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Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Runs in your browser.

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Timestamp Converter

Convert between Unix timestamps and human-readable dates. Multiple output formats.

Current Time
Unix
1779016156
ISO 8601
2026-05-17T11:09:16.556Z

How to Use Timestamp Converter

  1. 1

    Enter a timestamp or date

    Type a Unix timestamp (seconds or milliseconds) or a date string like '2024-01-15T12:00:00Z' into the input field.

  2. 2

    Convert

    Click Convert or press Enter to see the result in all supported formats including ISO 8601, RFC 2822, local time, and relative time.

  3. 3

    Use current time

    Click the Use Now button to populate the input with the current Unix timestamp.

  4. 4

    Copy any format

    Click the Copy button next to any output format to copy it to your clipboard.

Frequently Asked Questions

A Unix timestamp is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). It is a widely used standard for representing time in computing.

Yes. The tool automatically detects whether your input is in seconds or milliseconds based on its magnitude, and converts accordingly.

You can enter Unix timestamps (seconds or milliseconds), ISO 8601 strings (2024-01-15T12:00:00Z), or any date string that JavaScript's Date constructor can parse.

The live clock updates every second and reflects your device's system clock. It displays both the Unix timestamp and ISO 8601 format.

Yes. All conversions happen in your browser with no server communication required. The tool works fully offline.

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The Unix Epoch and Why It Matters

Unix timestamps count the seconds since January 1, 1970 00:00:00 UTC — a moment known as the Unix epoch. This arbitrary starting point was chosen by early Unix engineers because it was recent enough to not waste bits on historical dates and far enough back to cover the system's expected lifespan. The value 0 represents the epoch; negative values represent dates before 1970. As of 2026, the current timestamp is around 1.77 billion.

The Year 2038 Problem

Systems that store Unix timestamps as signed 32-bit integers will overflow on January 19, 2038 at 03:14:07 UTC, wrapping around to a date in December 1901. This is the "Y2K38" problem. Modern 64-bit systems are immune (their timestamps will not overflow for 292 billion years), but embedded systems, legacy databases, and IoT devices with 32-bit time fields are at risk. Migration efforts are ongoing, but many affected systems are difficult to update.

Timestamps vs. ISO 8601

Unix timestamps are compact and timezone-agnostic (always UTC), making them ideal for storage and computation. ISO 8601 strings (like 2026-04-10T12:00:00Z) are human-readable and include timezone information, making them better for logging, APIs, and display. Best practice: store timestamps as Unix integers in databases, transmit as ISO 8601 in APIs, and convert to local time only at the presentation layer. This avoids the timezone bugs that plague applications mixing formats.