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Toolwright

Unix Timestamp Converter

Convert epoch timestamps in seconds, milliseconds, microseconds or nanoseconds to human-readable dates, and dates back to timestamps. Shows ISO 8601, UTC, relative time and any IANA time zone, with a live clock. Runs in your browser.

Developer Runs in your browser Works offline once loaded

Private by design: your input is processed on this device and never uploaded. Verify it yourself.

Frequently asked questions

How does it know if a number is seconds or milliseconds?

By magnitude: values below 100 billion are treated as seconds, then milliseconds, microseconds and nanoseconds as the numbers grow. The detected unit is shown.

Date Calculator

Days between dates, add or subtract time, age and business days.