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Timestamp Converter

Convert Unix timestamps to human dates and back, with a live epoch clock.

Runs locally in your browser — no upload.

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

  1. Convert a timestamp — type or paste digits like 1779000000 into the timestamp field; seconds and milliseconds are detected automatically.
  2. Read the results — ISO 8601 UTC, local time and relative time appear instantly, each one click from the clipboard.
  3. Convert a date — use the date picker to choose a moment and copy its Unix seconds or milliseconds.
  4. 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.

Frequently Asked Questions

A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC — the 'Unix epoch'. It is the standard way computers store points in time because it is timezone-independent and easy to compare. For example, 0 represents the epoch itself, and 1000000000 marks September 9, 2001.

Yes. Values with up to 11 digits are interpreted as seconds and longer values as milliseconds — a heuristic that covers every real-world date between 1970 and the year 9999 in both units. The converted results are identical either way.

The ISO 8601 result is shown in UTC so it is unambiguous anywhere in the world. The local-time row uses the timezone configured on your device. When converting a date back to a timestamp, the picked date and time are also interpreted in your local timezone.

No. All conversion happens locally in your browser with plain JavaScript. Timestamps and dates you enter never leave your device.

The live epoch clock at the top of this tool shows the current Unix time in seconds, updating every second. Copy it with one click for test data, cache-busting query strings or expiry calculations — no manual lookup needed.

Yes — free, unlimited and without signup. The live epoch clock updates every second, and you can copy any result with one click.

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