Epoch converter · s / ms / µs / ns · batch · diff · timezones
Every Unix timestamp, decoded.
Convert epoch timestamps at any precision — seconds, milliseconds, microseconds, nanoseconds — to and from human dates. Batch-convert a column from your logs, diff two times, and see any instant across timezones. All in your browser.
Detected epoch in s · 3 years ago
2023-11-14T22:13:20.000Z2023-11-14 22:13:20 UTC2023-11-14 22:13:201700000000170000000000017000000000000001700000000000000000Across timezones
- UTC
2023-11-14 22:13:20 Tue - America/Los_Angeles
2023-11-14 14:13:20 Tue - America/New_York
2023-11-14 17:13:20 Tue - America/Sao_Paulo
2023-11-14 19:13:20 Tue - Europe/London
2023-11-14 22:13:20 Tue - Europe/Berlin
2023-11-14 23:13:20 Tue - Europe/Kyiv
2023-11-15 00:13:20 Wed - Asia/Kolkata
2023-11-15 03:43:20 Wed - Asia/Shanghai
2023-11-15 06:13:20 Wed - Asia/Tokyo
2023-11-15 07:13:20 Wed - Australia/Sydney
2023-11-15 09:13:20 Wed
Batch convert
Paste a column of timestamps or dates — one per line.
Time difference
Two timestamps or dates.
Why unixstamp
Most epoch converters handle one value in seconds. unixstamp covers the cases that actually slow you down when debugging:
- Every precision — auto-detects seconds, ms, µs and ns, with a manual override.
- Batch a log column — paste many timestamps and get ISO 8601 for each at once.
- Time diff — the duration between any two timestamps or dates.
- DST-aware timezones — one instant shown across the zones you care about.
Frequently asked questions
Is unixstamp free?
Yes — completely free, no account, no sign-up. It runs entirely in your browser.
What is a Unix timestamp?
A Unix timestamp (epoch time) is the number of seconds since 1970-01-01 00:00:00 UTC. It’s timezone-independent, which makes it the standard way to store an instant in logs, APIs and databases.
What are milliseconds, microseconds and nanoseconds?
Different systems store the epoch at different precisions: seconds (10 digits today), milliseconds (13, used by JavaScript and Java), microseconds (16, common in databases), and nanoseconds (19, used by Go and many tracing systems). unixstamp auto-detects the precision from the magnitude, and you can force it.
How does auto-detection work?
It looks at how many digits the number has: ~10 → seconds, ~13 → milliseconds, ~16 → microseconds, ~19 → nanoseconds. If a value is ambiguous, use the unit toggle to force seconds/ms/µs/ns.
Can it convert a whole column from a log file?
Yes. Paste a column of timestamps (or dates), one per line, into the batch box and unixstamp converts each to ISO 8601 UTC — handy for cleaning up logs.
Are the timezone conversions accurate across DST?
Yes. The multi-timezone view uses your browser’s IANA timezone database via the Intl API, so daylight-saving transitions are handled correctly for each zone.
Does anything I paste get uploaded?
No. All parsing and conversion happen locally in your browser — there is no backend and nothing is sent anywhere.