Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Seconds or milliseconds — auto-detected
A Unix timestamp is the number of seconds elapsed since the Unix epoch — midnight on January 1, 1970 UTC. It is the standard way to represent time in most programming languages, APIs, databases, and log files because it is timezone-independent, always increasing, and trivially comparable.
Many modern systems (JavaScript, Java) use milliseconds instead of seconds. This tool auto-detects the unit: inputs with 13 or more digits are treated as milliseconds, shorter inputs as seconds.
Note: 32-bit signed integers overflow at timestamp 2147483647 (January 19,
2038), known as the Y2K38 problem. Systems that store timestamps as 32-bit
integers will fail at that point. 64-bit integers (used by most modern systems) are safe for
hundreds of billions of years.
Link to this tool with values filled in
Everything after the # stays in your browser — it is never sent to a server — so a
link like this opens the tool ready to go without the values travelling anywhere but the address
bar:
https://crunchify.net/tools/unix-timestamp#timestamp=1700000000
Join the settings with &, and percent-encode each value so that spaces,
newlines and any #, &, = or % inside one
do not break the link. Leave a setting out to accept its default. If a setting is not recognised,
the page says so rather than quietly ignoring it.
mode(alsodirection) — to-date or to-timestamp, defaults toto-date. Whether to read a timestamp and show a date, or the reverse.timestamp(alsots,epoch,unixorq) — text, up to 20 characters. Seconds or milliseconds since 1970, for to-date mode.date(alsodatetimeorwhen) — text, up to 40 characters. A date and time, for to-timestamp mode.timezone(alsotzorzone) — local or utc, defaults toutc. Which zone to read and show times in.
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). It is timezone-independent and used universally in programming, APIs, databases, and log files.
How do I get the current Unix timestamp?
In JavaScript: Date.now() (milliseconds) or Math.floor(Date.now() / 1000) (seconds). In Python: import time; time.time(). In bash: date +%s. The live clock at the top of this tool shows the current timestamp updating in real time.
Is the timestamp in seconds or milliseconds?
This tool auto-detects: 13+ digits = milliseconds (JavaScript style), fewer digits = seconds (Unix style). Current seconds timestamp is 10 digits; milliseconds is 13 digits. Example: 1735689600 is seconds; 1735689600000 is milliseconds.
What is the Y2K38 problem?
On January 19, 2038 at 03:14:07 UTC, 32-bit signed integers storing Unix timestamps will overflow (value exceeds 2,147,483,647). Systems still using 32-bit time storage will malfunction. Most modern systems use 64-bit integers, which are safe for billions of years.
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Updated October 8, 2026