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Browser-based tool

Timestamp Converter

Convert between UNIX timestamps, ISO 8601, and human-readable dates.

Input Timestamp or Date

Timestamp Date/Time

10-digit (seconds) 13-digit (milliseconds) ISO 8601

Converted Results Ready

UNIX Timestamp (seconds)

UNIX Timestamp (milliseconds)

ISO 8601 (UTC)

Local Time

UTC Time

Relative Time

Tip: Input can be seconds, milliseconds, or any valid date string. The tool auto-detects the format.

Does this handle timezones?

Yes, shows local time, UTC, and lets you input custom timezones.

What's the difference between seconds and milliseconds?

10-digit timestamps are seconds, 13-digit are milliseconds since Jan 1, 1970 UTC.

Timestamps can be in seconds (10 digits) or milliseconds (13 digits).

This tool auto-detects and displays both formats for clarity.

ISO 8601 is the international standard for representing dates and times.

Used by APIs, databases, and most modern programming languages.

Format dates and times in various formats including ISO, RFC, and custom patterns.

Paste your input at the top and the result shows up right below. The FAQ and related tutorials are there if you want more.

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