Timestamp Converter
Convert Unix timestamps, dates, and timezones — with a live real-time clock
Live Current Time
Unix Timestamp to Human Date
What is Timestamp Converter?
A Unix timestamp (also called POSIX time or Epoch time) is a system for tracking time as the number of seconds elapsed since midnight UTC on 1 January 1970 — the "Unix Epoch." It is the standard way computers store and compare timestamps because it is a single integer that is timezone-independent, language-independent, and easy to compare and calculate with.
Unix timestamps are everywhere in computing: database records, API responses, log files, cookies, JWT tokens, file modification dates, and network protocols all use Unix timestamps internally. When you see a value like 1735689600 in a JSON response or a database record, that is a Unix timestamp representing a specific moment in time.
Altairys's Timestamp Converter works in both directions: paste a Unix timestamp and get a human-readable date/time in any timezone, or enter a date and time and get the corresponding Unix timestamp. It handles both seconds (10-digit) and milliseconds (13-digit) Unix timestamps automatically, and supports timezone conversion so you can see the equivalent time in any of the world's time zones. It also shows the relative time ("3 hours ago," "in 2 days").
How to Use Timestamp Converter
- Get current timestamp
The current Unix timestamp is displayed and updates every second automatically.
- Enter a timestamp
Paste any Unix timestamp (seconds or milliseconds) to convert it to a readable date.
- Select timezone
Choose any timezone to see the date/time in that region.
- Convert date to timestamp
Enter a date and time to get its Unix timestamp in seconds and milliseconds.
Key Benefits
Convert from Unix timestamp to date OR from date to Unix timestamp.
Convert to any timezone in the world — over 400 timezone options.
Shows the current Unix timestamp in real time, updating every second.
Shows "3 hours ago" or "in 2 days" alongside the absolute date/time.
Frequently Asked Questions
A Unix timestamp is the number of seconds elapsed since midnight UTC on January 1, 1970 (the Unix Epoch). For example, 2026-01-01 00:00:00 UTC is timestamp 1767225600. It is the universal standard for storing time in computers.
10-digit timestamps are in seconds (e.g., 1735689600). 13-digit timestamps are in milliseconds (e.g., 1735689600000). JavaScript's Date.now() returns milliseconds; most Unix/Linux tools use seconds.
The Unix Epoch is midnight UTC on January 1, 1970. All Unix timestamps are measured as seconds (or milliseconds) from this moment. The choice of 1970 was arbitrary — it was chosen as the start of the modern computing era.
On January 19, 2038, 32-bit signed Unix timestamps will overflow, rolling over to a negative number representing 1901. This is the "Y2K38" problem. 64-bit timestamps (used by modern systems) push this limit to year 292,277,026,596.
Related Tools
Common Timestamp Examples
| Event | Unix Timestamp | Human Date |
|---|---|---|
| Unix Epoch Start | Jan 1, 1970 00:00:00 UTC | |
| Y2K (Jan 1, 2000) | Jan 1, 2000 00:00:00 UTC | |
| September 11 (9/11) | Sep 11, 2001 08:46:00 UTC | |
| iPhone Launch | Jan 9, 2007 00:00:00 UTC | |
| Bitcoin Genesis Block | Jan 3, 2009 18:15:05 UTC | |
| Unix Billion Seconds | Sep 9, 2001 01:46:40 UTC | |
| Year 2020 Start | Jan 1, 2020 00:00:00 UTC | |
| Year 2025 Start | Jan 1, 2025 00:00:00 UTC | |
| Year 2030 Start | Jan 1, 2030 00:00:00 UTC | |
| Year 2038 Problem (Y2K38) | Jan 19, 2038 03:14:07 UTC | |
| Year 3000 Start | Jan 1, 3000 00:00:00 UTC | |
| Max JS Date | Sep 13, 275760 00:00:00 UTC |