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Regex Tester
Write a regex pattern and test it against any string in real time. All matches are highlighted. Supports flags (global, case-insensitive, multiline) and shows captured groups.
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What is Regex Tester?
Write a regex pattern and test it against any string in real time. All matches are highlighted. Supports flags (global, case-insensitive, multiline) and shows captured groups.
Regex Tester is part of ToolFocus — a collection of free, browser-based utilities built for developers, writers, and SEO professionals. No installation, no account, and no data ever leaves your device.
How to Use Regex Tester
- 1Open Regex Tester on this page — no download or sign-up needed.
- 2Paste or type your input into the provided field.
- 3The result is generated instantly in your browser.
- 4Copy, download, or use the output however you need.
Benefits of Using Regex Tester
Completely Private
Your input is never sent to any server. Your data stays on your device.
Always Free
No pricing tiers, no limits, no hidden fees — free forever.
Works Everywhere
Fully responsive on desktop, tablet, and smartphone.
Frequently Asked Questions
What is Regex Tester?
Write a regex pattern and test it against any string in real time. All matches are highlighted. Supports flags (global, case-insensitive, multiline) and shows captured groups.
Is Regex Tester free to use?
Yes. Regex Tester is 100% free with no usage limits and no account required.
Does Regex Tester store or share my data?
No. Regex Tester runs entirely in your browser. Nothing is sent to or logged on any server, keeping your data fully private.
Can I use Regex Tester on a mobile device?
Absolutely. Regex Tester is fully responsive and works on all screen sizes including phones and tablets.
Do I need to install anything to use Regex Tester?
No installation is needed. Simply open the tool in any modern browser and start using it immediately.