Regex Tester & Validator

This PCRE regular expression validates numerical values between 0 and 2, allowing up to eight decimal places. It successfully matches fractional amounts starting with 0 or 1, such as 1.12345678, and strictly limits the value 2 to exactly 2.0 with optional trailing zeros. Given its precision, it is likely used to validate a specific maximum limit for Bitcoin (BTC) transaction amounts or balances.