How does scale auto-detection work?

Numbers below ~10¹¹ are treated as seconds, below ~10¹⁴ as milliseconds, larger as microseconds. The detected scale is shown on the auto chip; override if needed.

ISO 8601 is the international standard for date and time, e.g. 2024-01-15T13:45:00.000Z. It is always in UTC when ending with "Z".

Why is local time different from UTC?

Local time is your browser's timezone offset applied to the same instant. The Unix timestamp is the same instant regardless of timezone.

Is anything uploaded?

No — every conversion is local to your browser.

Home
Date & Time Tools
Unix Timestamp Converter

Date & Time Tools

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Auto-detects seconds, milliseconds, and microseconds.

Date & Time Tools

Date Difference Calculator

Calculate the exact difference between two dates — years, months, days, hours, minutes, and business days.

Date & Time Tools

Timezone Converter

Convert any wall time between IANA timezones and view a live world clock. DST-aware. Powered by your browser's Intl.

Date & Time Tools

Countdown Timer

Build a live countdown to any moment — birthday, launch, deadline. Share the link to send the same countdown to anyone.

About Unix Timestamp Converter

A precision Unix timestamp converter. Paste any numeric timestamp — the engine auto-detects whether it is seconds, milliseconds, or microseconds and outputs ISO 8601 UTC, UTC string, local string, and a relative description. Or pick a date and instantly get seconds, milliseconds, and ISO 8601.

How to use

Pick a direction: Timestamp → Date or Date → Timestamp.
For Timestamp → Date: paste a number. The scale is auto-detected.
Override the scale chip if you know the format.
Copy any of the formatted outputs with one click.

FAQ

Frequently asked questions

Got questions? We’ve got answers. Here are some of the most common inquiries about Unix Timestamp Converter.

Home
Date & Time Tools
Unix Timestamp Converter

Date & Time Tools

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Auto-detects seconds, milliseconds, and microseconds.

Unix timestamp converter

Auto-detects seconds, milliseconds & microseconds.

Timestamp

Scale:

ISO 8601 (UTC)

2026-05-18T12:57:28.000Z

UTC

Mon, 18 May 2026 12:57:28 GMT

Local

Mon May 18 2026 14:57:28 GMT+0200 (Central European Summer Time)

Relative

just now

Date & Time Tools

Date Difference Calculator

Calculate the exact difference between two dates — years, months, days, hours, minutes, and business days.

Date & Time Tools

Timezone Converter

Convert any wall time between IANA timezones and view a live world clock. DST-aware. Powered by your browser's Intl.

Date & Time Tools

Countdown Timer

Build a live countdown to any moment — birthday, launch, deadline. Share the link to send the same countdown to anyone.

About Unix Timestamp Converter

How to use

Pick a direction: Timestamp → Date or Date → Timestamp.
For Timestamp → Date: paste a number. The scale is auto-detected.
Override the scale chip if you know the format.
Copy any of the formatted outputs with one click.

FAQ

Frequently asked questions

Got questions? We’ve got answers. Here are some of the most common inquiries about Unix Timestamp Converter.

Unix timestamp converter

Auto-detects seconds, milliseconds & microseconds.

Timestamp

Scale:

ISO 8601 (UTC)

2026-05-18T12:57:28.000Z

UTC

Mon, 18 May 2026 12:57:28 GMT

Local

Mon May 18 2026 14:57:28 GMT+0200 (Central European Summer Time)

Relative

just now

Related tools

About Unix Timestamp Converter

How to use

Frequently asked questions

How does scale auto-detection work?

What is ISO 8601?

Why is local time different from UTC?

Is anything uploaded?

Related tools

About Unix Timestamp Converter

How to use

Frequently asked questions

How does scale auto-detection work?

What is ISO 8601?

Why is local time different from UTC?

Is anything uploaded?