pemistahl/grex

Health v2 · maintenance only

Adoption not part of the score

8173 stars · 197 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

grex is a command-line tool and Rust library (with Python bindings) that automatically generates regular expressions from user-provided test case strings. It simplifies writing regex patterns by inferring them from examples.

Use cases

• generate a regex from example strings
• infer regular expression from test cases
• simplify writing regex patterns
• convert sample strings into a regex
• learn regex by examples
• automate regex creation from input samples

When to choose

• you have example strings and need a matching regex quickly
• you want a CLI or Rust/Python library for regex synthesis
• you struggle with writing complex regex patterns manually

When to avoid

• you need a regex debugger or visual regex tester
• you need regexes optimized for specific regex engines' syntax beyond common features
• you need to extract regexes from arbitrary text without examples

Facets

cli-tool · maturity active

parser developer-tools cli developer-tools parsers windows rust python cli cross-platform regex-generation regular-expressions rust-library python-bindings test-cases command-line linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="pemistahl/grex")