Why use Unix timestamps?

They are compact, they sort chronologically as plain numbers, every programming language can handle them without a parser, and arithmetic is trivial — add or subtract seconds and you have moved through time. Those properties make them the default representation in APIs, databases, and log files across the industry.

Seconds vs milliseconds?

Classic Unix uses seconds and produces ten-digit values today. JavaScript's Date.now() instead returns milliseconds, which is 1000 times larger and lands on thirteen digits. The digit count is the easiest way to tell them apart, and converting between them is a multiply or divide by 1000.

What's the year 2038 problem?

Systems that store Unix timestamps in a 32-bit signed integer overflow on January 19, 2038. After that point, the value wraps around to a negative number and software starts producing wrong dates. Modern 64-bit systems are unaffected for the next 292 billion years, but plenty of legacy embedded code still uses 32-bit storage.

How do I handle time zones?

The Unix timestamp itself is timezone-neutral; it always represents seconds since the UTC epoch. Time zones come into play only at display time, when you decide which wall clock to show. In JavaScript, new Date(timestamp).toString() renders local time and toISOString() renders UTC, and most converters expose both side by side.

What about microseconds and nanoseconds?

Microseconds (16 digits) and nanoseconds (19 digits) appear in specialized contexts like scientific instruments and high-frequency trading systems. Everyday application code lives in seconds or milliseconds, and most converters focus on those two scales.

Daylight saving time?

DST affects only the displayed local time, not the underlying Unix timestamp. The same instant — say 14:23 UTC — renders as 9:23 AM EST in winter and 10:23 AM EDT in summer because the local zone shifted, while the timestamp number stays exactly the same.

Is the data sent anywhere?

No. The conversion uses native JavaScript Date math entirely in your browser, so timestamps and dates never leave the device.

Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa online. Free timestamp converter with timezone support and formatting.

Calculators Date & Time

Instant results

Current Unix Timestamp

0

1/1/1970, 12:00:00 AM

Timestamp to Date

Format:

Date to Timestamp

Year

Month

Day

Hour

Minute

Second

Seconds

1778457600

Milliseconds

1778457600000

About Unix Timestamps

A Unix timestamp (also known as Epoch time) is the number of seconds that have elapsed since January 1, 1970 (UTC). It's commonly used in programming to store dates.

Note: JavaScript uses milliseconds, while many systems use seconds. This tool supports both formats.

How to Use Timestamp Converter

Enter timestamp or date

Paste a Unix timestamp in seconds or milliseconds, an ISO 8601 date string, or a human-readable date. The tool detects the format automatically.

View all conversions

The result panel shows Unix in both seconds and milliseconds, ISO 8601, your local time, UTC, and common locale formats side by side.

Switch timezones

Many tools also display the same instant across multiple time zones at once, which makes coordinating across distributed teams much simpler.

Copy your preferred format

Grab whichever rendering matches your destination — code literals, database queries, log entries, or written communication — and paste it in.

When to Use Timestamp Converter

Reading Unix timestamps in logs

Application logs, API responses, and database rows are full of ten-digit numbers like 1710512625, and the human eye cannot make sense of any of them. The converter takes that number and hands you a real date and time so you can actually see when something happened. Engineers debugging incidents lean on this constantly when their tooling does not auto-translate the values for them.

Switching between common date formats

The same instant in time can show up as a Unix timestamp, an ISO 8601 string like 2024-03-15T14:23:45Z, a human phrase like 'March 15, 2024 2:23 PM', or a locale-specific format that varies by country. The tool moves freely between all of these, which matters when you are integrating systems that disagree about how dates should look.

Time zone reconciliation

A meeting at 14:00 UTC lands at 9 AM in New York, 6 AM in San Francisco, and 11 PM in Tokyo. When you need to coordinate across regions or read logs from servers scattered through several data centers, seeing the same moment expressed in multiple time zones at once removes a lot of mental arithmetic.

Sanity checks during development

Whether you are working in JavaScript, Python, or SQL, timestamps appear in slightly different shapes — Date objects, datetime instances, TIMESTAMP columns. Pasting a value into the converter while debugging confirms whether the number you are looking at represents the moment you expected, which is often the fastest way to catch off-by-1000 errors between seconds and milliseconds.

Timestamp Converter Examples

Unix to readable

Input

1710512625

Output

2024-03-15T14:23:45Z (UTC), or 9:23:45 AM EST in local time

This is the workhorse case. A ten-digit Unix timestamp counts seconds since the start of 1970, and the converter does the math instantly while showing both the UTC value and a localized rendering for context.

Milliseconds vs seconds

Input

1710512625123 (thirteen digits)

Output

The same moment as 1710512625, just measured in milliseconds rather than seconds

JavaScript's Date.now() returns milliseconds, which is why a thirteen-digit number lands on the same wall-clock moment as the ten-digit version divided by a thousand. The tool reads the digit count and handles both formats automatically.

Time zone variants

Input

A single UTC moment, displayed across regions

Output

14:23 UTC, 09:23 EST, 06:23 PST, 23:23 Tokyo (and the next calendar day for some moments)

The underlying instant never changes. Only the wall-clock display shifts as you move between regions, which makes the tool useful when one team's afternoon meeting is another team's bedtime.

Tips & Best Practices for Timestamp Converter

1.A ten-digit number is seconds, a thirteen-digit number is milliseconds. Same moment in time, different scale, and the digit count gives it away.
2.Always include a time zone marker on stored timestamps. '2024-03-15 14:23' is ambiguous, but '2024-03-15T14:23:45Z' or '2024-03-15T14:23:45-05:00' are unambiguous.
3.ISO 8601 is the safest choice for storage and APIs because it sorts correctly as plain text and reads the same way in every country.
4.Avoid locale-formatted dates for data exchange. '01/02/2024' means January 2 in the US and February 1 across most of Europe, which is exactly the kind of bug you do not want hiding in your data.
5.Daylight saving time changes the displayed local time but not the Unix timestamp underneath. The same number renders as 8 AM EST in winter and 9 AM EDT in summer, and the tool follows that automatically.
6.In the browser, new Date(timestamp).toString() shows the user's local zone while toISOString() gives you UTC. Most converters expose both so you can copy whichever you need.

Frequently Asked Questions

It is the number of seconds that have elapsed since midnight UTC on January 1, 1970 — the so-called Unix epoch. The format originated at Bell Labs in the late 1960s, and it survives because a single integer can represent any moment in time without locale or language complications.

Timestamp Converter

Timestamp to Date

Date to Timestamp

About Unix Timestamps

How to Use Timestamp Converter

Enter timestamp or date

View all conversions

Switch timezones

Copy your preferred format

When to Use Timestamp Converter

Reading Unix timestamps in logs

Switching between common date formats

Time zone reconciliation

Sanity checks during development

Timestamp Converter Examples

Unix to readable

Milliseconds vs seconds

Time zone variants

Tips & Best Practices for Timestamp Converter

Frequently Asked Questions

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