Timestamp Converter

What is a Unix timestamp?

A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds elapsed since January 1, 1970 at 00:00:00 UTC. It's commonly used in computing for storing and transmitting dates.

Seconds vs. milliseconds

Most systems use Unix timestamps in seconds (13-digit), but JavaScript and some databases use milliseconds (10-digit). The converter handles both automatically.

Common timestamp uses

• Logging — Record exact event times for debugging.
• Databases — Store dates in a standardized, timezone-agnostic format.
• APIs — Transmit dates between systems reliably.
• Caching — Use timestamps to track cache expiration.
• Rate limiting — Enforce request limits based on time intervals.

Important dates

• Unix Epoch (Jan 1, 1970) — Timestamp 0
• Y2K (Jan 1, 2000) — Timestamp 946,684,800
• Year 2038 problem — 32-bit signed timestamps overflow on January 19, 2038

Is my data secure?

Yes. All conversion happens in your browser. Your data never leaves your device.