Unix Timestamp Converter Online - No Signup

Convert epoch seconds, milliseconds, microseconds, or nanoseconds to readable dates-and convert calendar dates back to Unix time with accurate UTC and local-time handling.

Convert a Timestamp See how it works
Automatic unit detection UTC and local time Multiple time zones Instant private conversion

Unix Timestamp Converter

Convert timestamps and dates instantly. All calculations happen locally inside your browser, and no values are sent to a server.

100% local processing
Current Unix timestamp
-
Loading current time…
Milliseconds -
UTC time -
Negative timestamps and fractional seconds are supported when the date is within the browser's valid range.
Current timestamps usually use 10-digit seconds or 13-digit milliseconds.

Enter a Unix timestamp to begin.

01
Accurate conversion Milliseconds remain preserved
02
Multiple units Seconds through nanoseconds
03
Time-zone aware UTC, local, and IANA zones
04
Private by design Values remain in your browser
Epoch time made readable

Convert timestamps without time-zone confusion

This Unix Timestamp Converter translates numeric epoch values into readable calendar dates and converts dates back into Unix time. It supports seconds, milliseconds, microseconds, and nanoseconds with automatic unit detection.

A Unix timestamp identifies a single instant relative to January 1, 1970 at 00:00:00 UTC. The timestamp itself does not contain a time zone. UTC, local time, and regional time zones are simply different ways of displaying the same instant.

The converter provides ISO 8601, RFC-style, UTC, local, relative-time, weekday, and selected-time-zone results. Every output can be copied independently for use in code, databases, APIs, logs, testing, and documentation.

Convert calendar dates back to epoch time

Use the reverse converter to interpret a date as browser local time or UTC. The tool returns exact epoch values in seconds, milliseconds, microseconds, and nanoseconds while preserving the selected millisecond value.

Complete timestamp toolkit

Everything needed for accurate epoch conversion

A fast, accessible, and developer-friendly timestamp workflow for debugging, APIs, databases, logs, and testing.

Bidirectional conversion

Convert timestamps to dates or calendar dates back to epoch values without switching tools.

Automatic unit detection

Detect likely seconds, milliseconds, microseconds, or nanoseconds from the timestamp length.

Time-zone display

View the same timestamp in UTC, browser local time, or a selected international time zone.

Live current timestamp

Follow the current Unix timestamp in seconds and milliseconds with a pausable live clock.

One-click copying

Copy individual dates, timestamp values, or complete result groups directly to the clipboard.

Conversion history

Review recent conversions and quickly load a previous timestamp back into the converter.

Three simple steps

How to convert a Unix timestamp online

Convert epoch values without installing software or sending data to a remote service.

Step 1

Enter a timestamp

Paste an epoch value or use the live current timestamp generated by your browser.

Step 2

Choose the unit

Use automatic detection or explicitly select seconds, milliseconds, microseconds, or nanoseconds.

Step 3

Review and copy

View UTC, local, ISO, RFC, relative, and time-zone results, then copy the value you need.

Timestamp unit guide

Seconds vs milliseconds vs microseconds

Timestamp length is commonly used to identify the unit, although explicitly selecting the source unit is safest.

Unit
Typical length
Example and precision
Seconds
Usually 10 digits
1785686400 · one-second precision
Milliseconds
Usually 13 digits
1785686400000 · one-thousandth of a second
Microseconds
Usually 16 digits
1785686400000000 · one-millionth of a second
Nanoseconds
Usually 19 digits
1785686400000000000 · one-billionth of a second
Practical use cases

Where Unix timestamps are commonly used

Epoch values provide a compact, language-independent way to represent moments across systems.

01

APIs and backend services

Inspect request timestamps, token expiration, webhook events, caching, and scheduled jobs.

02

Databases and analytics

Understand stored epoch fields, event timelines, reporting windows, and imported datasets.

03

Logs and debugging

Convert machine-oriented timestamps into readable dates while investigating application behavior.

04

Testing and development

Generate deterministic epoch values for fixtures, scheduled events, expiration tests, and simulations.

Common questions

Unix timestamp converter FAQ

What is a Unix timestamp?

A Unix timestamp represents the amount of time elapsed since January 1, 1970 at 00:00:00 UTC. It is most commonly stored as seconds or milliseconds.

How do I convert a Unix timestamp to a date?

Enter an epoch timestamp, choose its unit or use automatic detection, and select Convert to Date. The converter displays UTC, local, ISO 8601, RFC, relative, and selected time-zone results.

How do I convert a date to a Unix timestamp?

Open the Date to Timestamp tab, select a date and time, choose whether it should be interpreted as browser local time or UTC, and select Convert to Timestamp.

Does a Unix timestamp include a time zone?

No. A Unix timestamp represents one absolute instant. Time zones only change how that instant is displayed as a calendar date and clock time.

What is the difference between seconds and milliseconds?

Unix seconds count whole seconds since the epoch and usually contain 10 digits for current dates. Milliseconds count thousandths of a second and usually contain 13 digits.

Can Unix timestamps be negative?

Yes. Negative Unix timestamps represent dates before January 1, 1970. Support for extremely old or distant dates is limited by the JavaScript Date range.

Why can local and UTC dates look different?

They represent the same instant but use different clock offsets. The browser-local result includes your system time zone and daylight-saving rules, while UTC always uses a zero offset.

Is this timestamp converter free?

Yes. The converter is free, requires no account, and performs all calculations locally inside your browser.

Ready to decode an epoch timestamp?

Convert Unix time to readable dates or generate precise timestamp values from calendar dates in seconds, milliseconds, microseconds, and nanoseconds.

Open Timestamp Converter