Regex Tester & Validator

Matches and captures all text occurring between the literal markers 'gcid' and 'web' on a single line. A positive lookbehind ensures the match starts right after 'gcid', while a positive lookahead requires 'web' to follow, so neither delimiter is consumed. With the global and multiline flags, it finds every occurrence across multiple lines. Useful for splitting or extracting content between two known markers, such as parsing IDs or tokens from logs.