🔍 Regex Tester
Test and debug regular expressions in real time with match highlighting. 100% browser-based.
You use this tool often? Pro includes files up to 500 MB and priority processing.
What is Regex Tester?
WebFileTools Regex Tester lets you validate and debug regular expressions with instant visual feedback.
How to use this tool?
Enter your regex and test string. Matches are highlighted in real time with group details.
Benefits
- Real-time match highlighting
- Capture group details
- Configurable flags
- 100% browser-based
Frequently Asked Questions
- Which flags are supported?
- Global (g), case-insensitive (i), multiline (m), dotall (s), and unicode (u).
- Can I see capture groups?
- Yes, each match displays numbered and named groups.
- Does it work offline?
- Yes, all processing is done in your browser's JavaScript engine.
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Use →What is Regex Tester?
WebFileTools Regex Tester lets you validate and debug regular expressions with instant visual feedback.
How to use this tool?
Enter your regex and test string. Matches are highlighted in real time with group details.
Benefits
- Real-time match highlighting
- Capture group details
- Configurable flags
- 100% browser-based
Frequently Asked Questions
- Which flags are supported?
- Global (g), case-insensitive (i), multiline (m), dotall (s), and unicode (u).
- Can I see capture groups?
- Yes, each match displays numbered and named groups.
- Does it work offline?
- Yes, all processing is done in your browser's JavaScript engine.
Similar Tools
JSON Formatter
Validate, format, and minify JSON. Syntax highlighting and file import. 100% in the browser.
Use →Text Diff
Compare two texts and visualize differences line by line. Additions, deletions, modifications. Free.
Use →Base64 Encoder
Encode/decode text or a file to Base64. Data URL and one-click copy. 100% in the browser.
Use →