Unix Timestamp Converter Online — Epoch Time to Date Free

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It is the universal standard for representing time in computing systems.

Why Unix timestamp?

Before Unix time, every system used different date formats and timezones — making date arithmetic across systems a nightmare. Unix time solves this by storing a single integer that is unambiguous anywhere in the world. Converting to a local timezone happens at display time, not at storage time.

Key Unix timestamps

The Year 2038 problem

32-bit systems store Unix timestamps as a signed 32-bit integer, which maxes out at 2,147,483,647 — January 19, 2038. After that, it overflows to a large negative number. Modern 64-bit systems don't have this problem (their overflow is ~292 billion years from now), but embedded systems and older databases may still be affected.

Seconds vs milliseconds

Many systems (JavaScript, Java, Android) use milliseconds instead of seconds. A millisecond timestamp is roughly 1000x larger:

• Seconds: 1700000000 (10 digits)
• Milliseconds: 1700000000000 (13 digits)

If a timestamp has 13 digits, divide by 1000 to get seconds. Our converter auto-detects this.

How to convert Unix timestamp online

Timestamp → Date:

1. Go to Unix Timestamp Converter
2. Enter the timestamp in the input field
3. Select your timezone from the dropdown
4. The human-readable date and time appears instantly

Date → Timestamp:

1. Switch to the Date → Timestamp tab
2. Enter a date and time
3. Select your timezone
4. The Unix timestamp in both seconds and milliseconds is shown

Using Unix timestamps in code

// JavaScript — current timestamp in seconds
Math.floor(Date.now() / 1000)

// JavaScript — current timestamp in milliseconds
Date.now()

// Convert timestamp to Date object
new Date(1700000000 * 1000)

// Python
import time
int(time.time())

Convert Unix timestamps free →