Free Online Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back instantly. This free online timestamp converter lets you paste any Unix timestamp (seconds since January 1, 1970) and see the exact date and time in your chosen timezone. Enter a date and get the corresponding Unix timestamp for use in code, logs, or API calls. A live clock shows the current Unix timestamp updating in real time, so you can grab the current time with one click. The converter supports all IANA timezones — UTC, Eastern, Pacific, CET, JST, and hundreds more — so you can see what a timestamp means in any location. Whether you are debugging server logs, parsing API responses, scheduling cron jobs, or converting between time formats in a database, this tool gives you the answer immediately. All processing happens in your browser with no data sent to any server.
Frequently Asked Questions
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC. For example, the timestamp 1700000000 represents November 14, 2023, at 10:13:20 PM UTC. Unix timestamps are used extensively in programming, databases, and APIs because they are timezone-independent and easy to compare mathematically.
The standard Unix timestamp is in seconds. However, many programming languages and APIs use milliseconds (JavaScript's Date.now() returns milliseconds, for example). This tool works with seconds by default and shows the millisecond equivalent below. If you paste a 13-digit number, it is likely in milliseconds — divide by 1000 to get seconds.
Systems that store Unix timestamps as 32-bit signed integers will overflow on January 19, 2038, at 03:14:07 UTC (timestamp 2147483647). After this point, the timestamp wraps to a negative number, which would be interpreted as a date in 1901. Most modern systems use 64-bit integers, which won't overflow for 292 billion years. This tool handles timestamps beyond 2038 correctly.
They don't. Unix timestamps are always in UTC — they represent an absolute point in time regardless of timezone. The timezone only affects how the timestamp is displayed as a human-readable date. Timestamp 1700000000 is the same moment everywhere in the world; it just looks different when formatted in Eastern Time vs Tokyo Time.
No. All timestamp conversion happens entirely in your browser using JavaScript's built-in Date object and Intl.DateTimeFormat API. No data is transmitted, stored, or logged.
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