TOOL · 04
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back. Supports seconds and milliseconds, with a live clock.
Current timestamp
—
Timestamp → Date
Date → Timestamp
About Unix timestamps
A Unix timestamp (Epoch time) counts the seconds elapsed since 1970-01-01 00:00:00 UTC. This tool handles both second-precision (10-digit) and millisecond-precision (13-digit) values.
Features
Live clock
The current Unix timestamp ticks away at the top of the page.
Both directions
Timestamp → date and date → timestamp, in seconds or milliseconds.
100% private
All conversion happens locally in your browser.
Free forever
No registration, no limits, no watermarks.
How to use
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1
Read the live clock
The current timestamp in seconds and milliseconds is always shown at the top.
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2
Convert a timestamp
Paste a 10- or 13-digit number and see it as a UTC and local date.
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3
Convert a date
Type a date like 2026-07-20 12:00:00 and get the matching timestamp.
Use cases
APIs & databases
Store and compare times as integers — no timezone ambiguity.
Log analysis
Turn raw log timestamps into human-readable dates instantly.
Cache & expiry
Set and inspect expiration times in seconds since the epoch.
Cross-language dates
Exchange a single integer instead of juggling date-string formats.
Example
1700000000
→ 2023-11-14 22:13:20 UTC1700000000000
→ 2023-11-14 22:13:20 UTC10-digit values are seconds; 13-digit values are milliseconds. Multiply seconds by 1000 to get milliseconds. JavaScript Date uses milliseconds; most APIs use seconds.
FAQ
What is a Unix timestamp?
It counts the seconds (or milliseconds) elapsed since 1970-01-01 00:00:00 UTC, ignoring leap seconds. It is the standard machine representation of time.
Seconds or milliseconds — which do I need?
Most APIs and databases use seconds (10 digits). JavaScript’s Date.now() returns milliseconds (13 digits). This tool accepts both.
Why does the converted time look off by hours?
The timestamp itself is timezone-free (always UTC). The tool shows both UTC and your local time — compare the two labels.