UNIX Timestamp Converter

Convert between UNIX timestamps and human-readable dates. Live clock with multiple format display.

Processed in your browser. No data is sent to our servers.

How to Convert Timestamps

UNIX timestamps represent the number of seconds (or milliseconds) since January 1, 1970 UTC. Paste a timestamp into the converter to see the corresponding human-readable date in multiple formats: ISO 8601, RFC 2822, and a relative description like two hours ago. Conversely, pick a date and time using the date picker to get the UNIX timestamp. The live clock at the top always shows the current timestamp, updating every second, which is handy for logging and debugging time-sensitive code.

Working with Timestamps in Development

Timestamps appear everywhere in development: API responses, database records, JWT tokens, log files, and cron schedules. Converting them manually is error-prone, especially across time zones. This tool displays the date in your local timezone by default but includes a timezone selector for checking values in UTC or other zones. It auto-detects whether the input is in seconds or milliseconds, and you can toggle between the two. All processing runs in your browser using the JavaScript Date API.

Frequently Asked Questions

Yes. The tool auto-detects whether your input is in seconds or milliseconds. You can also toggle the unit manually.

By default, your browser's local timezone. You can switch to UTC or any other timezone using the dropdown.

JavaScript supports dates from approximately 271,821 BCE to 275,760 CE. Practically, most timestamps you encounter fall between 1970 and 2100.

UNIX timestamps do not account for leap seconds, and neither does the JavaScript Date object. This is standard behavior.

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