Timestamp Converter - Unix Timestamp Tool

All conversion happens in your browser. No data is sent to our servers.

APIs and logs often use Unix timestamps (seconds or milliseconds), which are hard to interpret quickly when debugging incidents or validating time - based data.

Convert Unix timestamps to human - readable dates and vice versa. Support for seconds and milliseconds.

Show detailed guide & explanations

Why you may need this tool

Timestamps in logs and APIs are often numeric Unix values (seconds or milliseconds). Misreading the unit can shift the interpreted time by decades, making debugging confusing—especially for expiration, scheduling, and token claims. A converter helps you translate between numeric timestamps and readable date/time so you can reason about events, deadlines, and validity windows more accurately.

How to use

Paste a timestamp or a date/time, choose the correct unit, and verify the converted output (UTC vs local time).

  1. Enter a Unix timestamp or select a date/time
  2. Choose seconds or milliseconds format
  3. View the converted result instantly
  4. Copy the output in your preferred format

Examples

Understanding log timestamps during incident review
Numeric timestamps are hard to compare with human timelines. Converting them helps you align events with reports, monitoring alerts, and user actions.
Generating timestamps for API queries and tests
APIs often accept a timestamp for filtering events after a certain time. Converting a chosen date into a timestamp makes test setup clearer and more repeatable.

Benefits & differentiators

Fast conversions speed up log analysis and incident review. They also help when you need to generate timestamps for API filters and reproducible tests. By making time values readable, you reduce errors in reasoning about expiry, scheduling, and time - based business logic across environments.

Who this is for

Recommended if you: - analyze logs containing Unix timestamps - debug token claims such as exp/iat/nbf - generate time - based filters for API testing - want to avoid seconds vs milliseconds confusion

FAQ

What is a Unix timestamp?
A Unix timestamp (epoch time) is the number of seconds that have elapsed since January 1, 1970 (UTC). It's a universal way to represent time in computing.
What's the difference between seconds and milliseconds?
Standard Unix timestamps use seconds (10 digits like 1704067200). JavaScript and some APIs use milliseconds (13 digits like 1704067200000).
Is the conversion accurate?
Yes, our converter handles timezone conversions accurately. You can view results in UTC or your local timezone.
Is my data private?
Yes. All conversion happens locally in your browser. No data is sent to our servers.
Can I convert dates to timestamps?
Yes, you can enter a human - readable date and get the corresponding Unix timestamp in both seconds and milliseconds.

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