Regex Tester Online
Our free Regex Tester lets you write, test, and debug regular expressions with live match highlighting. Supports global, case-insensitive, multiline, and dotall flags. See matches with index positions and capture groups, and load common patterns for email, URL, phone numbers, dates, and hex colors.
- Private & secure
- Fast in-browser
- No signup
How to use Regex Tester Online
- Open the tool. Go to Regex Tester on Utilvia. It runs instantly in your browser.
- Enter your values. Fill in the fields. Results update as you type — no signup required.
- Review the output. Check totals, breakdowns, or formatted text before you copy or save.
- Copy or export. Copy the result or download a file. Your inputs stay on this device.
Key features & privacy
Regex Tester Online is built for in-browser use on Utilvia. Work stays on this device whenever the tool runs locally — there is no account wall and no file inbox on our servers.
- Runs in modern browsers with JavaScript and HTML5.
- No signup required to get a result.
- Zero-upload policy on local-first tools — close the tab and the working copy is gone.
- Shareable, indexable URL so you can return to the same utility later.
Frequently asked questions
What is Regex Tester used for?
Test regular expressions with live match highlighting and capture groups. Use it whenever you need a quick result in your browser.
Is my data private?
Yes. Processing runs locally in your browser whenever possible.
Do I need an account?
No signup or login is required.