Unix Time Converter

    Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, and time zones. Fast, free epoch date time converter.

    Current Unix Time

    Seconds since Jan 01 1970 (UTC)

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    Supports seconds and milliseconds

    How to Use

    Follow these simple steps to get the best results.

    1Convert timestamps to dates: select the 'Unix to Date' tab and drop in your number. Seconds or milliseconds? We detect it automatically.
    2Set your timezone. We've got every global zone ready, so you can see exactly what time it was in London, Tokyo or New York.
    3Format the output. Pick ISO 8601 or local styles, the date updates instantly as you change the timestamp or zone.
    4Convert dates back to Unix: use the 'Date to Unix' tab to get the exact epoch number in both seconds and milliseconds for your API or database.
    5Grab the current time. The ticking clock at the top shows 'right now' in Unix seconds. Just click to copy whenever you need a fresh timestamp.

    Frequently Asked Questions

    Unix time (or Epoch time) is just a way for computers to track time by counting the total seconds since midnight on January 1, 1970. Why 1970? Early Unix engineers just needed a round, convenient starting point. Because it's a single number that keeps growing, computers can sort, compare and calculate time differences with simple math. No timezone confusion or leap year logic required at the storage level.

    It's usually about the length. A 10-digit number (like 1771419980) counts seconds. A 13-digit number (like 1771419980000) counts milliseconds. This is a classic source of bugs: JavaScript's Date.now() gives you milliseconds, but most backend systems (like Python or SQL) expect seconds. This tool automatically detects which one you've pasted and handles the math for you.

    Because humans are messy and computers prefer numbers. A Unix timestamp represents an absolute moment in time that's the same everywhere on Earth. No timezone ambiguity, no weird calendar rules and no parsing errors across different languages. It also makes time math a breeze by calculating an expiration window is just simple subtraction instead of complex date logic.

    Here are a few common ones pro look up: 0 is the start of it all (Jan 1, 1970). 946684800 is Y2K. 1735689600 is the start of 2025. And 2147483647? That's the maximum for 32-bit systems, known as the '2038 problem.' Most modern systems are 64-bit now, so your timestamps won't break for another 292 billion years.

    It's basically the Y2K bug's younger cousin. Older 32-bit systems can only count up to 2,147,483,647 seconds. Once they hit that on January 19, 2038, the clock rolls back to 1901 and breaks everything. If you're using a modern 64-bit system (which most of us have been for a decade), you're totally fine. This is mostly a headache for legacy hardware and old embedded devices.

    If you've ever debugged an authentication error, you've seen these. JWTs use Unix time for things like 'iat' (issued at) and 'exp' (expiration). If an API rejects your token, you can just paste that 'exp' value here to see exactly when it died. It's much faster than trying to guess if your server clock is out of sync or if a token is just stale.

    Every language has its own shortcut. In JavaScript, use new Date(timestamp * 1000). In Python, it's datetime.fromtimestamp(). SQL uses TO_TIMESTAMP() and PHP has date(). If you're building an API, it's best to stick to seconds for consistency. You can always use this tool to double-check that your code is spitting out the right moment in time.

    How It Works

    From Raw Integers to Real Dates: Master the Unix Epoch

    Unix timestamps are everywhere in modern development. Whether you are debugging a login token, checking when a database record was created or trying to figure out why your server logs are a mess, you need a quick way to turn those long numbers into something a human can actually read. Our Unix Time Converter is a free, instant tool that handles conversions in both directions so you can stop doing date math in your head.

    What is Unix Time? (The Simple Explanation)

    Unix time or "Epoch time," is just a way for computers to keep track of a specific moment without getting confused by timezones or leap years. It is a single number representing the total seconds that have passed since midnight on January 1, 1970 (UTC).

    Computers love this because it's much easier to sort or compare a simple integer than a complex string like "Tuesday, March 14th, 2:30 PM." To a machine, time is just a long, growing number. To us, it's a date. This tool bridges that gap.

    The Million-Year Bug: Seconds vs. Milliseconds

    The most common mistake developers make with timestamps is mixing up seconds and milliseconds. If your date looks like it's from the year 55,000, you probably have a millisecond problem.

    • Seconds (10 digits): Used by Linux, Python, PHP and most database engines.
    • Milliseconds (13 digits): The default for JavaScript, Java and many modern APIs.

    Our tool automatically detects which one you are using so you don't have to count the digits yourself.

    Key Dates for Your Reference

    EventUnix Timestamp (Seconds)
    The Beginning (Unix Epoch)0
    Y2K (Jan 1, 2000)946,684,800
    Start of 20241,704,067,200
    Start of 20251,735,689,600
    Start of 20261,767,225,600
    The 2038 Problem2,147,483,647

    Note on 2038: This is the maximum value for a 32-bit signed integer. On January 19, 2038, older systems will "overflow" and roll back to 1901. Most modern systems are already 64-bit and won't have this issue, but it's still a fun piece of trivia to keep in mind.

    Why Developers Use This Every Day

    Debugging JWTs: JSON Web Tokens use timestamps for their "issued at" (iat) and "expiration" (exp) claims. If a user can't log in, the first thing you should do is check that expiration timestamp.

    Database Inspections: Most databases store "created_at" or "updated_at" fields as raw integers to save space. When you are looking at raw data in a SQL client or MongoDB, you need a way to see if that record was created five minutes ago or five years ago.

    Log Analysis: Server logs from Nginx or AWS often record events using Unix time. This tool lets you quickly map an error to a specific time of day so you can correlate it with your deployment or a traffic spike.

    API Responses: Many modern APIs return time as an integer. Whether you are checking a rate limit reset window or a scheduled job's next run, you need to know exactly when that is happening in your local timezone.

    Data Pipeline Debugging: Data engineering pipelines often move time-series data between systems with different conventions. This tool provides a fast visual check to make sure your data isn't getting corrupted during the transfer.

    Timezone Excellence

    A Unix timestamp is technically "timezone-blind": it always represents the exact same moment on Earth regardless of where you are. However, people aren't timezone-blind. We support over 600 different regional timezones, so you can see exactly when an event happened for a user in Tokyo, London or New York without doing any manual offsets.

    Private and Instant

    Just like our other tools, all the logic happens right here in your browser. Your timestamps and dates are never sent to a server. This makes it completely safe for debugging confidential logs, proprietary code or sensitive business data. No accounts, no sign-ups, just fast results.

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