Testeur Regex

JavaScript RegExp—same as in browsers and Node. Place your content in the input area above, tweak options if needed, then copy the result into your editor, terminal, or documents. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. On a shared computer, close the tab afterward and be careful with sensitive clipboard data.

No. Testing runs locally. Place your content in the input area above, tweak options if needed, then copy the result into your editor, terminal, or documents. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. On a shared computer, close the tab afterward and be careful with sensitive clipboard data.

Invalid syntax (unclosed groups, bad escapes). Fix the pattern or escape special characters. Place your content in the input area above, tweak options if needed, then copy the result into your editor, terminal, or documents. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. On a shared computer, close the tab afterward and be careful with sensitive clipboard data.

In JS replace, $1, $2 refer to groups—test match behavior here first. Place your content in the input area above, tweak options if needed, then copy the result into your editor, terminal, or documents. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. On a shared computer, close the tab afterward and be careful with sensitive clipboard data.

Use flags (m, s where supported) to control line anchors and dot behavior. Place your content in the input area above, tweak options if needed, then copy the result into your editor, terminal, or documents. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. On a shared computer, close the tab afterward and be careful with sensitive clipboard data.