Unix Timestamp Converter & Viewer

Unix Timestamp Converter & Epoch Time Viewer

Convert Unix timestamps to human-readable dates and dates back to Unix epoch time directly in your browser. This tool supports seconds, milliseconds, and nanosecond timestamps with automatic format detection, and includes a live-updating epoch clock. All conversions run client-side with zero data sent to any server.

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. It is a widely used standard for representing points in time across programming languages, databases, APIs, and operating systems. Unix timestamps are timezone-independent, making them reliable for storing and transmitting temporal data.

How do I convert a Unix timestamp to a date?

Paste your Unix timestamp into the "Timestamp to Date" field on this page. The tool automatically detects whether the value is in seconds, milliseconds, or nanoseconds and displays the corresponding UTC date, your local timezone date, and a relative time string (e.g. "2 years ago"). No manual format selection is needed.

How do I convert a date to a Unix timestamp?

Use the "Date to Unix Timestamp" section to select a date and time using the datetime picker. The tool instantly outputs the equivalent Unix timestamp in seconds. The result can be copied to your clipboard with one click for use in code, APIs, or database queries.

What is the current Unix timestamp?

The live epoch clock at the top of this tool displays the current Unix timestamp in seconds, updating every second. This is useful for quickly referencing the current epoch value when writing time-based logic, debugging API responses, or setting expiration times in JWT tokens.

What is the difference between seconds, milliseconds, and nanoseconds timestamps?

Unix timestamps in seconds contain 10 digits for current dates (e.g. 1700000000). Millisecond timestamps contain 13 digits (e.g. 1700000000000) and are used by JavaScript's Date.now() and many web APIs. Nanosecond timestamps contain 19 digits and appear in systems like Go's time.UnixNano() or database engines. This converter detects the format automatically based on the digit count.

Why do developers use epoch time?

Epoch time provides a language-agnostic, timezone-neutral way to represent moments in time as a single integer. This makes it straightforward to compare, sort, and calculate time differences without parsing date strings or handling timezone offsets. It is the standard in Unix/Linux systems, HTTP headers, database timestamps, and authentication token expiration claims.

How do I get the current Unix timestamp in code?

In JavaScript, use Math.floor(Date.now() / 1000) for seconds or Date.now() for milliseconds. In Python, use import time; int(time.time()). In Go, use time.Now().Unix(). In PHP, use time(). In Bash, use date +%s. Each returns the current epoch time in seconds. This tool provides the same value in real time without writing code.

Is epoch time the same as Unix time?

Yes. The terms "epoch time," "Unix time," "Unix timestamp," and "POSIX time" all refer to the same concept: the number of seconds elapsed since the Unix epoch (January 1, 1970, 00:00:00 UTC). The only variation is the unit: some systems use milliseconds or nanoseconds instead of seconds, which this tool handles automatically.

How do I handle timezone conversions with Unix timestamps?

Unix timestamps are inherently UTC-based and contain no timezone information. To display a timestamp in a specific timezone, convert the UTC value to a localized date using your language's date library. This tool shows both the UTC representation and your browser's local timezone interpretation side by side, so you can compare both at a glance.

Can Unix timestamps be negative?

Yes. Negative Unix timestamps represent dates before the Unix epoch (January 1, 1970). For example, -86400 corresponds to December 31, 1969. This tool supports negative values and correctly converts them to their pre-epoch date equivalents.

What is the Year 2038 problem?

The Year 2038 problem occurs because many systems store Unix timestamps as 32-bit signed integers, which overflow on January 19, 2038, at 03:14:07 UTC (timestamp 2147483647). After this point, the value wraps to a negative number, causing date calculations to fail. Modern systems mitigate this by using 64-bit integers. You can paste 2147483647 into this tool to see the exact overflow date.

Where are Unix timestamps commonly used?

Unix timestamps appear in API responses (REST, GraphQL), database columns (PostgreSQL timestamp, MySQL UNIX_TIMESTAMP()), log files, cron job scheduling, JWT iat and exp claims, HTTP Last-Modified and Expires headers, and Git commit metadata. This converter helps developers quickly interpret these values during debugging and development.