How to Test regular expressions

Test regular expressions against sample text in real time. View match groups, global flags, and named captures with color-coded highlighting.

4 min read Regex Tester Free, no signup required

Quick start

Regex Tester — Test regular expressions against sample text in real time.

Get started in under two minutes:

  1. Open the tool and provide your input
  2. Review and adjust settings
  3. Review the output
  4. Copy the result
Open Regex Tester

Step-by-step instructions

Follow these steps to get the best results from Regex Tester:

1

Open the tool and provide your input

Use the input area to provide your content or data.

Tip: No account or signup is needed. The tool is ready to use immediately.
2

Review and adjust settings

Use the settings panel to refine the output. Regex Tester lets you test regular expressions against sample text in real time.

Tip: Watch the live preview update as you change settings.
3

Review the output

The output panel shows a live preview. Scroll through it to verify the result is correct before saving.

Tip: Verify the result before using it in production.
4

Copy the result

Click the "Copy" button to copy the output to your clipboard. The button briefly changes to "Copied!" to confirm the action.

Tip: Paste the result directly into your project, code editor, or document.
Open Regex Tester

Frequently asked questions

Is Regex Tester free to use?

Yes — Regex Tester is completely free with no account or signup required. All core features are available immediately.

Does Regex Tester work on mobile devices?

Yes — Regex Tester works on smartphones and tablets through any modern mobile browser. The interface adapts to smaller screens automatically.

Ready to test regular expressions?

Regex Tester is free to use. No account or signup required.

Open Regex Tester