Timestamp Converter
Convert between Unix timestamps, ISO 8601 dates, Windows FILETIME, Excel dates, and JavaScript timestamps instantly.
About Timestamp Converter
Our Timestamp Converter is a powerful tool that allows you to convert timestamps between different formats seamlessly. Whether you're a developer working with APIs, a data scientist analyzing logs, or someone dealing with date/time data across different systems, this tool provides accurate conversions across six commonly used timestamp formats.
The tool supports conversions between Unix Timestamp (seconds), Unix Timestamp (milliseconds), ISO 8601 Date/Time, Windows FILETIME, Excel Date/Time, and JavaScript Date. All conversions are calculated with high precision and displayed instantly as you type or change formats.
Unix timestamps are the standard for web development and APIs, representing the number of seconds since January 1, 1970 (Unix Epoch). ISO 8601 is the international standard for date and time representation. Windows FILETIME is used in Windows operating systems, while Excel dates are common in spreadsheet calculations. JavaScript timestamps track milliseconds for precise timing in web applications.
Convert From
Current Timestamp
How to Use
Enter the Timestamp Value
Type the timestamp value you want to convert. For Unix timestamps, enter a numeric value (e.g., 1704067200). For ISO 8601 dates, use the format YYYY-MM-DDTHH:mm:ssZ (e.g., 2024-01-01T00:00:00Z). The tool accepts various date formats automatically.
Select the Source Format
Choose the format of your input value from the "From Format" dropdown. Options include Unix Timestamp (seconds or milliseconds), ISO 8601 Date/Time, Windows FILETIME, Excel Date/Time, and JavaScript Date.
Select the Target Format
Choose the format you want to convert to from the "To Format" dropdown. You can also use the "Swap Formats" button to quickly switch between the source and target formats.
View Results
Click "Convert" to see the result. The tool will display the converted value, conversion details, and all possible conversions from your original value to every supported timestamp format.
Common Conversions
Quick links to frequently used timestamp conversions. Click any link to see the instant result.
Extended Features
Current Timestamp Display
View the current Unix timestamp, milliseconds, and ISO 8601 date in real-time. Live updates every second to help you track the current time in different formats.
All Format Conversions
When you convert a value, see the equivalent timestamp in all supported formats simultaneously. This comprehensive view helps you understand how the same moment is represented differently across systems.
Quick Format Swapping
Use the swap button to instantly reverse your conversion direction. This is especially useful when you need to convert back and forth between two formats.
Shareable Conversion Links
Each common conversion has its own dedicated URL. You can bookmark or share these links to quickly access specific conversions without re-entering values.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp represents the number of seconds that have elapsed since the Unix Epoch, which is January 1, 1970, 00:00:00 UTC. It's widely used in Unix-like operating systems, programming languages, and web APIs. For example, the Unix timestamp for January 1, 2024, 00:00:00 UTC is 1704067200.
What is the difference between Unix timestamp seconds and milliseconds?
Unix timestamps in seconds represent the number of seconds since the Unix Epoch, while millisecond timestamps represent the same duration in milliseconds (1 second = 1000 milliseconds). JavaScript's Date.getTime() returns milliseconds, which allows for more precise time tracking. To convert seconds to milliseconds, multiply by 1000.
What is ISO 8601 format?
ISO 8601 is an international standard for representing dates and times. The format is YYYY-MM-DDTHH:mm:ssZ, where T separates the date and time, and Z indicates UTC timezone. For example, 2024-01-01T00:00:00Z represents January 1, 2024, at midnight UTC. This format is human-readable and unambiguous.
What is Windows FILETIME?
Windows FILETIME represents the number of 100-nanosecond intervals since January 1, 1601 UTC. It's used in the Windows operating system for file timestamps and system time tracking. The epoch starts at 1601 because it's 400 years before the Windows NT epoch (2001), making it a convenient reference point for Windows calculations.
How does Excel store dates as numbers?
Excel stores dates as serial numbers representing the number of days since January 1, 1900 (with some historical quirks). The serial number 1 represents January 1, 1900. To convert an Excel date to a Unix timestamp, subtract 25569 (the Excel serial for January 1, 1970), then multiply by 86400 (seconds in a day).
When will the Unix timestamp overflow?
The Unix timestamp will overflow on January 19, 2038, at 03:14:07 UTC when using a signed 32-bit integer (the "Year 2038 problem"). At that point, the timestamp will wrap around to a negative value. Modern systems typically use 64-bit integers, which can represent timestamps for billions of years into the future.
What timezone does this converter use?
All conversions use UTC (Coordinated Universal Time) as the standard timezone. Unix timestamps are inherently timezone-agnostic as they count seconds from the Unix Epoch in UTC. ISO 8601 dates are displayed with the Z suffix to indicate UTC. If you need local timezone conversions, adjust the result accordingly.
Is this converter accurate?
Yes, our converter uses standard mathematical formulas and JavaScript's built-in Date object for precise conversions. Results are accurate to the second for Unix timestamps and to the millisecond for JavaScript timestamps. The converter handles leap seconds and calendar transitions correctly.