Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa

Supports Unix timestamps (seconds or milliseconds) or ISO date strings.

💡 How It Works

  • Timestamp (seconds): 10-digit number (e.g., 1717020800)
  • Timestamp (milliseconds): 13-digit number (e.g., 1717020800000)
  • Date format: YYYY-MM-DD HH:MM:SS or ISO 8601
  • Automatic detection of input type

How to Use

1

Enter Value

Paste a timestamp or date string

2

Get Results

See timestamp, local time, and UTC instantly

3

Copy

Copy the timestamp with one click

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How to Use the Timestamp Converter

  1. Step 1: Enter a Unix timestamp (a 10-digit number for seconds or a 13-digit number for milliseconds) or a human-readable date string such as "2024-05-30 12:00:00" into the input field.
  2. Step 2: The tool automatically detects the input format and performs the conversion in real time. You do not need to click any button — results appear instantly as you type.
  3. Step 3: Read the three outputs: the Unix timestamp (in milliseconds), your local date and time, and the UTC date and time. Use the copy button next to the timestamp to copy it to your clipboard.
  4. Step 4: For reverse conversion, simply type a date string in ISO 8601 format or the standard "YYYY-MM-DD HH:MM:SS" format, and the corresponding Unix timestamp is displayed immediately.

Tips for Best Results

  • Unix timestamps are always in UTC. The converter displays both local time and UTC so you can verify the offset is applied correctly for your timezone.
  • When working with APIs, pay close attention to whether the timestamp is in seconds (10 digits) or milliseconds (13 digits). Using the wrong precision is a common source of bugs.
  • ISO 8601 date strings such as "2024-05-30T12:00:00Z" are fully supported and are the most reliable format for cross-system date interchange.
  • Bookmark this tool for quick access during debugging sessions — converting timestamps from database logs or API responses is a daily task for many developers.

Frequently Asked Questions

Q1: Why do I see two different numbers for seconds and milliseconds?

Unix timestamps are commonly expressed in two precisions: seconds (10 digits) and milliseconds (13 digits). Many APIs and databases use seconds, while JavaScript's Date.getTime() and some modern systems use milliseconds.

Q2: What happens if I enter an invalid date or timestamp?

The converter silently ignores invalid inputs and hides the results box. If you see no output, double-check your input format — ensure the date string is properly formatted or the timestamp contains only digits.

Q3: Does the timestamp converter work offline?

Yes. The conversion is performed entirely in your browser using JavaScript's built-in Date object. Once the page is loaded, no network requests are made, and your data never leaves your device.