Unix Timestamp Converter

Convert epoch/Unix timestamps to dates and dates back to timestamps — instantly in your browser.

Current Unix Time (seconds):

Timestamp → Date

Date → Timestamp

About Unix Timestamp Converter

The Unix Timestamp Converter is a free online tool that lets you instantly convert between Unix timestamps (epoch time) and human-readable dates. Whether you're debugging API responses, analyzing log files, or working with database timestamps, this tool handles all conversions in your browser — no data is ever sent to a server.

Supports both seconds and milliseconds precision, multiple timezone outputs, and live "current time" display so you always have a reference point.

How to Use Unix Timestamp Converter

  1. Timestamp → Date: Paste a Unix timestamp (e.g. 1700000000) into the top field and click Convert to Date. The tool auto-detects seconds vs milliseconds.
  2. Date → Timestamp: Enter a date and time in the bottom section and click Convert to Timestamp to get both the seconds and milliseconds epoch values.
  3. Current Time: Click Use Now in either section to prefill the current moment.
  4. Copy Results: Use the copy buttons next to any result to copy values to your clipboard instantly.

Frequently Asked Questions

  • Q: What is a Unix timestamp?

    A: A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It is a universal, timezone-independent way to represent a specific moment in time, widely used in programming, databases, and APIs.

  • Q: How do I tell if a timestamp is in seconds or milliseconds?

    A: Timestamps in seconds are typically 10 digits (e.g. 1700000000), while millisecond timestamps are 13 digits (e.g. 1700000000000). This tool auto-detects which unit you've entered.

  • Q: Does the converter handle negative timestamps?

    A: Yes. Negative Unix timestamps represent dates before January 1, 1970, such as historical dates in the 1960s or earlier.

  • Q: What timezone does the output use?

    A: Results are shown in both UTC and your local browser timezone simultaneously, so you can compare both at a glance.

  • Q: Is the Year 2038 problem real?

    A: Yes, for 32-bit signed integers storing Unix timestamps. On January 19, 2038, such integers overflow. Modern systems using 64-bit integers won't experience this issue, and this tool uses JavaScript's 64-bit numbers, so dates far into the future are fully supported.

  • Q: Is my data private?

    A: Completely. All conversions happen in your browser using JavaScript. No timestamp or date data is ever sent to a server.