Time & Engineering

Unix Timestamp Converter

Convert seamlessly between local machine time, Unix Epoch seconds, milliseconds, and standardized ISO 8601 UTC formats. The live ticker tracks the current timestamp in real time, so you can copy timestamps immediately or paste legacy values to uncover human-readable dates without opening a terminal.

100% Local In-Browser Processing

Zero uploads to external servers. This tool retains a temporary draft in this device's local storage (localStorage) for convenience and continuity. You can delete saved data via the button on the right.

v2.2.0
Size: 0 B
Keys: 0
Depth: 0
Input JSON
Formatted JSON or TypeScript

100% Local In-Browser Processing

Zero uploads to external servers. This tool retains a temporary draft in this device's local storage (localStorage) for convenience and continuity. You can delete saved data via the button on the right.

v2.2.0

Developer Studio

Part of Developer Studio

Alongside timestamp conversions, you can format JSON documents, generate TypeScript types, and calculate hashes in the unified Developer Studio.

Looking for the full suite?

Open Developer Studio

Frequently Asked Questions about Unix Timestamps

What is the difference between seconds and milliseconds in timestamps?

Standard Unix timestamps track seconds elapsed since January 1, 1970 (resulting in 10 digits, widely used across POSIX systems, Python, and SQL databases). In contrast, JavaScript and Java rely on milliseconds (yielding 13 digits), which is why this tool handles conversions across both scales automatically.

Does this tool adjust for daylight saving and local timezones?

Yes: the converter reads your operating system timezone and daylight saving settings, presenting local time alongside UTC strings so you can debug distributed server logs without timezone confusion.