Unix Timestamp Converter
Convert a date and time to a timestamp, and a timestamp to a date and time
Features
Two-way timestamp conversion
Convert between date and time and Unix time and check the result right away
Shows UTC, local, and ISO together
Show the conversion result in UTC, local time, and ISO 8601 at the same time
Get the current time with one click
Automatically set the current time into the input field with one button
One-click copy of results
Copy each format's value individually to reuse in other tools
How to use
Select the conversion mode and set the direction
Choose "timestamp" or "date and time," and flip the direction with the switch button
Enter the source value
Specify a Unix timestamp, or a date and time with the date picker and time field
Call up the current time with one click
If needed, auto-fill the current value with the "current time" button
Check the result with the convert button
Press the convert button to list the results in four formats, with each value ready to copy
Use cases
Analyze program logs
Convert Unix time recorded in logs to a readable date and time to track down causes
API development and debugging
Convert the timestamp returned by an API to a date and time to quickly verify behavior
Check dates in databases
Visually check the date and time of numbers stored in a DB to check consistency
Set times for reservations and deadlines
Turn a specified date and time into a timestamp to reuse in scheduling processes
Grasp time zone differences
Line up UTC and local time for the same moment to intuitively understand the time difference
Basics
What is a Unix Timestamp
A Unix timestamp is a way to represent date and time as the number of seconds elapsed since January 1, 1970 at 00:00:00 UTC. It is timezone-independent and expressed as a single numeric value, making it widely used for recording dates and times in logs and databases.
Difference Between 10-Digit and 13-Digit
Current Unix timestamps are 10 digits in seconds and 13 digits in milliseconds. If a millisecond value is interpreted as seconds, it will result in a date thousands of years in the future. Therefore, checking the number of digits is the first checkpoint in conversion.
What is the Year 2038 Problem
The Year 2038 Problem is an issue that may occur on January 19, 2038, in legacy systems that store timestamps as 32-bit signed integers, where the value overflows and causes malfunction. In modern systems that have been upgraded to 64-bit architecture, this problem is essentially resolved.
Safety and privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
converting between timestamps and dates and times is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the input values and conversion results and input suggestions are not stored on the server.
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Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.