Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates instantly. Features a live current timestamp with copy button and dual local/UTC time display.
Unix Timestamp Converter
Convert Epoch to human-readable dates and back.
All processing happens locally in your browser — nothing is stored or sent to any server.
How to Use the Unix Timestamp Converter
- View the live current timestamp that counts up every second.
- Click the Copy button to copy the current epoch timestamp to your clipboard.
- Paste any Unix timestamp into the input field to convert it to local and UTC dates.
- Click Current to populate the field with the live timestamp.
About Unix Timestamps
Unix time (also called POSIX time or epoch time) counts the number of seconds since January 1, 1970 at 00:00:00 UTC. It is the universal time standard for computing — used in every major programming language, operating system, database, and API.
The key advantage of Unix timestamps over human-readable date strings is that they are timezone-independent and unambiguous. "2026-05-04 14:00" could mean any timezone, but 1746360000 means exactly one specific moment in time, everywhere in the world. This makes timestamps the right format for storing, comparing, and transmitting time data between systems.
This converter handles both seconds (10-digit) and milliseconds (13-digit) formats automatically. It displays the result in both your local timezone and UTC for easy comparison. Everything runs locally in your browser — no data is sent anywhere.
Frequently Asked Questions
What is Unix epoch time? ▼
Unix epoch time (or Unix timestamp) is the number of seconds elapsed since January 1, 1970 00:00:00 UTC, known as the Unix epoch. It is the standard time representation in most programming languages, databases, and APIs.
How do I know if a timestamp is in seconds or milliseconds? ▼
Count the digits. A 10-digit number (e.g., 1746364800) is in seconds and represents a date in the 2020s. A 13-digit number (e.g., 1746364800000) is milliseconds — multiply seconds by 1,000 to convert. This converter detects the format automatically.
Why do Unix timestamps start in 1970? ▼
1970 was chosen as a convenient round-number reference point when Unix was developed in the early 1970s at Bell Labs. It was close to the current date at the time, kept initial values small, and was technically simple to implement.
What is the Year 2038 problem? ▼
Systems that store Unix timestamps as a 32-bit signed integer will overflow on January 19, 2038 at 03:14:07 UTC — because 2^31 seconds after the epoch is that exact moment. After that point, the counter wraps around to negative values, potentially causing crashes. Modern systems use 64-bit integers, which extend the epoch far beyond any practical concern.
How do I get the current Unix timestamp in JavaScript? ▼
Use Date.now() for milliseconds (13 digits), or Math.floor(Date.now() / 1000) for seconds (10 digits). In Node.js, process.hrtime.bigint() gives nanoseconds for high-precision timing.
How do I convert a Unix timestamp in Python? ▼
Use datetime.fromtimestamp(ts) for local time or datetime.utcfromtimestamp(ts) for UTC (both in the datetime module). For the reverse: datetime_object.timestamp() returns a float in seconds.
What is the maximum Unix timestamp for 32-bit systems? ▼
2,147,483,647 (2^31 - 1), which corresponds to 03:14:07 UTC on January 19, 2038. This is the Year 2038 problem. 64-bit systems can represent timestamps billions of years into the future.