About the Unix Timestamp Converter
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. This free tool lets you instantly convert between Unix timestamps and human-readable dates, with full timezone and ISO 8601 support.
Features
- Live Current Timestamp — See the current Unix timestamp updating in real time, in seconds or milliseconds
- Timestamp to Date — Convert any Unix epoch value to a formatted date with timezone selection
- Date to Timestamp — Pick a date and time to get the corresponding Unix timestamp
- ISO 8601 Conversion — Parse ISO 8601 strings into timestamps and human-readable formats
- Relative Time — See how long ago or how far in the future a timestamp is ("3 hours ago", "in 2 days")
- Timezone Support — Convert across all major timezones worldwide
- Seconds & Milliseconds — Toggle between second and millisecond precision
- Quick Reference — Common timestamps for start of today, this week, this month, and this year
- Copy to Clipboard — One-click copy for any converted value
How to Use
- Enter a Unix timestamp (seconds or milliseconds) to convert it to a human-readable date
- Or pick a date and time to get the corresponding Unix timestamp
- Paste an ISO 8601 string to convert it to a timestamp and other formats
- Use the timezone selector to convert between different time zones
- Click any Copy button to copy a value to your clipboard
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds since the Unix epoch (January 1, 1970 00:00:00 UTC). It is a widely used format for representing dates in programming, databases, and APIs because it is timezone-independent and easy to do arithmetic with.
How do I tell if a timestamp is in seconds or milliseconds?
Timestamps in seconds are typically 10 digits long (e.g., 1700000000), while millisecond timestamps are 13 digits (e.g., 1700000000000). This tool auto-detects the format, but you can also toggle between seconds and milliseconds manually.
Is my data safe?
Yes. All conversions happen entirely in your browser. No data is sent to any server.
What is ISO 8601?
ISO 8601 is an international standard for date and time representation. Examples include "2024-11-14T22:13:20Z" (UTC) and "2024-11-14T22:13:20+09:00" (with timezone offset). It is the most common format used in APIs and data interchange.