Timestamp Converter
Convert Unix timestamps to human-readable dates and dates to timestamps. Supports seconds and milliseconds formats.
Our free Timestamp Converter translates Unix timestamps into human-readable dates and converts dates back to Unix timestamps. Unix timestamps count the number of seconds (or milliseconds) since the Unix epoch — January 1, 1970, 00:00:00… Paste or type your input above; results update immediately. The tool runs in your browser and we don't store your data.
About This Calculator
Our free Timestamp Converter translates Unix timestamps into human-readable dates and converts dates back to Unix timestamps. Unix timestamps count the number of seconds (or milliseconds) since the Unix epoch — January 1, 1970, 00:00:00 UTC — and are the standard way computers store and transmit time. Developers encounter them in API responses, database records, log files, JWT tokens, and cron schedules. This tool decodes any timestamp instantly and also lets you pick a date to generate the corresponding timestamp. It supports both seconds-based (10-digit) and milliseconds-based (13-digit) formats used by different languages and systems.
How It Works
Enter a Unix timestamp (e.g., 1700000000) and the converter displays the corresponding date and time in your local timezone and in UTC. It auto-detects whether the input is in seconds (10 digits) or milliseconds (13 digits). Alternatively, pick a date and time from the date picker and the tool outputs the Unix timestamp in both formats. The current timestamp is also displayed and updates in real time so you can grab a "now" value for testing or logging.
How to Use
- Enter your values in the calculator fields above
- Click the calculate button or let the calculator auto-update
- Review your results instantly
- Adjust values as needed to see different scenarios
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It provides a single integer that represents a specific moment in time, independent of timezone. For example, timestamp 1700000000 corresponds to November 14, 2023.
What is the difference between seconds and milliseconds timestamps?
Seconds-based timestamps are 10 digits (e.g., 1700000000) and are used by Unix/Linux, PHP, Python (time.time()), and most databases. Milliseconds-based timestamps are 13 digits (e.g., 1700000000000) and are used by JavaScript (Date.now()), Java (System.currentTimeMillis()), and some APIs. This tool auto-detects which format you entered.
What timezone are Unix timestamps in?
Unix timestamps are always UTC. They represent an absolute moment in time regardless of timezone. When the converter shows a local time, it applies your browser's timezone offset. If you need a specific timezone, convert the UTC output accordingly.
What is the Year 2038 problem?
Systems that store timestamps as 32-bit signed integers will overflow on January 19, 2038 (timestamp 2,147,483,647). After that, the timestamp wraps to a negative number, causing date errors. Modern systems use 64-bit integers, which extend the range to billions of years. Most software has already been updated, but legacy embedded systems may still be affected.
How do I get the current Unix timestamp in code?
JavaScript: Date.now() (milliseconds) or Math.floor(Date.now()/1000) (seconds). Python: import time; time.time(). PHP: time(). Ruby: Time.now.to_i. Bash: date +%s. This converter also shows the live current timestamp on the page for quick reference.
Is my data private?
Yes. All conversions run in your browser. No timestamps or dates are sent to any server.
Why Use Our Free Timestamp Converter Online?
Our Timestamp Converter runs in the browser so you can format, convert, or generate without sending data to our servers. No account needed—paste or type, get your result. We offer more dev tools (JSON, Base64, JWT, UUID, timestamps, and more) in the list below.