What is a Unix timestamp?

It is the number of seconds that have passed since 1 January 1970 00:00:00 UTC, known as the Unix epoch. Many systems and APIs store dates this way.

How do I know if it is seconds or milliseconds?

The tool detects it automatically: 10-digit values are treated as seconds and 13-digit values as milliseconds.

Which time zone is used?

Results are shown in UTC and in your own browser's local time zone. A Unix timestamp itself has no time zone.

Can it handle dates before 1970?

Yes. Negative timestamps represent dates before the epoch.

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and back, with automatic seconds/milliseconds detection and live current time.

Free
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Current Unix time: —

Unix timestamp (seconds or milliseconds)

…or pick a date & time

—

Overview

Convert Unix epoch timestamps to human-readable dates and back, with automatic seconds/milliseconds detection and live current time.

Benefits

Both directions in one tool
Auto-detects seconds vs milliseconds
UTC, ISO 8601, and local time
Live current Unix time

Use Cases

Reading timestamps in server logs
Debugging API responses
Checking token expiry times
Setting dates in databases and scripts

Users Also Use

How to Use

Paste a Unix timestamp in seconds or milliseconds, or pick a date and time.
Click Convert, or press Use current time to start from now.
Read the result in seconds, milliseconds, UTC, ISO 8601, and your local time.

FAQ

What is a Unix timestamp?: It is the number of seconds that have passed since 1 January 1970 00:00:00 UTC, known as the Unix epoch. Many systems and APIs store dates this way.
How do I know if it is seconds or milliseconds?: The tool detects it automatically: 10-digit values are treated as seconds and 13-digit values as milliseconds.
Which time zone is used?: Results are shown in UTC and in your own browser's local time zone. A Unix timestamp itself has no time zone.
Can it handle dates before 1970?: Yes. Negative timestamps represent dates before the epoch.

About Unix Timestamp Converter

Debug logs, API responses, and database values faster with our Unix Timestamp Converter. Convert in both directions, see the ISO 8601 and UTC forms side by side, and check how long ago or how far ahead a timestamp is.