Test regex patterns against sample text with match highlighting.
Enter a regular expression and test string to see matches highlighted in real-time. Shows capture groups, flags support (g, i, m, s, u), and explains match count. Quick regex reference included.
Test regex patterns against sample text with match highlighting.
Flags: g (global), i (ignore case), m (multiline), s (dotAll), u (unicode)
2 matches found
Regular Expression Tester & Validator automatically cleans up indentation, spacing, and line wrapping so diffs stay focused on logic instead of whitespace. Test regex patterns against sample text with match highlighting.
Apply consistent formatting to legacy files, generated code, or quick prototypes without memorizing style rules. Optional controls for indentation, quotes, and maximum line width ensure the output aligns with any internal guideline.
Prepare pull requests faster by reformatting entire files before review, reduce merge conflicts caused by mixed tab/space styles, and keep shared libraries tidy across teams.
Normalize code that originated from design tools, AI generated snippets, or post-migration scripts so that onboarding engineers can read and extend it immediately.
Paste an example into the editor, tweak the options, and copy the resulting config into your CI pipeline for automated enforcement.
Bookmark this page or preload it in documentation portals so contributors always have a fast, zero-install formatter ready when reviewing snippets.
Regular Expression Tester & Validator is frequently searched alongside: regex tester online, regular expression validator, regex matcher, pattern testing tool, regexp playground, regex debugger. Including these terms in documentation helps teammates discover the tool quickly.
No. Everything runs inside your browser. Inputs stay in local memory, and nothing is uploaded to external servers.
Formatting only changes whitespace. It never alters runtime behavior, so you can run it before every commit with confidence.
Yes. Adjust the available options, copy the output, and document the exact settings so teammates can reproduce the same results without guessing.
