Unix Timestamp Generator & Converter

Instantly generate the current Unix timestamp, convert any date and time to epoch seconds, and translate timestamps back to readable formats. Essential for developers, database admins, and anyone working with APIs, log files, or scheduled tasks. Handle timezones, milliseconds, and more—all online, lightning fast.

What is a Unix Timestamp?
A Unix timestamp (or epoch time) is the number of seconds that have elapsed since January 1, 1970 (UTC). It’s the global standard for representing a point in time in programming, databases, APIs, and logging systems.
A developer working with code and abstract time data, illustrating timestamp generation and conversion

Unix Timestamp Generator & Converter Tool

Refreshes every second. Output is in UTC.
Instructions: Use the tabs above to generate the current Unix timestamp, convert any date/time to epoch seconds, or translate a timestamp back to a readable date. All conversions are done in your browser for privacy and speed.

Mastering Unix Timestamps: Formats, Conversion, and Best Practices

What is a Unix Timestamp?

A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC—known as the Unix Epoch. This simple number format allows computers, databases, and APIs to store and compare dates and times without worrying about timezones or formatting. Timestamps are essential for storing logs, scheduling tasks, tracking events, and synchronizing data across different platforms.

How Timestamps are Used in Programming

  • APIs & Databases: Store times as integers for fast sorting, filtering, and timezone-independent comparison.
  • Logging & Events: Track when actions occurred, down to the second (or millisecond) for precise auditing.
  • Scheduling: Trigger code or notifications at exact times, regardless of timezones or daylight saving changes.
  • Data Sync: Synchronize records across servers by comparing timestamps.
  • Security: Validate time-based one-time passwords (TOTPs) and token expirations.

Common Timestamp Formats

  • Unix Timestamp (Seconds): 1717000000 — Number of seconds since 1970-01-01 00:00:00 UTC.
  • Unix Timestamp (Milliseconds): 1717000000000 — Number of milliseconds since Epoch (JavaScript Date, some APIs).
  • ISO 8601: 2025-05-29T14:13:20Z — International standard for date/time strings (used in JSON, XML, HTTP headers).
  • RFC 3339: 2025-05-29T14:13:20+00:00 — Subset of ISO 8601, often used in web APIs and logs.
Convert between formats with code:
PHP:
$timestamp = time();
$iso = date('c', $timestamp);
Python:
import time, datetime
timestamp = int(time.time())
iso = datetime.datetime.utcfromtimestamp(timestamp).isoformat() + 'Z'
JavaScript:
const now = Date.now(); // ms
const ts = Math.floor(now / 1000);
const iso = new Date(now).toISOString();

Converting Between Timezones and Formats

Unix timestamps always represent time in UTC (Coordinated Universal Time). To display times in your local timezone, convert the timestamp using your programming language’s date/time functions. Use caution around Daylight Saving Time changes, as some local times may be ambiguous or non-existent.

Example: Convert timestamp to local time (JavaScript):
let ts = 1717000000;
let local = new Date(ts * 1000).toLocaleString();

Best Practices: Storing and Handling Timestamps

  • Always store timestamps as UTC in databases; convert to local time only when displaying to users.
  • Avoid storing formatted date strings; use integers for precision and easy comparison.
  • Be aware of leap seconds; most systems ignore them, but some time-sensitive applications require special handling.
  • Document the format and timezone of all stored timestamps for future maintainers!

Timestamp Quick Reference Table

Human Date (UTC) Unix Timestamp
(Seconds)		 Unix Timestamp
(Milliseconds)		 ISO 8601
2025-01-01 00:00:00 1735689600 1735689600000 2025-01-01T00:00:00Z
2025-06-01 12:00:00 1749086400 1749086400000 2025-06-01T12:00:00Z
1970-01-01 00:00:00 0 0 1970-01-01T00:00:00Z
2000-02-29 16:45:30 951930330 951930330000 2000-02-29T16:45:30Z
2038-01-19 03:14:07 2147483647 2147483647000 2038-01-19T03:14:07Z
Tip: Convert custom dates above to see results in all formats. The 2038-01-19 row marks the classic 'Year 2038 problem' for 32-bit systems!

Related Tools & Further Reading

Date/Time Converter

Convert any date/time to other formats or timezones, including Unix epoch.
UUID Generator

Create strong, unique IDs for records and objects. Great for logging and APIs.
Base64 Encoder/Decoder

Convert data to Base64—perfect for APIs, storage, and web development.
Timezone Converter

Handle timezones and daylight saving with ease. (Coming soon)
Epoch Converter

Switch between Unix time, milliseconds, and formatted dates. (Coming soon)

Frequently Asked Questions (FAQ)

Unix timestamps are simple integers that make it easy to store, compare, and calculate dates/times without worrying about timezones or formatting quirks. They're supported natively in almost every programming language and database. By storing time as seconds since Epoch, you avoid issues with locale differences, ambiguous string formats, and sorting errors. Only convert to a human-readable string when displaying to users.

PHP: time(); returns the current Unix timestamp (seconds).
Python: import time; time.time() returns seconds since Epoch (as float; use int() for integer seconds).
JavaScript: Math.floor(Date.now() / 1000); gives current seconds; Date.now() alone returns milliseconds.

All Unix timestamps represent seconds since the Epoch in UTC. They are not affected by local time or daylight saving. If you want to display a timestamp in your local timezone, you must convert it using your programming language's date/time functions.

Use your programming language’s date/time constructor and formatting functions. For example:
JavaScript: new Date(ts * 1000).toLocaleString()
PHP: date('Y-m-d H:i:s', $ts)
Python: datetime.datetime.utcfromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S')

Seconds timestamps (e.g. 1717000000) are the most common and default for Unix systems. Milliseconds timestamps (e.g. 1717000000000) are used by JavaScript and some APIs for higher precision. To convert seconds to milliseconds, multiply by 1000. To convert milliseconds to seconds, divide by 1000 (and round/floor as needed).

Summary: Fast, Reliable Unix Timestamp Generator Online

Whether you’re debugging APIs, working with databases, or scheduling automated tasks, our Unix Timestamp Generator & Converter gives you instant, accurate results in every format. Explore related tools above for more date/time utilities, unique ID generation, and format conversions—optimized for developers, analysts, and anyone who needs to work with time data the right way.