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Clock time validator

World's simplest time tool

With this browser-based application, you can check if the clock time is correct. You can enter multiple times in the input and get the validity status of each time in the output. You can also display a message on the screen with a detailed description of each clock error. Created by computer nerds from team Browserling.
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Validation Result
Output a short message about the clock time state.
Verbose Error Reporting
Display a message describing any errors in clock format.
Clock time validator tool What is a clock time validator?
This is a quick online utility for checking the validity of clock time values. It performs multiple tests to ensure that the time format is correct. A valid clock format is the one that is in the range from 00:00:00 to 24:00:00, including or excluding minutes and seconds. The first thing it checks for is whether the given clock value matches the "hh:mm:ss", "hh:mm", or "hh" format. Next, it checks if all clock components (hours, minutes, and seconds) have one or two digits. Then the next check processes clock component limits. In particular, seconds cannot exceed "59", minutes cannot exceed "59", and hours cannot exceed "24". If the 12-hour time format with am/pm indicators is used, then the maximum allowed hour value is "12". Also, negative values for hours, minutes, and seconds are not allowed. For example, "-3:40:50" is not allowed. If all these checks are successful, the program displays the result "Time is valid.". If at least one of the checks fails, then the program displays "Time is invalid.". If you enable the option to print short result, the program will display "Valid." or "Invalid.". By activating the detailed error option, you can get a message describing the error in the clock time. The validator can also check many times at once if the time values are placed in a vertical column (one per line). Timeabulous!
Clock time validator examples Click to use
Validate Two Clock Times
In this example, we check the validity of two clock times. The first time is correct, but the second time is invalid because the minutes in it are "72", which exceeds the maximum possible value of "59".
18:40:20 11:72:30
Time is valid. Time is invalid.
Required options
These options will be used automatically if you select this example.
Output a short message about the clock time state.
Display a message describing any errors in clock format.
Show Time Format Errors
In this example, we validate a handful of clock times and enable the verbose error reporting mode. With this mode active, you also get a detailed description of all errors. As we can see in the output, half of the timers are invalid and have various errors showing the incorrect format, exceeding the time limit, and the presence of non-digit time parts.
06:00:00 04:30:45:55 12:00:sec 10:45m:45 10:05:34 09:61:20 25:45:30 2:10:5 19:30 23
Time is valid. Time is invalid. (Valid time format is hh:mm:ss.) Time is invalid. (Invalid seconds.) Time is invalid. (Invalid minutes.) Time is valid. Time is invalid. (Minutes greater than 59.) Time is invalid. (Hours greater than 24.) Time is valid. Time is valid. Time is valid.
Required options
These options will be used automatically if you select this example.
Output a short message about the clock time state.
Display a message describing any errors in clock format.
Check a List of Clock Times
In this example, we paste a list of clock values of different formats in the input form and check if they are correct. We use a short status message with an additional description of the error. The clock values that use the full digital time format (24-hr format) have the maximum allowed value of 24:00:00 and the clock values that use the abbreviated digital time format (12-hr format) have the maximum allowed value of 12:59:59.
04:39:33 11:21:24 24:00:01 13:0:0am 6:10 AM 5pm -8:06:25 16:30:01 16:-4:30 09:35:90 21:23:07 14:23:35
Valid. Valid. Invalid. (Maximum time is 24:00:00.) Invalid. (Maximum time is 12:59:59 am/pm.) Valid. Valid. Invalid. (Hours are negative.) Valid. Invalid. (Minutes are negative.) Invalid. (Seconds greater than 59.) Valid. Valid.
Required options
These options will be used automatically if you select this example.
Output a short message about the clock time state.
Display a message describing any errors in clock format.
Pro tips Master online time tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlinetimetools.com/validate-clock-time?input=18%3A40%3A20%0A11%3A72%3A30&show-details=false&short-status=false
All time tools
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Quickly visualize your life in weeks or months.
Quickly print a list of neat-looking clock times (such as 10:11:12).
Quickly print a list of neat-looking calendar dates (such as 2055-05-05).
Quickly convert clock time in H:M:S format to seconds.
Quickly convert seconds to clock time in H:M:S format.
Quickly convert time in 24 hour format to 12 hour format.
Quickly convert time in 12 hour format to 24 hour format.
Quickly find how many seconds have passed since midnight.
