According to this StackOverflow discussion, forward slash can be escaped, but doesn't have to.

At work, we don't escape it, as we don't include JSON into script tags.

What's wrong with s{([/!])}{\\$1}g?

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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In reply to Re: JSON::XS and escaping literal strings by choroba
in thread JSON::XS and escaping literal strings by abelard12

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