Developer Tools

Regex Tester

Use the Regex Tester online. No account needed.

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g flag is auto-added.
Highlighted matches
Foo BAR baz foo qux
Matches (2)
  1. 1. [0,3) → Foo
    • Group 1: Foo
    • Group 2: (undefined)
  2. 2. [12,15) → foo
    • Group 1: foo
    • Group 2: (undefined)
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What is Regex Tester?

Regex Tester is a free online utility in the "Developer Tools" category. It helps you work faster with a clean, simple interface.

How to use

  1. Open the tool.
  2. Follow on-screen inputs or paste your content.
  3. Copy or download the result.

FAQs

  • Is Regex Tester free? Yes, free to use in your browser.
  • Do I need to sign up? No signup required.
  • Is my data stored? Inputs are processed in-browser when possible.