Regexr

Developer tools CLI for checking, validating, generating, and working with regular expressions and code patterns. Lint syntax, explain complex expressions, convert between formats, generate templates, diff pattern versions, preview matches, fix common regex issues, and produce reports — all from the command line with persistent local logging.

Commands

Run regexr <command> [args] to use.

Command	Description
`check`	Check regex patterns for correctness and common pitfalls
`validate`	Validate regex syntax and structure
`generate`	Generate regex patterns from descriptions or examples
`format`	Format and prettify regex expressions
`lint`	Lint regex for style, performance, and safety issues
`explain`	Explain what a regex pattern does in plain language
`convert`	Convert regex between flavors (PCRE, JS, Python, etc.)
`template`	Apply or manage regex templates for common use cases
`diff`	Diff two regex patterns and show behavioral differences