Unix Timestamp Converter

How to use the Unix Timestamp Converter

1. •Enter a Unix timestamp in the input field to convert it to a human-readable date and time. The tool accepts both seconds (10-digit) and milliseconds (13-digit) timestamps.
2. •Pick a date and time using the date picker to convert a human-readable date back into a Unix timestamp in both seconds and milliseconds.
3. •View the current timestamp displayed at the top of the tool, updating in real-time so you always know the exact current Unix time.
4. •Copy the result in your preferred format. The tool shows the converted date in your local timezone as well as UTC.

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, at 00:00:00 UTC. This moment is known as the "Unix Epoch." For example, the timestamp 1700000000 represents November 14, 2023, at 22:13:20 UTC.

Unix timestamps were introduced in early Unix systems as a simple, timezone-independent way to represent a point in time as a single integer. Because it is just a number, it avoids the complexity of date formats, time zones, daylight saving time, and locale differences. This makes it the de facto standard for storing and transmitting time data in software.

Most programming languages provide built-in functions to work with Unix timestamps:

• •JavaScript: Date.now() returns milliseconds; Math.floor(Date.now() / 1000) for seconds
• •Python: import time; time.time()
• •PHP: time()
• •SQL: UNIX_TIMESTAMP() in MySQL, EXTRACT(EPOCH FROM NOW()) in PostgreSQL

A well-known limitation is the Year 2038 problem: on systems that store timestamps as 32-bit signed integers, the maximum representable time is January 19, 2038, at 03:14:07 UTC. After that, the integer overflows. Modern 64-bit systems do not have this issue, as a 64-bit timestamp can represent dates billions of years into the future.

Common use cases

• •API development: REST APIs commonly use Unix timestamps in request and response payloads because they are unambiguous and timezone-neutral.
• •Database debugging: When inspecting database records that store created_at or updated_at as integer timestamps, you need to convert them to see the actual date.
• •Log analysis: Server logs and monitoring tools often record events in Unix timestamps for precision; converting them is essential for human interpretation.
• •JWT token inspection: The iat (issued at) and exp (expiration) claims in JWT tokens are Unix timestamps. Converting them helps verify token validity.
• •Scheduling and cron jobs: Calculating future timestamps is useful for scheduling tasks at precise intervals.

FAQ

Q: What is the difference between seconds and milliseconds timestamps? A: A seconds-based timestamp is typically 10 digits (e.g., 1700000000), while milliseconds-based timestamps are 13 digits (e.g., 1700000000000). JavaScript's Date.now() returns milliseconds; most other languages default to seconds.

Q: Does this tool handle dates before 1970? A: Yes. Dates before the Unix Epoch are represented as negative timestamps. For example, December 31, 1969, at 23:59:00 UTC is -60.

Q: Which timezone does the converter use? A: The tool displays results in both your local browser timezone and UTC, so you can easily work with either format.

Is my data safe?

Yes. This tool runs entirely in your browser. Your data is never sent to our servers.