Test Python regex patterns that match Python's re module behavior - including (?P<name>) named groups, (?#...) comments, and the re.VERBOSE flag. Note: this tool runs in JavaScript so a small set of Python-only features (recursive patterns, conditional matches) aren't supported. For 95% of practical regex, behavior matches Python's re module.
When to use this
Use when: writing regex for Django / Flask / FastAPI code, parsing log files in Python scripts, validating data in pandas DataFrames, building scrapers with BeautifulSoup that need regex extraction, debugging Python regex that works locally but fails in production.
Frequently Asked Questions
What Python re features aren't supported in this tester?
Recursive patterns (?R) or (?0), conditional patterns (?(id)yes|no), and the regex module's fuzzy matching aren't supported - they're outside the standard re module too. Atomic groups (?>...) work. The 95% of Python regex you write daily will work identically here.
How do I write a verbose / commented regex?
Add the 'x' flag (re.VERBOSE in Python). With 'x', whitespace and # comments inside the pattern are ignored, so you can write multi-line regex with inline comments. Great for complex regexes you want to revisit later.
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