Free Online Unix Timestamp Converter
Unix timestamps are everywhere — API responses, database rows, log files, JWT claims, cookie expirations — yet they read like noise to humans. A value such as 1779000000 tells you nothing until it is translated. This timestamp converter bridges that gap instantly and in both directions: paste a timestamp to see the exact date and time, or pick a date to get its epoch representation, all without leaving your browser.
The tool handles both common resolutions automatically. Ten-digit values are treated as seconds and thirteen-digit values as milliseconds, matching how APIs typically emit them, so there is no unit dropdown to worry about. Results include the unambiguous ISO 8601 UTC form, your device's local time, and a friendly relative phrase like "in 3 days" or "5 hours ago" that puts the moment in immediate context. Going the other way, the date picker converts any calendar date into Unix seconds and milliseconds, ready to paste into code, cron expressions or database queries.
A live clock showing the current Unix time rounds out the workflow — invaluable when debugging expiry logic or generating test data. Everything runs locally with plain JavaScript math: nothing you type is ever transmitted, logged or stored.
How to Use This Tool
- Convert a timestamp — type or paste digits like
1779000000into the timestamp field; seconds and milliseconds are detected automatically. - Read the results — ISO 8601 UTC, local time and relative time appear instantly, each one click from the clipboard.
- Convert a date — use the date picker to choose a moment and copy its Unix seconds or milliseconds.
- Grab the current time — the live epoch clock at the top updates every second and can be copied with a single click.
Benefits
- Both directions — timestamps to dates and dates to timestamps in one place.
- Automatic unit detection — seconds and milliseconds handled without any toggles.
- Context-aware output — relative phrases like "in 2 months" complement exact ISO and local times.
- Live epoch clock — current Unix time at a glance, updated every second.
- Private and instant — pure client-side conversion, free forever.