Quickly find how many seconds are left till midnight.
Quickly find the difference between two clock times.
Quickly find the difference between two calendar dates.
Quickly find the age difference between two or more people.
Quickly add hours, minutes, and seconds to the given time.
Quickly subtract hours, minutes, and seconds from the given time.
Quickly add days, months, and years to the given date.
Quickly subtract days, months, and years to from the given date.
Quickly change the current time format to any new format.
Quickly change the current date format to any new format.
Quickly round the given clock time up or down.
Quickly round the given calendar date up or down.
Quickly drop seconds and minutes from a clock time.
Quickly drop days and months from a calendar date.
Quickly sort clock times in ascending or descending order.
Quickly sort calendar dates in ascending or descending order.
Quickly check if the given clock time is valid.
Quickly check if the given calendar date is valid.
Quickly find how many hours are in the given days.
Quickly find how many days are in the given hours.
Quickly find the astrological sign by the birthday or any date.
Quickly print a list of the dates of all astrological signs.
Quickly find the average value of multiple clock times.
Quickly find the average value of multiple calendar dates.
Quickly generate a list of random clock times.
Quickly generate a list of random calendar dates.
Quickly create a list of clock times that match your criteria.
Quickly generate a list of calendar dates that match your criteria.
Quickly split the given time period into multiple intervals.
Quickly split the given date period into multiple intervals.
Quickly generate increasing or decreasing clock times.
Quickly generate increasing or decreasing calendar dates.
Quickly print a list of all leap years.
Quickly print a list of all common years.
Quickly test if the given year is a leap year.
Quickly test if the given year is a common year.
Quickly find how old a cat would be if it was a human.
Quickly find how old a human would be if he/she was a cat.
Quickly find how old a dog would be if it was a human.
Quickly find how old a human would be if it was a dog.
Quickly convert a modern Gregorian date to a Julian date.
Quickly convert an ancient Julian date to a Gregorian date.
Quickly calculate the Julian day number for any calendar date.
Quickly convert the Julian day to a regular calendar date.
Quickly print a list of all Easter dates for all years.
Quickly convert a UNIX Epoch time to a human-readable time.
Quickly convert human-readable time to a UNIX Epoch time.
Quickly generate increasing or decreasing UNIX timestamps.
Quickly generate one or more random UNIX Epoch times.
Quickly convert a HH:MM:SS clock to a military HHMM clock.
Quickly convert a military clock HHMM to a HH:MM:SS clock.
Coming soon These time tools are on the way
Draw an Analog Clock
Draw an analog clock that shows particular time.
Draw a Digital Clock
Draw a digital clock that shows particular time.
Animate an Analog Clock
Create a GIF animation of an analog clock.
Animate a Digital Clock
Create a GIF animation of a digital clock.
Draw a Calendar
Draw a daily, monthly, or yearly calendar.
Draw a Lunar Calendar
Draw a calendar that shows moon phases.
Create an Animated Timer
Draw an animation that counts down (or up) time.
Draw an Infinite Spiral Clock
Animate a timeless clock that goes in an infinite spiral.
Draw Time as a Pie Chart
Visualize the given clock time as a pie chart.
Draw Current Year as a Pie Chart
Visualize the current year as a pie chart.
Draw Time as a Bar Chart
Visualize the given clock time as a bar chart.
Draw Current Year as a Bar Chart
Visualize the current year as a bar chart.
Draw a Time Arrow
Visualize the given clock time as an arrow.
Visualize Time Intervals
Draw a visualization of multiple time intervals.
Visualize Time Series
Draw a time series chart.
Find Season by a Date
Print the season (winter, spring, summer, autumn) by a date.
Swap Clock Hands
Swap a clock's hour hand with minute hand.
Reverse Clock Time
Find the reverse of the given clock time.
Invert Clock Time
Find the inverse of the given clock time.
Shift Clock Time
Shift the given clock time by any time interval.
Change Clock Scale
Change the clock scale from 24 hours to any other hours.
Generate Valid Clock Times
Generate a list of valid clock times.
Generate Invalid Clock Times
Generate a list of invalid clock times.
Generate Valid Calendar Dates
Generate a list of valid calendar dates.
Generate Invalid Calendar Dates
Generate a list of invalid calendar dates.
Convert English to Crontab
Create a crontab expression from human language.
