What is the difference between Unix seconds and milliseconds?

Unix time in seconds is a 10-digit number (e.g., 1715000000). JavaScript and many web APIs use milliseconds, which is a 13-digit number (the seconds value multiplied by 1000). This tool detects the format automatically based on the number of digits.

What is the current Unix timestamp?

The current Unix timestamp changes every second. You can see the live value at the top of this page. In JavaScript, use Date.now() for milliseconds or Math.floor(Date.now()/1000) for seconds.

What is ISO 8601 format?

ISO 8601 is an international standard for representing dates and times. The format looks like 2026-05-13T10:00:00.000Z, where the trailing Z indicates UTC. It is the recommended format for APIs and data interchange because it is unambiguous and sortable.

How do I get the Unix timestamp in JavaScript?

Use Date.now() to get milliseconds, or Math.floor(Date.now() / 1000) to get seconds. You can also use new Date().getTime() for milliseconds. For a specific date, use new Date('2026-01-01').getTime() / 1000.

Tools / Unix Timestamp Converter

Unix Timestamp Converter

Convert epoch time to a human-readable date, or pick a date to get its Unix timestamp. All conversions run in your browser.

Current Unix Time Live

Seconds

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Milliseconds

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Timestamp → Date

Date → Timestamp

Quick Reference — Get Timestamp in Code

JavaScript

Math.floor(Date.now() / 1000)  // seconds
Date.now()                     // milliseconds

Python

import time
int(time.time())               # seconds

time.Now().Unix()              // seconds
time.Now().UnixMilli()         // milliseconds

PHP

time()                         // seconds
(int)(microtime(true) * 1000)  // milliseconds

Rust

SystemTime::now()
    .duration_since(UNIX_EPOCH)
    .unwrap().as_secs()        // seconds

FAQ

What is a Unix timestamp?

A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970, 00:00:00 UTC — the "Unix epoch." It is timezone-independent and used universally in APIs, databases, and server logs because it is a single integer that is easy to compare or do arithmetic on.

Seconds or milliseconds — how do I tell the difference?

A 10-digit number is almost certainly seconds (e.g., 1715000000 is roughly May 2024). A 13-digit number is milliseconds (the same value × 1000). JavaScript's Date.now() returns milliseconds; most server-side languages and Unix utilities return seconds.

What is ISO 8601?

ISO 8601 is an international date/time standard. The format looks like 2026-05-13T10:00:00.000Z. The trailing Z means UTC. It is sortable as a string, unambiguous across locales, and recommended for all API data interchange.

Is this tool private?

Yes. All conversions run entirely in your browser using JavaScript. No data is sent to any server. You can even use this tool offline after the page loads.