⚡ Regex Tester & Debugger
The SolversPro Regex Tester & Debugger is a free browser-based developer utility that validates regular expressions with real-time match highlighting and capture group extraction client-side with zero server uploads.
Common Patterns
ECMAScript Regular Expression Syntax Reference
Standard JavaScript RegExp tokens, character classes, and boundary assertions.
| Token | Category | Description | Example Match |
|---|---|---|---|
| \d / \D | Character Class | Matches any digit [0-9] / non-digit [^0-9] | 4 in "id4" |
| \w / \W | Character Class | Word character [a-zA-Z0-9_] / non-word | user_1 in "@user_1" |
| \s / \S | Character Class | Whitespace (spaces, tabs, newlines) / non-whitespace | \t in "val\t1" |
| ^ and $ | Anchor | Start of line/string and end of line/string | ^http.*$ |
| \b and \B | Anchor | Word boundary / non-word boundary position | \bcat\b matches "cat" only |
| + and * | Quantifier | 1 or more repetitions / 0 or more repetitions | a+ matches "aaa" |
| ? and {n,m} | Quantifier | Optional (0 or 1) / between n and m times | \d{2,4} matches 2026 |
| (...) and (?<name>...) | Grouping | Numbered capture group / Named capture group | (?<year>\d{4}) |
Frequently Asked Questions
Does the regex tester run client-side?
Yes, all regular expression evaluations, match calculations, and capture group extractions execute 100% locally in your browser using the JavaScript RegExp engine without sending your text to any server.
Which regex dialect does this tool support?
It operates on ECMAScript (JavaScript) regular expression syntax, including flags g (global), i (case-insensitive), m (multiline), and s (dotAll).
Can I extract capture groups and match offsets?
Yes, each match card enumerates the full matched substring, character index start/end positions, and all indexed or named capture groups.
Is this regex tester free to use?
Yes, the SolversPro Regex Tester is completely free with no usage quotas, paywalls, or account registration required.
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