Unix Timestamp Converter — Epoch Time to Human Date and Back
Our free Unix timestamp converter converts between Unix epoch timestamps and human-readable dates in both UTC and local time. The live counter shows the current epoch time updating every second. Convert any past or future timestamp instantly — essential for developers debugging APIs, reading log files, working with databases and understanding time-based tokens like JWTs.
What is a Unix Timestamp (Epoch Time)?
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970 — known as the Unix epoch. It is the universal standard for representing time in software because it is timezone-independent, language-independent, and simple to perform arithmetic on (adding 86400 seconds = adding one day).
Common Unix Timestamp Reference Points
- 0 — 1 January 1970 00:00:00 UTC (the Unix epoch)
- 1000000000 — 9 September 2001 01:46:40 UTC
- 1700000000 — 14 November 2023 22:13:20 UTC
- 2147483647 — 19 January 2038 (the Year 2038 problem — maximum value for 32-bit signed integers)
- 9999999999 — 20 November 2286 (maximum for current 64-bit systems)
The Year 2038 Problem
Many older systems store Unix timestamps as a 32-bit signed integer, which has a maximum value of 2,147,483,647 — corresponding to 19 January 2038 at 03:14:07 UTC. After this point, 32-bit systems will overflow and roll back to 1901. Modern systems use 64-bit timestamps which are safe until the year 292,277,026,596.
Common Uses for Unix Timestamps in IT
- Reading and writing application log files and database records
- Setting expiry times in JWT tokens (
expandiatclaims) - Calculating time differences and durations in code
- Debugging caching headers (
Last-Modified,Expires) - Interpreting SNMP, syslog, and network monitoring timestamps
- Working with REST API responses that return epoch times