Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and times, and vice versa.
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How to use this calculator
- 1
Choose the conversion direction.
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Enter a Unix timestamp (like 1700000000) or a date string (like 2023-11-14T22:13:20).
- 3
The converted value appears immediately.
- 4
Use "Current timestamp" to get the exact current Unix time.
Frequently asked questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) since January 1, 1970 00:00:00 UTC (the Unix epoch). It is timezone-independent and used universally in programming for date/time storage.
How do I know if a timestamp is in seconds or milliseconds?
Timestamps in seconds are typically 10 digits (e.g. 1700000000). Millisecond timestamps are 13 digits (e.g. 1700000000000). The converter auto-detects which you entered.
What is the Year 2038 problem?
Traditional Unix timestamps stored as 32-bit signed integers overflow on January 19, 2038 (timestamp 2147483648). Modern systems use 64-bit integers which will not overflow for billions of years.
Unix timestamps: the universal language of time in computing
Why timestamps instead of dates?
Timestamps are timezone-independent integers — easy to store, compare, and sort. "2023-11-14T22:13:20+05:30" vs "2023-11-14T16:43:20Z" both equal timestamp 1700000000. Databases, APIs, and logs all benefit from using a single numeric reference point.
ISO 8601 format
ISO 8601 is the international standard for date/time strings: YYYY-MM-DDTHH:MM:SSZ. The Z suffix means UTC. +05:30 means 5 hours 30 minutes ahead of UTC. This format sorts correctly as a string and is unambiguous across locales.
Unix timestamp: how it works
Developer utilities streamline debugging, encoding, formatting, and data validation tasks. This tool is designed for engineers who need reliable, fast results without switching between applications.
Who uses this tool?
Front-end developers, back-end engineers, security researchers, and DevOps professionals use it to inspect, encode, and transform data without leaving the browser — saving context switches and copy-paste errors.
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