Convert Crontab to English
Rewrite a crontab entry into human language.
Convert Seconds To Minutes
Find how many minutes are in the given seconds.
Convert Seconds To Hours
Find how many hours are in the given seconds.
Convert Seconds to Days
Find how many days are in the given seconds.
Convert Seconds to Weeks
Find how many weeks are in the given seconds.
Convert Seconds to Months
Find how many months are in the given seconds.
Convert Seconds to Years
Find how many years are in the given seconds.
Convert Minutes to Seconds
Find how many seconds are in the given minutes.
Convert Minutes To Hours
Find how many hours are in the given minutes.
Convert Minutes to Days
Find how many days are in the given minutes.
Convert Minutes to Weeks
Find how many weeks are in the given minutes.
Convert Minutes to Months
Find how many months are in the given minutes.
Convert Minutes to Years
Find how many years are in the given minutes.
Convert Hours To Seconds
Find how many seconds are in the given hours.
Convert Hours to Minutes
Find how many minutes are in the given hours.
Convert Hours to Weeks
Find how many weeks are in the given hours.
Convert Hours to Months
Find how many months are in the given hours.
Convert Hours to Years
Find how many years are in the given hours.
Convert Days to Seconds
Find how many seconds are in the given days.
Convert Days to Minutes
Find how many minutes are in the given days.
Convert Days to Weeks
Find how many weeks are in the given days.
Convert Days to Months
Find how many months are in the given days.
Convert Days to Years
Find how many years are in the given days.
Convert Weeks to Seconds
Find how many seconds are in the given weeks.
Convert Weeks To Minutes
Find how many minutes are in the given weeks.
Convert Weeks To Hours
Find how many hours are in the given weeks.
Convert Weeks to Days
Find how many days are in the given weeks.
Convert Weeks to Months
Find how many months are in the given weeks.
Convert Weeks to Years
Find how many years are in the given weeks.
Convert Months to Seconds
Find how many seconds are in the given months.
Convert Months To Minutes
Find how many minutes are in the given months.
Convert Months To Hours
Find how many hours are in the given months.
Convert Months to Days
Find how many days are in the given months.
Convert Months to Weeks
Find how many weeks are in the given months.
Convert Months to Years
Find how many years are in the given months.
Convert Years to Seconds
Find how many seconds are in the given years.
Convert Years To Minutes
Find how many minutes are in the given years.
Convert Years To Hours
Find how many hours are in the given years.
Convert Years to Days
Find how many days are in the given years.
Convert Years to Weeks
Find how many weeks are in the given years.
Convert Years to Months
Find how many months are in the given years.
Find Week of the Year
Given a calendar date, find which week of the year it is.
Find Day of the Year
Given a calendar date, find which day of the year it is.
Find Day of the Week
Given a calendar date, find which day of the week it is.
Convert a Bird's Age to Human Years
Find how old a human would be if he/she was a bird.
Convert a Human's Age to Bird Years
Find how old a bird would be if it was a human.
Convert Earth Time to Mars Time
Convert clock time on Earth to clock time on Mars.
Convert Mars Time to Earth Time
Convert clock time on Mars to clock time on Earth.
Generate Palindromic Times
Print a list of symmetric clock times.
Generate Palindromic Dates
Print a list of symmetric calendar dates.
Generate Equal H:M:S Times
Print a list of clock times with hrs equal mins equal secs.
Generate Equal Y-M-D Dates
Print a list of calendar dates with yr equal mon equal day.
Calculate Clock Hand Angle
Find the angle between hour hand and minute hand.
Set Clock Hand Angle
Print a list of all clock times with a specific hand angle.
Set Straight Clock Hands
Print a list of all clock times when hands are in a straight line.
Normalize Clock Times
Given clock times in various formats, convert them to one format.
Normalize Calendar Dates
Given calendar dates in various formats, make them the same format.
Spell Clock Times
Write out clock times in full text format.
Spell Calendar Dates
Write out calendar dates in full text format.
Rotate Clock Times
Cyclically shift HH, MM, SS time parts to the left or right.
Rotate Calendar Dates
Cyclically shift YYYY, MM, DD date parts to the left or right.
Freeform Time Calculator
Perform freeform clock time arithmetics.
Freeform Date Calculator
Perform freeform calendar date arithmetics.
Create Zalgo Time
Generate date and time that only Zalgo can understand.