Bitcoin Address Regular Expression

A regular expression to parse and validate Bitcoin addresses.

/^(bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}$

What Is Bitcoin Address:

A Bitcoin address is a virtual location where the cryptocurrency can be sent. It is alphanumeric and always starts with a 1 or a 3.

expr	usage
`[ABCD]`	Matches any character in square brackets (case sensitive).
`[a-z]`	Matches all lowercase letters (a to z).
`[A-Z]`	Matches all uppercase letters (A to Z).
`{25,39}`	Matches the specified quantity of the previous token. {25,39} will match 25 to 39. {25} will match exactly 25. {25,} will match 25 or more.