timestamps returned by REST APIs into human-readable dates to verify request and response timing.

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Log Analysis

Convert raw numeric timestamps from server logs, databases, or monitoring tools into readable dates for faster incident investigation.

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Date Arithmetic

Use Unix seconds as a common unit to calculate durations, deadlines, and intervals between two points in time without timezone confusion.

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Cross-Timezone Coordination

See UTC and local time side by side to schedule meetings or sync deployments across distributed teams in different timezones.

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp is the number of seconds elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). It is a universal, timezone-independent way to represent a point in time used by virtually all programming languages and operating systems.

What is the difference between Unix seconds and Unix milliseconds?

Unix seconds count whole seconds since the epoch and are 10 digits long for current dates. Unix milliseconds count thousandths of a second and are 13 digits long. Many JavaScript APIs (like Date.now()) return milliseconds, while most server-side languages and databases use seconds.

Does the tool handle both seconds and milliseconds automatically?

Yes. If you enter a 13-digit (or longer) number the tool treats it as milliseconds; shorter numbers are treated as seconds. You can also paste any ISO 8601 or other standard date string.

What is the maximum Unix timestamp this tool can handle?

JavaScript's Date object supports dates up to approximately ±8,640,000,000,000,000 milliseconds from the epoch, which covers hundreds of millions of years in both directions — far beyond practical use.

Is my data sent to a server?

No. All conversion happens locally in your browser using JavaScript. No data is transmitted anywhere.