Unix Timestamp Converter

How to Use

The tool initializes with the current time. Enter a Unix timestamp (seconds) or use the date-time picker to select a date. Both inputs are bidirectional — changing one updates the other. Click "Now" to reset to the current time. Use copy buttons to copy any format.

What Is a Unix Timestamp

A Unix timestamp (also called epoch time) represents the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is widely used in programming, databases, and APIs as a universal way to represent points in time. Negative values represent dates before 1970.

Use Cases

• API date handling — convert timestamps returned by REST or GraphQL APIs into human-readable dates
• Database timestamp debugging — translate Unix times stored in your database to real dates for data verification
• Log analysis — convert epoch times in server and application logs to readable dates for timeline analysis
• Cron job scheduling — convert specific dates to Unix timestamps for schedule configuration and conditional logic

Known Issues

• Y2K38 problem — 32-bit signed integers overflow at 2,147,483,647 (January 19, 2038), causing failures on legacy systems
• Seconds vs. milliseconds — JavaScript's Date.now() returns milliseconds, but the Unix standard uses seconds. A 1000x difference is easy to miss
• Timezone pitfalls — Unix timestamps are always UTC, but when converting to local time, verify that timezone offsets are applied correctly

Notable Timestamps

• 0 → 1970-01-01 00:00:00 UTC — the Unix epoch (origin)
• 1000000000 → 2001-09-09 01:46:40 UTC — the 1-billion-second milestone
• 1234567890 → 2009-02-13 23:31:30 UTC — the sequential timestamp
• 2000000000 → 2033-05-18 03:33:20 UTC — the 2-billion-second milestone
• 2147483647 → 2038-01-19 03:14:07 UTC — 32-bit signed integer maximum (Y2K38)

Privacy

All conversion happens entirely in your browser. No data is sent to any server.