Developer Tools · 100% Free · Browser-Based
Regex Tester
Test regular expressions with live match highlighting and flag toggles. No signup, no upload, complete privacy.
About Regex Tester
Test regular expressions with live match highlighting and flag toggles.
Our regex tester runs entirely in your browser using modern Web APIs. No file uploads, no data collection, no tracking — your privacy is guaranteed.
Why use our Regex Tester?
- 100% Free — no signup, no watermark, unlimited usage
- Privacy-first — everything runs in your browser
- Global — Worldwide defaults, browser-based privacy
- Works offline — after first page load
- Mobile friendly — works on any device
Frequently Asked Questions
What is Regex Tester?
Test regular expressions with live match highlighting and flag toggles.
Is Regex Tester really free?
Yes — 100% free with no signup, no watermark, and no usage limits.
Is my data safe?
Regex Tester runs entirely in your browser. Your files and inputs never leave your device.
Does it work on mobile?
Yes — works on iPhone, Android, iPad, and any modern browser.