Regex Tester
Test regular expressions live with match highlighting, groups and flags. JavaScript regex engine.
2 matchessupport@example.com · sales@example.org
About Regex Tester
Test regular expressions live with match highlighting, groups and flags. JavaScript regex engine.
Regex Tester works live as you paste or type — counts, statistics or transforms update on every keystroke, so you always see the current state of your text.
How to Use Regex Tester
- Paste or type your text into the editor.
- Watch the stats or output update instantly as you type.
- Adjust any options (case, delimiters, formatting) if needed.
- Copy the result with one click when you are done.
Key Features
- Live output on every keystroke — no submit button to wait for.
- Handles essays, articles and long documents with ease.
- One-click copy for the finished text or statistics.
Frequently Asked Questions
Can Regex Tester handle long text?
Yes. Regex Tester is built for essays, articles, reports and code documents — results stay instant even for large amounts of text.
Is Regex Tester free to use?
Yes. Regex Tester is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Regex Tester runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Regex Tester work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.