Which regex flavor is used?

JavaScript (ECMAScript) RegExp, as in browsers and Node.

Regex Tester

Test JavaScript regex with flags and highlight matches.

What this tool does

Enter a pattern and flags (g, i, m, s), paste a test string, and see highlighted matches plus capture groups in a table. Runs locally with the JavaScript RegExp engine.

Pattern

Flags

g (global)i (ignore case)m (multiline ^$)s (dotAll)

Test string

Highlighted

—

Capture groups (rows = matches)

Match

No matches

Example input/output

Illustrative sample — your real inputs may look different.

Example input

Pattern: \d{3}-\d{4} · Flags: g · Text: call 555-0199

Example output

Match: 555-0199

Frequently asked questions

JSONPath Tester
Query JSON with dot and bracket path expressions.
JSON Formatter
Format, minify, and validate JSON in the browser.
Text Diff / Compare
Compare two texts line by line with highlights.