Unix Timestamp Converter — epoch ↔ date

What is Unix Timestamp?

Unix Timestamp (or Unix epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on January 1, 1970 — known as "the epoch". It's the most consistent way computers store time across timezones.

• Linux / macOS / Unix: date +%s returns the timestamp in seconds.
• JavaScript: Date.now() returns milliseconds (×1000).
• Python: time.time() returns seconds as a float.
• Database: PostgreSQL/MySQL TIMESTAMP/DATETIME columns store epoch internally.

Seconds vs milliseconds

• 10 digits = seconds. E.g. 1730000000 (late 2024).
• 13 digits = milliseconds. E.g. 1730000000000.
• 16 digits = microseconds (rare).

The tool auto-detects based on digit count. You can also force seconds/ms via the radio buttons.

When to use it

• Debug an API: response says "created_at": 1730000000 — convert to a real date.
• JWT tokens: exp and iat claims are epoch — check if a token is still valid.
• Database logs: server timestamps — quick conversion to your local time.
• Cron schedules: figure out exactly when a cron job will run next.