Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Live epoch clock, multiple output formats, timezone support, and relative time display.

Quick Reference
1 minute60 seconds
1 hour3,600 seconds
1 day86,400 seconds
1 week604,800 seconds
1 month (30d)2,592,000 seconds
1 year (365d)31,536,000 seconds
4.8(70 votes)
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What is Unix Timestamp Converter?

The Unix Timestamp Converter translates between Unix epoch time (the number of seconds since January 1, 1970 00:00:00 UTC) and human-readable date formats in both directions. It features a live epoch clock showing the current timestamp ticking in real-time, auto-detection of input scale (seconds, milliseconds, microseconds, nanoseconds), and outputs in multiple formats: ISO 8601, UTC, RFC 2822, locale-specific, and relative time ('3 hours ago'). Unix timestamps are the universal time representation in computing — used by databases (PostgreSQL, MySQL), APIs (REST, GraphQL), log files, message queues, JWT tokens, and virtually every programming language.

This free epoch converter is used by developers debugging time-related bugs in API responses, database administrators converting stored timestamps for reporting, log analysts correlating events across systems with different time formats, and anyone who encounters a number like 1711234567 and needs to know what date it represents.

How to Use

  1. 1Enter a Unix timestamp to convert it to a human-readable date
  2. 2Or switch to Date → Timestamp mode and enter date/time values
  3. 3Click any output row to copy it to clipboard
  4. 4Change the timezone to see conversions in different regions

Who Uses This

System Administrators

Monitor and troubleshoot infrastructure

Developers

Debug network issues and integrate via API

SEO Specialists

Verify domain configuration and performance

Security Analysts

Audit and assess network security

Frequently Asked Questions

What is a Unix timestamp and why is it used?
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds elapsed since the Unix Epoch — January 1, 1970 00:00:00 UTC. It provides a timezone-independent, language-agnostic way to represent any point in time as a single integer. This simplicity makes it the standard time format in computing: databases store timestamps for records, APIs include them in responses, log files use them for event timing, JWT tokens encode expiration as epoch time, and programming languages provide built-in conversion functions. The current Unix timestamp is always increasing and is the same regardless of timezone.
What is the Year 2038 problem?
The Year 2038 problem (Y2K38) occurs because many older systems store Unix timestamps as a signed 32-bit integer, which has a maximum value of 2,147,483,647 — corresponding to January 19, 2038 at 03:14:07 UTC. After this moment, the integer overflows to a negative number, potentially causing systems to interpret the date as December 13, 1901. Most modern operating systems, databases, and programming languages now use 64-bit timestamps (which won't overflow for 292 billion years), but legacy embedded systems, IoT devices, and old database schemas may still be vulnerable.
What is the difference between seconds, milliseconds, and nanoseconds timestamps?
Timestamps come in different precisions: seconds (10 digits, e.g., 1711234567) — used by most Unix tools, PHP, Python's time.time(), and many APIs. Milliseconds (13 digits, e.g., 1711234567890) — used by JavaScript's Date.now(), Java's System.currentTimeMillis(), and many modern APIs. Microseconds (16 digits) — used by Python's datetime, PostgreSQL, and some high-precision systems. Nanoseconds (19 digits) — used by Go's time.Now().UnixNano() and some performance monitoring tools. This converter auto-detects the scale from the number of digits.
How do I convert a date to Unix timestamp?
Switch to Date to Timestamp mode, enter the date and time values (year, month, day, hour, minute, second), select the appropriate timezone, and the tool instantly calculates the Unix timestamp in seconds, milliseconds, and other formats. You can also get the current timestamp from the live epoch clock displayed at the top of the tool. In code: JavaScript uses Math.floor(Date.now()/1000), Python uses int(time.time()), and PHP uses time().
Why do timestamps look different in different programming languages?
Different languages use different default precisions and formats: JavaScript Date.now() returns milliseconds (13 digits), Python time.time() returns seconds as a float (10 digits + decimals), Java System.currentTimeMillis() returns milliseconds, Go time.Now().Unix() returns seconds but also offers UnixNano() for nanoseconds, and PHP time() returns seconds as an integer. When comparing timestamps across systems, always verify the precision first — a JavaScript millisecond timestamp divided by 1000 equals the equivalent Python seconds timestamp. This tool displays all common formats simultaneously.

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