Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
No data is sent to any server — everything runs client-side
Current Unix Timestamp
1775232897
2026-04-03T16:14:57.699Z
Unix Timestamp
Seconds or milliseconds since epoch
Auto-detects seconds vs milliseconds (threshold: 10 digits)
What Is a Unix Timestamp?
A Unix timestamp (also known as Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC — a date known as the Unix Epoch. It's the standard way to represent time in computing because it's timezone-independent, language-agnostic, and trivially comparable (just compare two integers).
Most programming languages and databases use Unix timestamps internally. JavaScript's Date.now() returns milliseconds since epoch. Python's time.time() returns seconds. MySQL's UNIX_TIMESTAMP() function returns seconds.
Notable Timestamps
| Timestamp | Date | Event |
|---|---|---|
| 0 | Jan 1, 1970 00:00:00 UTC | Unix Epoch |
| 1000000000 | Sep 9, 2001 01:46:40 UTC | Billennium |
| 2147483647 | Jan 19, 2038 03:14:07 UTC | Y2K38 (32-bit overflow) |
| -1 | Dec 31, 1969 23:59:59 UTC | One second before epoch |
The Year 2038 Problem
Systems that store timestamps as 32-bit signed integers will overflow on January 19, 2038 at 03:14:07 UTC. After this moment, the timestamp wraps to a large negative number, interpreted as December 13, 1901. This is analogous to the Y2K bug. Modern 64-bit systems handle timestamps until approximately 292 billion years in the future.
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How to Use the Unix Timestamp Converter
Choose a conversion direction
Select "Timestamp → Date" to convert a Unix timestamp to a human-readable date, or "Date → Timestamp" to convert a date string to a Unix timestamp.
Enter the timestamp or date
For timestamp conversion: enter a numeric Unix timestamp (seconds or milliseconds — auto-detected). For date conversion: enter an ISO 8601 date, a date string like "Jan 1 2024", or a full datetime.
Click Convert
The result shows several date formats: ISO 8601, UTC string, local time, Unix seconds, Unix milliseconds, and day of week.
Copy any format
Hover over any result row and click Copy to copy that specific format to your clipboard.
Frequently Asked Questions
How do I know if my timestamp is in seconds or milliseconds?▼
Unix timestamps in seconds are 10 digits (e.g., 1700000000). Millisecond timestamps are 13 digits (e.g., 1700000000000). This tool automatically detects the unit: values greater than 10^12 are treated as milliseconds, others as seconds.
What is the Unix Epoch?▼
The Unix Epoch is January 1, 1970 at 00:00:00 UTC. Unix timestamps count seconds elapsed since this moment. Negative timestamps represent dates before 1970.
What is the Year 2038 problem?▼
Systems storing timestamps as 32-bit signed integers will overflow on January 19, 2038 at 03:14:07 UTC (timestamp 2147483647). After this, the value wraps to a large negative number. Modern 64-bit systems are not affected.
How do I get the current Unix timestamp in JavaScript?▼
Use Date.now() for milliseconds or Math.floor(Date.now() / 1000) for seconds. The tool's "Current Time" display shows the live timestamp updating every second.
How do I convert a Unix timestamp in Python?▼
Use datetime.fromtimestamp(ts) for local time or datetime.utcfromtimestamp(ts) for UTC. For the reverse, use int(datetime.now().timestamp()).
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