Regular Expressions 101

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^[^#%^&*\][}{=+\\|><\`~]*$
/
^ asserts position at start of the string
Match a single character not present in the list below
[^#%^&*\][}{=+\\|><\`~]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
#%^&*
matches a single character in the list #%^&* (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
[}{=+
matches a single character in the list [}{=+ (case sensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case sensitive)
|><
matches a single character in the list |>< (case sensitive)
\` matches the character ` with index 9610 (6016 or 1408) literally (case sensitive)
~ matches the character ~ with index 12610 (7E16 or 1768) literally (case sensitive)
$ asserts position at the end of the string, or before the line terminator right at the end of the string (if any)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/

Test String