Unix Timestamp Converter — Free Online

Convert Unix timestamps to human-readable dates, or convert dates back to Unix timestamps. Handles milliseconds automatically.

How to Use Unix Timestamp Converter

Enter InputType or paste your input data into the tool interface

ProcessClick the action button to run the tool

Use OutputCopy or download the result for your project

Unix Timestamp Converter — Free Developer Utility

Unix Timestamp Converter — convert Unix timestamps to human-readable dates and times, or convert dates back to Unix epoch timestamps. Unix timestamps count seconds (or milliseconds) elapsed since January 1, 1970 UTC — the Unix epoch. They are used universally in databases, APIs, log files, JWT tokens, and every programming language. When debugging a system that returns unix time values like 1716924000 or 1716924000000, you need to convert them to readable dates instantly. Our converter auto-detects whether the input is in seconds or milliseconds (timestamps over 9999999999 are treated as milliseconds), and outputs UTC time, local time, ISO 8601 format, and day of week.

Keywords and Search Terms

Developers searching for this tool use terms like: unix timestamp, timestamp converter, unix time, epoch converter, timestamp to date. Tooliby provides this utility free with no signup, no watermarks, and no data logging.

Privacy — Your Data is Never Stored

Every input you paste into Tooliby developer tools is processed in memory and immediately discarded. We do not log inputs, store results, or analyze your data. Your code, tokens, API keys, and sensitive strings stay completely private.

Frequently Asked Questions

A Unix timestamp is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is a timezone-independent absolute moment in time used universally across computing systems.

Most Unix systems use seconds. JavaScript Date.now() and many APIs return milliseconds. Our converter auto-detects: inputs longer than 10 digits are treated as milliseconds.

32-bit Unix timestamps overflow at 03:14:07 UTC on January 19, 2038 — the maximum value for a signed 32-bit integer. Modern 64-bit systems handle timestamps past this date correctly.

ISO 8601 is the international standard for dates: YYYY-MM-DDTHH:mm:ssZ. The T separates date and time, and Z indicates UTC timezone. This format is unambiguous and universally parseable.

The converter always shows UTC time as the primary output, and also shows the local time of your browser for reference. Unix timestamps are always UTC by definition.