Timestamp Converter Online
Convert Unix timestamps to human-readable date & time instantly using Timestamp Converter Online tool. Full timezone support — free, fast & accurate.
Real-Time Clock
100% Free
Timezone Support
Unix ↔ Date
Mobile Friendly
—
Millisecond Timestamp
—
Your UTC Offset
—
Your Timezone
—
DST Active
Converter
World Clock
Conversion History
| Unix Timestamp | Human Readable (UTC) | Direction | |
|---|---|---|---|
| No conversions yet. | |||
Common Timestamp Reference
| Event | Unix Timestamp | Human Date (UTC) |
|---|---|---|
| Unix Epoch Start | 0 | 1970-01-01 00:00:00 |
| Y2K Midnight | 946684800 | 2000-01-01 00:00:00 |
| 1 Billion Seconds | 1000000000 | 2001-09-09 01:46:40 |
| 1.5 Billion Seconds | 1500000000 | 2017-07-14 02:40:00 |
| 2 Billion Seconds | 2000000000 | 2033-05-18 03:33:20 |
| 32-bit Max (Y2K38) | 2147483647 | 2038-01-19 03:14:07 |
User Guide
What is a Unix Timestamp?
A Unix timestamp (also called Epoch time) is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC. It is a standard way computers store and communicate time, used in databases, APIs, logs, and programming languages worldwide.
Unix → Date (Tab 1)
- Paste any Unix timestamp (seconds or milliseconds) in the input box.
- The tool auto-detects whether it's seconds (10 digits) or milliseconds (13 digits).
- Select a display timezone or use your local timezone.
- Results update live as you type.
- Click any result's Copy button to copy the formatted date.
Date → Unix (Tab 2)
- Select a date and time using the date/time pickers.
- Choose the input timezone (Local or UTC).
- The equivalent Unix timestamp (seconds & milliseconds) is shown instantly.
Timezone Converter (Tab 3)
Enter any date/time and convert it between different timezones. Select the source timezone and the target timezone to see the converted time instantly.
Timestamp Difference (Tab 4)
Enter two Unix timestamps or dates to calculate the exact difference in years, months, days, hours, minutes, and seconds. Use the Now button for either field to compare against the current time.
Common Use Cases
- API Debugging: Decode epoch values from JSON responses.
- Log Analysis: Convert server log timestamps to readable dates.
- Database Work: Interpret Unix time stored in database fields.
- Scheduling: Calculate future or past timestamps for cron jobs, events.
- Cross-timezone Meetings: Convert event times across global timezones.
Frequently Asked Questions
What is Unix/Epoch time?
Unix time is the number of seconds since January 1, 1970 00:00:00 UTC (the "Unix epoch"). It's used universally in computing as a timezone-agnostic way to represent a specific point in time.
What's the difference between seconds and milliseconds timestamps?
A Unix timestamp in seconds is typically 10 digits (e.g., 1700000000). In milliseconds it's 13 digits (e.g., 1700000000000). JavaScript's
Date.now() returns milliseconds; most Unix systems use seconds. This tool auto-detects both.What is the Y2K38 problem?
On January 19, 2038, 32-bit signed integers used to store Unix time will overflow (reach 2,147,483,647). Systems still using 32-bit time storage may fail. Modern 64-bit systems can store timestamps billions of years into the future.
Does Unix time account for leap seconds?
No. Unix time ignores leap seconds — it assumes every day has exactly 86,400 seconds. This makes calculations simpler but means Unix time can occasionally differ from UTC by a few seconds.
Can I convert negative timestamps?
Yes! Negative Unix timestamps represent dates before January 1, 1970. For example, -86400 represents December 31, 1969 00:00:00 UTC.
Is my timezone data accurate?
This tool uses your browser's built-in Intl API and the IANA timezone database, which is the same standard used by operating systems worldwide. DST (Daylight Saving Time) transitions are handled automatically.