Time & Date

Unix Timestamp Converter

Convert Unix timestamps to readable dates or dates back to Unix timestamps. Supports seconds and milliseconds — shows the live current timestamp updated every second.

Timestamp ↔ Date
Seconds & Milliseconds
Live Current Timestamp
Copy Instantly
Browser-only

Current Unix Timestamp

Updates every second · Seconds since Jan 1, 1970 UTC

Timestamp → Human-Readable Date

Unix timestamp

Unit

Date → Unix Timestamp

Date and time

Interpreted in your local timezone

Unix Timestamp Converter

Unix time represents a moment as elapsed time from 1970-01-01 00:00:00 UTC. It is compact, timezone-independent, and common in APIs, databases, logs, and programming languages.

Seconds and milliseconds

Unit	Example scale
Seconds	`1700000000`
Milliseconds	`1700000000000`

JavaScript uses milliseconds in Date, while many APIs expose seconds. Select the correct unit before converting.

Math.floor(Date.now() / 1000)
new Date(timestamp * 1000).toISOString()

The tool also converts a local date-time to both epoch seconds and milliseconds.

Frequently Asked Questions

Does this support milliseconds?: Yes. Select seconds or milliseconds when converting a timestamp.
What is a Unix timestamp?: A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is the most common way to represent moments in time in computer systems and APIs.
Are results timezone-aware?: The Local result uses your browser's timezone. ISO 8601 and UTC results identify the time in UTC.
What is the current Unix timestamp?: The current timestamp is shown in real time on this page. In JavaScript, you can get it with Date.now() (milliseconds) or Math.floor(Date.now() / 1000) (seconds).
Seconds vs milliseconds - which should I use?: Unix timestamps are traditionally in seconds. However, many programming languages and APIs (including JavaScript's Date.now()) use milliseconds. Always check the documentation - a timestamp of 1700000000000 is milliseconds (year 2023), while 1700000000 is seconds (year 2023).
What is the Year 2038 problem?: 32-bit systems store Unix timestamps as signed 32-bit integers, which overflow on January 19, 2038 at 03:14:07 UTC. Modern 64-bit systems are unaffected. This tool uses JavaScript's 64-bit float representation, so it handles dates well beyond the year 2038.
How do I convert a Unix timestamp in code?: JavaScript: new Date(timestamp * 1000). Python: datetime.fromtimestamp(timestamp). PHP: date('Y-m-d', timestamp). Note the ×1000 in JavaScript because it expects milliseconds.

Disclaimer

This tool is provided for general informational and utility purposes only. Results may be inaccurate, incomplete, outdated, or contain errors. Always verify results before relying on or using them.

Some tools may use AI, automated processing, third-party services, or server-side processing. Do not rely on these tools as a substitute for professional advice.

Use at your own risk. BestToolOnline makes no guarantees regarding the accuracy, reliability, completeness, availability, or suitability of results, to the maximum extent permitted by applicable law.

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Unix Timestamp Converter

Unix time represents a moment as elapsed time from 1970-01-01 00:00:00 UTC. It is compact, timezone-independent, and common in APIs, databases, logs, and programming languages.

Seconds and milliseconds

Unit

Example scale

Seconds

1700000000

Milliseconds

1700000000000

JavaScript uses milliseconds in Date, while many APIs expose seconds. Select the correct unit before converting.

Math.floor(Date.now() / 1000) new Date(timestamp * 1000).toISOString()

The tool also converts a local date-time to both epoch seconds and milliseconds.

Frequently Asked Questions

Does this support milliseconds?

Yes. Select seconds or milliseconds when converting a timestamp.

What is a Unix timestamp?

A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is the most common way to represent moments in time in computer systems and APIs.

Are results timezone-aware?

The Local result uses your browser's timezone. ISO 8601 and UTC results identify the time in UTC.

What is the current Unix timestamp?

The current timestamp is shown in real time on this page. In JavaScript, you can get it with Date.now() (milliseconds) or Math.floor(Date.now() / 1000) (seconds).

Seconds vs milliseconds - which should I use?

Unix timestamps are traditionally in seconds. However, many programming languages and APIs (including JavaScript's Date.now()) use milliseconds. Always check the documentation - a timestamp of 1700000000000 is milliseconds (year 2023), while 1700000000 is seconds (year 2023).

What is the Year 2038 problem?

32-bit systems store Unix timestamps as signed 32-bit integers, which overflow on January 19, 2038 at 03:14:07 UTC. Modern 64-bit systems are unaffected. This tool uses JavaScript's 64-bit float representation, so it handles dates well beyond the year 2038.

How do I convert a Unix timestamp in code?

JavaScript: new Date(timestamp * 1000). Python: datetime.fromtimestamp(timestamp). PHP: date('Y-m-d', timestamp). Note the ×1000 in JavaScript because it expects milliseconds.

Disclaimer

Some tools may use AI, automated processing, third-party services, or server-side processing. Do not rely on these tools as a substitute for professional advice.