Timestamp Converter

Timestamp Converter Overview

A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970 00:00:00 UTC. It is widely used in logs, APIs, and databases to represent time.

This tool converts between second-based and millisecond-based timestamps and human-readable date/time, with optional timezone selection, so you can quickly convert times when debugging, troubleshooting, or migrating data.

How to Use

Timestamp to Date

Enter a 10-digit (seconds) or 13-digit (milliseconds) timestamp in the input; the tool shows the corresponding local and UTC time and lets you switch timezones.

Date to Timestamp

Use the date/time picker to select or enter a date and time; the tool computes and displays the corresponding second and millisecond timestamps for use in code or APIs.

Current Time

Click "Current time" to fill in the timestamp or date for "now" for quick reference.

FAQ

Is the timestamp in seconds or milliseconds?

In practice, JavaScript's Date.now() uses milliseconds (13 digits), while many backends (e.g. Unix) use seconds (10 digits). This tool infers from the digit count and shows both second and millisecond results.

Why does the same timestamp show different times in different timezones?

The timestamp represents a single moment in UTC; converting to different timezones yields different local times. Use the timezone selector to compare.

Are there range limits for timestamps?

Standard 32-bit Unix seconds overflow around 2038; millisecond timestamps are fine for normal use. This tool supports common positive timestamp ranges.