Unix Timestamp Converter

Convert Unix timestamps to readable dates and back instantly. Free epoch time converter supporting seconds, milliseconds, and Linux timestamps.

Unix Time (Seconds)
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Unix Time (Milliseconds)
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ISO Time
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Unix Time to Date Converter

Convert epoch timestamps (10 or 13 digits) to human-readable dates

Enter a 10-digit (seconds) or 13-digit (milliseconds) Unix timestamp

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Current Local Time
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What is a Unix Timestamp?

A Unix timestamp (also known as epoch time or POSIX time) is a system for tracking time as the number of seconds that have elapsed since the Unix epoch: January 1, 1970, at 00:00:00 UTC. This standardized time format is used across operating systems, programming languages, databases, and web APIs.

Unix timestamps are stored as integers, making them easy to compare, sort, and perform calculations with. They eliminate timezone ambiguity since they always represent UTC time, making them perfect for distributed systems and global applications.

Unix Timestamp Formats

Seconds (10 digits)

Example: 1735329600 - Standard Unix timestamp format, most commonly used in Linux systems, PHP, Python, and databases.

Milliseconds (13 digits)

Example: 1735329600000 - Used in JavaScript, Java, and systems requiring millisecond precision.

How to Convert Unix Time to Date

Converting epoch timestamps to readable dates is simple with our Unix time converter:

  1. 1Select "Unix → Date" mode (enabled by default)
  2. 2Paste or type your Unix timestamp (works with 10-digit seconds or 13-digit milliseconds)
  3. 3The converter automatically detects the format and displays the readable date in your local timezone
  4. 4Use the copy buttons to grab the result in your preferred format

Converting Dates to Unix Timestamps

To convert a date to Unix time, switch to "Date → Unix" mode and enter your date. Supported formats include ISO 8601 (2025-12-27T15:30:00Z), common formats like "2025-12-27 15:30:00", or natural language dates. You'll instantly get both seconds and milliseconds timestamps.

Common Use Cases for Unix Timestamp Conversion

🐧 Linux System Administration

Convert Linux file timestamps, log entries, and cron job schedules. Essential for debugging system events and analyzing server logs.

💾 Database Management

Query and update timestamp fields in MySQL, PostgreSQL, MongoDB, and other databases that store dates as Unix time.

🔌 API Development & Testing

Decode epoch timestamps in API responses, verify JWT token expiration times, and test time-based authentication flows.

📊 Data Analysis

Convert epoch milliseconds to dates for data visualization, analytics reports, and time-series analysis in tools like Excel or Python.

Frequently Asked Questions

What is a Unix timestamp?
A Unix timestamp (also called epoch time or POSIX time) represents the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It's widely used in programming, databases, APIs, and system logs for consistent time representation across different time zones.
How do I convert Unix timestamp to date?
Enter your Unix timestamp (in seconds or milliseconds) into the converter above. The tool automatically detects whether you're using 10-digit seconds or 13-digit milliseconds and converts it to a human-readable date in your local timezone.
What's the difference between Unix timestamp in seconds vs milliseconds?
Unix timestamps in seconds have 10 digits (e.g., 1735329600) and count seconds since 1970. Timestamps in milliseconds have 13 digits (e.g., 1735329600000) and are commonly used in JavaScript, Java, and some databases for more precise time tracking.
How do I convert epoch milliseconds to date?
Simply paste your 13-digit epoch milliseconds timestamp into the Unix timestamp field. This tool automatically recognizes milliseconds format and converts it to a readable date format with full precision.
Can I convert dates to Unix timestamps?
Yes! Switch to "Date → Unix" mode using the toggle button. Enter any date in formats like "2025-12-27 15:30:00" or "2025-12-27T15:30:00Z" and get both seconds and milliseconds Unix timestamps instantly.
Does this work for Linux timestamp conversion?
Absolutely. Linux systems use Unix timestamps (epoch time) for file timestamps, log entries, and system events. This converter handles all standard Unix/Linux timestamp formats used across POSIX-compliant systems.
Is this Unix time converter private and secure?
Yes, completely private. All conversions happen locally in your browser - no data is sent to any server. Your timestamps and dates never leave your device.
What date formats can I convert to Unix time?
The converter supports ISO 8601 format (2025-12-27T15:30:00Z), common formats like "2025-12-27 15:30:00", "Dec 27, 2025", and most JavaScript-parseable date strings. For best results, use ISO 8601 format.

Why Use This Unix Timestamp Converter?

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Instant Conversion

Real-time conversion as you type with auto-convert mode enabled

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100% Private

All conversions happen in your browser - no data sent to servers

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Mobile Optimized

Works perfectly on phones, tablets, and desktops

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Smart Detection

Automatically detects seconds vs milliseconds format

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Easy Copy

One-click copy buttons for all output formats

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No Sign-Up

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