Unix Timestamp Converter

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Timestamp Landing Page

Timestamp Converter - Unix Timestamp to Date

Detect seconds, milliseconds, microseconds, and nanoseconds automatically, compare UTC with local time, and convert date-time back to Unix timestamp in one flow.

10 digits is usually seconds; 13 digits is usually milliseconds.

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πŸ’‘ Tip: Double-click to copy 3min later timestamp
πŸ’‘ Tip: Double-click to copy 3min later timestamp
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Current Timestamp (ms)
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Timestamp Conversion

Detect seconds, milliseconds, microseconds, and nanoseconds automatically, compare UTC with local time, and convert date-time back to Unix timestamp in one flow.

Format
GMT
Local Timezone
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3 min later
5 min later
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Weekday
Relative Time

Date Conversion

Convert a date-time value back to Unix timestamp.

Select date and time
Timestamp (s)
Timestamp (ms)
GMT
Local Timezone
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3 min later
5 min later
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Weekday
Relative Time

Quick Checks Before You Copy a Result

A fast timestamp check usually comes down to unit, timezone, and context.

  • Confirm the unit before debugging an API payload.
  • Use UTC when you want one globally stable display.
  • Use local time when you need to match a user's browser view.

Examples You Can Reuse

These examples cover common searches from logs, APIs, and date-time debugging workflows.

Example A: Convert a 10-digit Unix timestamp

Input: 1700000000

Detected: Seconds (10 digits)

UTC: 2023-11-14T22:13:20Z

Local Example: 2023-11-15 06:13:20 GMT+08:00

Sample local output shown for UTC+08:00. Your browser-local result can differ.

Example B: Convert a 13-digit millisecond timestamp

Input: 1700000000123

Detected: Milliseconds (13 digits)

UTC: 2023-11-14T22:13:20.123Z

Output: 1700000000 / 1700000000123

Example C: Convert UTC date-time back to Unix timestamp

Input: 2026-03-14T12:34:56Z

Output: 1773491696

Timestamp (ms): 1773491696000

UTC: 2026-03-14T12:34:56Z

Timestamp Guide and FAQ

What Is a Timestamp

A timestamp, also called a Unix timestamp or epoch time, is a number that represents a single instant in time.

In most systems it is counted from 1970-01-01 00:00:00 UTC, which makes it easy to compare, store, and exchange time across logs, APIs, and databases.

Timestamp Formats: Seconds vs Milliseconds

A 10-digit value is usually Unix seconds, while a 13-digit value is usually milliseconds.

One of the most common mistakes is using JavaScript Date.now() output as if it were seconds. Date.now() returns milliseconds, so mixing the two creates a 1000x offset.

  • 10 digits: usually seconds
  • 13 digits: usually milliseconds
  • 16 digits: usually microseconds
  • 19 digits: usually nanoseconds

Timestamp to UTC and Local Time

A Unix timestamp does not contain timezone information. It represents the same instant everywhere.

UTC output stays the same for everyone, but local time changes with the viewer's timezone and daylight saving rules. That is why the same timestamp can show different clock times in different places.

FAQ

Is a timestamp in seconds or milliseconds?

By convention, Unix timestamps are usually stored in seconds. A 10-digit value is commonly seconds, while a 13-digit value is commonly milliseconds.

Why does the same timestamp show different local times?

The timestamp represents the same instant globally, but the formatted local clock time depends on timezone and daylight saving rules.

Does a timestamp contain timezone information?

No. A Unix timestamp is timezone-agnostic and only becomes UTC or local time when it is formatted for display.

How do I get the current Unix timestamp?

Most timestamp tools display it live. In JavaScript, Date.now() returns milliseconds and Math.floor(Date.now() / 1000) returns Unix seconds.

How do I convert timestamp to date?

Paste the timestamp into a converter and read the UTC or local datetime output. The most important step is confirming whether the input is seconds or milliseconds.

How do I convert unix timestamp to datetime?

Paste the Unix timestamp, let the tool detect the unit, and read the full UTC or local datetime output. If you only need clock output, the same conversion also helps you convert unix timestamp to time.

How do I convert date to Unix timestamp?

Choose or type a date-time value, then convert it into Unix seconds or milliseconds. UTC and browser-local inputs can represent the same instant differently when displayed.

Can Unix timestamps be negative?

Yes. Negative timestamps represent moments before 1970-01-01 00:00:00 UTC, although support can vary across runtimes and databases.

What is the Year 2038 problem?

Some 32-bit systems store Unix seconds in a signed 32-bit integer, which overflows in January 2038. Modern 64-bit systems are not affected by that limit.

Need the broader Unix Timestamp Converter home page with related tools?

Timestamp Converter - Unix Timestamp to Date | Unix Timestamp Converter