How do I know if my timestamp is in seconds or milliseconds?

A 10-digit Unix timestamp represents time in seconds (e.g. 1700000000), while a 13-digit timestamp represents time in milliseconds (e.g. 1700000000000).

What is the Year 2038 Problem (Y2K38)?

The Y2K38 problem affects legacy 32-bit systems storing Unix timestamps as signed integers, which will overflow on January 19, 2038. Modern 64-bit systems resolve this overflow issue.

Is this timestamp converter free to use?

Yes, MicroToolStack's Unix Timestamp Converter is 100% free with unlimited conversions and no account sign-up required.

Free Online Unix Timestamp Converter | Epoch Time to Date

Q: What is a Unix Timestamp (Epoch Time)?

A Unix Timestamp (or Epoch Time) is a system for tracking time represented as the total number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC (Coordinated Universal Time), excluding leap seconds.

1. Convert Unix Timestamp ➔ Human Date

Enter Unix Timestamp (Seconds or Milliseconds)

UTC Format String

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Your Local Timezone

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ISO 8601 Format

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2. Convert Human Date ➔ Unix Timestamp

Select Date & Time

Epoch Timestamp (Seconds)

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Epoch Timestamp (Milliseconds)

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Understanding Unix Epoch Time in Web Systems and Databases

A Unix Timestamp (also referred to as Epoch Time, POSIX time, or Unix time) represents a system for measuring time as a single integer number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC (Coordinated Universal Time), excluding leap seconds.

In software development, server log auditing, and relational database engineering (MySQL, PostgreSQL, MongoDB), storing timestamps as single integer numbers eliminates complex time zone offset conversions and daylight saving time confusion across global server nodes. Our free Online Unix Timestamp Converter offers instant two-way conversions between raw Epoch integers and human-readable UTC/local date strings.

Seconds vs. Milliseconds: How to Identify Timestamp Formats

When working with backend APIs (such as JavaScript, Python, PHP, or Java), developers frequently encounter two different epoch timestamp lengths:

1. 10-Digit Timestamps (Seconds)

Standard Unix timestamps consist of 10 digits (e.g., 1700000000). Most server environments—including PHP, Python, C++, and Linux bash tools—measure Unix time in seconds.

2. 13-Digit Timestamps (Milliseconds)

Modern web environments (such as JavaScript Date.now(), Java, and MongoDB ObjectIds) record time in milliseconds, resulting in 13 digits (e.g., 1700000000000).

Features of MicroToolStack's Epoch Converter

Real-Time Live Clock: Displays the current ticking Unix Epoch timestamp in seconds and UTC date format.
Bidirectional Date Conversion: Effortlessly convert Epoch integers to local dates or select dates via calendar picker to generate Epoch integers.
100% Client-Side Privacy: All time calculations execute locally inside your web browser session using JavaScript. No timestamps or dates are recorded remotely.
Free & Unlimited Usage: No conversion limits or account sign-ups required.

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Frequently Asked Questions (FAQs)

What is Unix Epoch Time?

Unix Epoch Time is the total number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC.

Why is January 1, 1970 used as the Epoch start date?

Early Unix operating system engineers selected January 1, 1970 as a convenient, arbitrary epoch baseline for system clock measurements.

Is my date input stored on remote servers?

No. All conversions run client-side inside your browser session using JavaScript. Your inputs remain private.

Is this timestamp converter free?

Yes, MicroToolStack's Unix Timestamp Converter is 100% free with no usage limits or sign-up required.

Online Unix Timestamp & Epoch Converter