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+Explore, test, and check regular expressions in the terminal.
+
+Given your regular expression and text, crex will output matches,
+capture groups, and details.  crex has a range of options, allowing
+fine grained control over matching and output.  It uses ECMAScript
+grammar by default, while also accepting posix, extended posix,
+awk, grep, and extended grep grammars.  Input can be received by
+piped stdin, or by using the -s option.  Output options include
+plain, colour, and json formats.
+
+WWW: https://octobanana.com/software/crex