Timestamp Converter

Timestamp Converter translates between Unix epoch timestamps and human-readable date-time formats in both directions with automatic detection of seconds versus milliseconds input. Enter a Unix timestamp and see the corresponding UTC date, local time, and ISO 8601 string; enter a human-readable date and receive its Unix timestamp in seconds and milliseconds. The tool handles timestamps for any date from the Unix epoch (January 1, 1970) through the year 2038 and beyond, including correct handling of the 32-bit signed integer overflow that affects legacy systems. It also shows the relative time expression such as "3 days ago" for context.

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How to Use

Enter a Unix timestamp in the top input field to convert it to a human-readable date. The tool automatically distinguishes between seconds (10 digits) and milliseconds (13 digits) based on the magnitude of the input. To convert in the reverse direction, type a date and time in the bottom input field using common formats such as ISO 8601, MM/DD/YYYY HH:MM:SS, or natural language like "tomorrow 3pm". Results are shown in UTC, your browser's local timezone, and as a relative time expression. Copy any format with one click.

Common Use Cases

• •Converting Unix timestamps from database records, Elasticsearch documents, and application logs to readable dates for debugging
• •Translating millisecond epoch values from JavaScript Date.now(), Java System.currentTimeMillis(), and API responses to readable dates
• •Converting specific dates such as a contract start date or event time to Unix timestamps for use in database WHERE clauses
• •Interpreting epoch timestamps in log file entries to reconstruct the timeline of events during incident investigation
• •Verifying JWT token expiration by converting the exp claim (Unix seconds) to a human-readable date to check if a token has expired

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