Interactive Regex Studio
Regex Tester & Pattern Builder
Test regular expressions with live match highlighting, capture group extraction, replace preview, and instant multi-language code generators (JS, Python, Go, Java, PHP).
Common DevOps Presets:
//g
#1Index: 12..23 (11 chars)
alpine:3.18
#2Index: 36..74 (38 chars)
registry.k8s.io/kube-apiserver:v1.28.2
#3Index: 87..108 (21 chars)
myrepo/web-app:latest
Frequently Asked Questions
What regex flavor does this tester use?
JavaScript (ECMAScript), running client-side inside your browser sandbox. For Python-specific named groups (`(?P<name>...)`) or Java syntax, switch to the dedicated Python or Java regex tools above.
Is my test data uploaded to any server?
No. All regex evaluation and substitutions happen 100% in your local browser memory. No private log entries, IPs, or credentials leave your machine.