What is a Unix timestamp (Epoch time)?

A Unix timestamp is the total number of elapsed seconds since the Unix Epoch: midnight UTC on January 1, 1970, excluding leap seconds. It is the universal standard for date/time representation in operating systems, databases, and APIs.

How can I tell if a timestamp is in seconds or milliseconds?

A 10-digit timestamp (e.g. 1779274800) represents seconds. A 13-digit timestamp (e.g. 1779274800000) represents milliseconds. This converter automatically detects and handles both.

What is the Year 2038 problem (Y2038)?

On January 19, 2038, standard 32-bit signed integer timestamps will exceed their maximum value (2,147,483,647) and wrap around to negative numbers. Modern 64-bit systems will continue working correctly for billions of years.

Time

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates, ISO 8601 strings, UTC, and local time instantly.

Quick Answer & Summary

A Unix timestamp represents the number of seconds that have passed since the Unix Epoch (January 1, 1970, 00:00:00 UTC). To convert an epoch timestamp in JavaScript, multiply seconds by 1000 and pass to new Date(timestamp * 1000).

Unix Epoch Formula

Unix_Seconds = floor((Date_ms - 1970-01-01T00:00:00Z_ms) / 1000) | Date = new Date(Unix_Seconds × 1000)

POSIX standard representation of time as a continuous elapsed second counter.

Unix Epoch to Readable Date & Time

Unix Timestamp (seconds or ms)

Local Device Time

Aug 31, 2026, 11:39:26 AM

ISO 8601: 2026-08-31T11:39:26.000Z

UTC RFC 2822: Mon, 31 Aug 2026 11:39:26 GMT

Readable Date to Unix Epoch Seconds

Select Date & Time

Unix Epoch Timestamp (10 digits)

1788176340

Share This Tool

Help your team and fellow developers save time with free, private client-side utilities.

X (Twitter)LinkedIn WhatsApp Reddit Facebook

Toolbox Editorial TeamVerified Authors

Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools

Updated: August 2026

100% In-BrowserZero server storage

Standards AuditedRFC & ISO compliant

Peer ReviewedEditorial Policy

Documentation & Guide

How to Use Unix Timestamp Converter

Convert Epoch to Date

Paste or enter a 10-digit (seconds) or 13-digit (milliseconds) Unix timestamp to view local time, UTC, and ISO 8601 strings.

Convert Date to Epoch

Select any date and time to generate its exact numerical Unix timestamp.

Copy Timestamps

One-click copy for ISO 8601, RFC 2822 UTC, and raw epoch integer strings.

Pro Tips

Automatically handles both 10-digit seconds and 13-digit millisecond timestamps

Practical Examples & Conversions

Input

Output

1970-01-01T00:00:00.000Z

Frequently Asked Questions (PAA)

Related Tools & Converters

Timestamp Converter

General timestamp and format utility

Discord Timestamps

Generate dynamic Discord chat timestamps

Time Format Converter

Convert 12h to 24h military time

Seconds Converter

Convert seconds to HH:MM:SS format

Authoritative Standards & Citations

Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:

International Organization for Standardization

ISO 8601: Date and Time Formats

Internationally accepted standard for representing dates and times.

Internet Assigned Numbers Authority

IANA Time Zone Database (TZDB)

Authoritative historical and current daylight saving time (DST) database.