# Clock time fuzzer

World's simplest time tool
With this browser-based application, you can add random perturbations to one or more clock times. A random perturbation creates a deviation in a clock time and offsets it by a random time interval called the fuzzy interval, which is expressed in hours, minutes, and seconds. In the options, you can set the minimum and maximum fuzziness values to control the deviation. Additionally, you can preserve the given clock time format, or normalize it to 12-hour and 24-hour clock formats. Created by computer nerds from team Browserling.

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## What is a clock time fuzzer?

learn more about this tool
This is a quick online utility for adding fuzziness to the given clock time or timer value. It modifies all clock times or timers that are entered in the input and adds or subtracts a random number of seconds, minutes, or hours from them. The amount of fuzziness can be adjusted in the options by specifying the maximum and minimum fuzziness values. For example, if you have a fuzziness value set to 5 minutes, then the given clock time "10:30:45" may become "10:33:12", or "10:31:53", or "10:26:01". In this case, the fuzzing algorithm randomly picks a new time value in the range from "10:25:45" (-5 minutes of 10:30:45) to "10:35:45" (+5 minutes of 10:30:45). If you need to generate values greater than the specified time (in the range from "10:30:45" to "10:35:45"), then prefix the fuzziness value with a "+" sign, for example, "+5 min". Similarly, if you want to get times from the range that's smaller than the specified time (from "10:25:45" to "10:30:45"), then prefix the fuzzy value with a "-" sign, for example, "-5 min". The additional option called "minimum fuzzy interval" allows you to control the fuzzing process in finer detail. With this option, you can set the minimum increment or decrement value for the random algorithm. For example, if the primary fuzziness value is set to 5 minutes and the minimum fuzziness interval is 2 minutes, then the fuzzy algorithm will turn the given clock "10:30:45" into any value from the intervals from "10:25:45" (-5 minutes from 10:30:45) to "10:28:45" (-2 minutes from 10:30:45) and from "10:32:45" (+2 minutes from 10:30:45) to "10:35:45" (+5 minutes from 10:30:45). The values from the interval "10:28:45" to "10:32:45" will never be picked as they don't meet the minimum requirement. Both fuzziness values can be specified using free-form language that uses the words "seconds", "minutes", "hours", and their short forms such as "sec", "min", "hr". For example, you can write "1 second", "5 hours", or "3sec 2min 1hr". You can enter multiple times into the input area, each on a new line, using both the 12-hour and 24-hour clock formats. Three clock format modes allow you to keep the original time format, convert all times to the 12-hour format, or turn all clocks to the 24-hour format. You can also control the time overflow. Time overflow happens when time exceeds 24:00:00. If time overflow is allowed, then the new clock values will show times such as 24:30:00 but if it's turned off, then this time will be reset to 00:30:00. Timeabulous!

## Clock time fuzzer examples

Click to useCreate Time Perturbations

In this example, we're creating a data set for fuzzy testing an astronomical algorithm that uses clock times. For our data set, we need ten times that are centered around the time 24:00:00 so we add fuzziness to all of them and get ten different times that are all close to and centered around midnight. We use a small perturbation parameter of "1 minute 30 seconds" and keep the same clock format as the input.

24:00:00
24:00:00
24:00:00
24:00:00
24:00:00
24:00:00
24:00:00
24:00:00
24:00:00
24:00:00

23:58:42
00:00:20
00:01:05
00:01:10
23:59:03
23:59:43
00:01:29
23:59:45
00:00:37
23:59:44

**Required options**

Specify the maximum time
fuzziness, such as "1 min",
"5 sec" or "2h 2m 2s".

Specify the minimum time
fuzziness.

Print times in the original
clock format.

Use two-digit padding in
all time components.

Reset time to 00:00 if it
goes beyond 24:00.

1-hour Fuzziness

In this example, we set the fuzziness interval to 1 hour, which means that each time will be incremented or decremented by any value between 0 seconds and 3600 seconds (1 hour). We preserve the input clock format (be it 12-hour format with an am/pm prefix or military 24-hour format) and also select the strict output time mode, which turns all times that go over 24:00 into proper times that start at 00:00.

03:15
5:10 pm
12:36
18:20:30
21:59
7 am
10:40pm
23:59:59

02:18:13
04:48:44 pm
12:55:41
19:17:55
22:26:42
07:59:09 am
09:51:55 pm
00:30:04

**Required options**

Specify the maximum time
fuzziness, such as "1 min",
"5 sec" or "2h 2m 2s".

Specify the minimum time
fuzziness.

Print times in the original
clock format.

Use two-digit padding in
all time components.

Reset time to 00:00 if it
goes beyond 24:00.

Random Time Increments

In this example, we prefix the maximum fuzziness value with a plus sign "+30 min". This prefix makes the fuzzer only randomly increase the time values (they are never decreased). We also set the minimum fuzzy value to be 5 minutes. This way all random increments range from 5 minutes to 30 minutes. We choose the 24-hour output format and also allow times to exceed 24 hours.

19:50
00:11:30
09:20:45
05:30 am
24:00:00
36:45:30

20:02:59
00:40:20
09:48:28
05:47:52
24:07:47
37:07:38

**Required options**

Specify the maximum time
fuzziness, such as "1 min",
"5 sec" or "2h 2m 2s".

Specify the minimum time
fuzziness.

Print times in 12hr format.

Use two-digit padding in
all time components.

Extend time to values such
as 25:00, 26:00, etc. if the
time goes beyond 24:00.

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/add-fuzziness-to-clock-times

__?input__=24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00%0A24%3A00%3A00&fuzziness=1%20min%2030%20sec&min-fuzzy-interval=&use-given-clock-format=true&strict-time=true&padding=true
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