What regex flags does this tool support?

Helperzy Regex Tester supports g (global), i (case insensitive), m (multiline), s (dotAll), and u (unicode) flags.

Regex test kaise kare online free mein?

Helperzy Regex Tester mein apna pattern aur test string daalo. Matches automatically highlight ho jayenge — bilkul free.

Can I see capture groups in the results?

Yes. All capture groups and named groups are shown in the match details panel below the test string.

Is this regex tester compatible with Python regex?

Mostly yes. Helperzy uses JavaScript regex engine. Most patterns are compatible with Python, but some Python-specific syntax may differ.

Free Regex Tester – Test Regular Expressions Online

Test and debug regular expressions online for free. Live match highlighting with flags support.

How to Use Regex Tester

Enter Your Regex Pattern

Type your regular expression in the pattern field. Add flags as needed.

Enter Test String

Paste the text you want to test your regex against.

View Matches

All matches are highlighted in real time. View match details and capture groups below.

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Test and Debug Regular Expressions with Live Highlighting

Helperzy Regex Tester lets you write, test, and debug regular expressions with real-time match highlighting. See all matches, groups, and capture groups highlighted in your test string. Supports all standard regex flags (g, i, m, s, u). Compatible with JavaScript, Python, and most regex flavors. Essential tool for developers validating email patterns, parsing data, and building search logic. No signup, completely free.

Frequently Asked Questions – Regex Tester

Enter your regex pattern in the pattern field and your test string below. Helperzy highlights all matches in real time as you type.

Professional standards, zero cost.

Helperzy is built for everyone — developers, students, and professionals who need fast, reliable tools without the friction.

Always Private

Browser-based tools run 100% on your device. Your files are never uploaded, never seen by us, never stored anywhere.

Edge Optimised

Processes are distributed across global edge nodes for minimum latency. Server-side files auto-deleted in 60 minutes.

Always Free

Every tool is free forever. No account, no credit card, no email required. Open a tool and start in seconds.

Works Everywhere

No software to install. All browser-based tools use modern Web APIs — fast, offline-capable, and always available.

Common Questions

Absolutely. For all browser-based tools your files never leave your device — processing happens entirely in your browser. For server-side tools like PDF to Word, files are encrypted in transit, processed in isolated memory, and permanently deleted within 60 minutes.

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