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Unix Timestamp Converter
Convert any Unix timestamp to a human-readable date and time – or convert a date back to a Unix timestamp – with timezone support and millisecond precision.
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Unix Timestamp Converter – ToolPremier

Convert Unix timestamps to dates · seconds and milliseconds · UTC and local time · live current timestamp

How it works
Convert in three steps

1. Enter a timestamp or date

Paste a Unix timestamp (seconds or milliseconds) to convert it to a readable date, or enter a date and time to get the Unix timestamp equivalent.

2. Set your timezone

Choose a timezone for the human-readable output - or see both UTC and local time simultaneously.

3. Copy the result

Get the converted value in your preferred format - ISO 8601, RFC 2822, or a simple date string - ready to use in your code or logs.

FAQ
Common questions
A Unix timestamp (also called Unix time or POSIX time) is the number of seconds elapsed since January 1, 1970, at 00:00:00 UTC – a moment known as the Unix epoch. It is a universal, timezone-independent way to represent a point in time as a single integer, used in virtually every programming language, database, and operating system.
Standard Unix timestamps count seconds since the epoch. Many modern systems – JavaScript Date.now(), Java System.currentTimeMillis(), and most REST APIs – return milliseconds instead, so the value is 1000 times larger. A 10-digit number is likely seconds; a 13-digit number is almost certainly milliseconds. This converter auto-detects which format you have entered.
The Year 2038 problem affects 32-bit systems that store Unix timestamps as a signed 32-bit integer. The maximum value for a signed 32-bit integer is 2,147,483,647, which corresponds to January 19, 2038. Systems that have not migrated to 64-bit timestamp storage will overflow on that date. Modern 64-bit systems and most current software are not affected.
In JavaScript: Math.floor(Date.now() / 1000) for seconds. In Python: import time; int(time.time()). In PHP: time(). In SQL (MySQL): UNIX_TIMESTAMP(). In Bash: date +%s. All return the current time as a Unix timestamp.
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About the Unix Timestamp Converter
Unix timestamps appear constantly in developer work – in API responses, database records, log files, JWT claims, and cookie expiry values. Reading a raw timestamp number as a number does not tell you much; you need to know if that is in the past, the future, or exactly when. This converter handles the two most common operations: paste a timestamp and get the readable date, or enter a date and get the timestamp integer back. It supports both seconds and milliseconds precision, shows output in multiple formats (UTC, local time, ISO 8601), and auto-detects whether the input is seconds or milliseconds based on the number of digits.
Benefits
  • Bidirectional conversion - timestamp to date and date to timestamp in the same tool.
  • Seconds and milliseconds precision - auto-detects format from input digit count.
  • Timezone-aware output - see UTC and local time simultaneously.
  • Multiple output formats - ISO 8601, RFC 2822, and plain date string options.
Privacy
All conversion runs client-side. No timestamp or date data is transmitted to any server.