sarwarfx // regex
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PARSING_ENGINE // REGEX_CAPTURE_MATRIX

PATTERN SYNTHESIZER & REGEX TESTER

Interactive regular expression evaluator with synchronized match highlighting, capture group table breakdown, and instant search & replace preview.

REGEXP EXPRESSION & MODIFIER FLAGS
/ /
TEST CORPUS [EDITABLE]
SYNCHRONIZED MATCH HIGHLIGHT 0 MATCHES
CAPTURE GROUP MATRIX 0 RECORDS
# FULL MATCH RANGE CAPTURE GROUPS
NO ACTIVE MATCHES
SEARCH & REPLACE PREVIEW

JavaScript RegExp Engine & Pattern Synthesizer

High-performance ECMAScript regular expression playground executing in your local browser runtime.

01 / REAL-TIME V8 COMPILATION

Pattern compilation utilizes the native browser JavaScript RegExp engine. Matches, indexes, and capture boundaries update with sub-millisecond latency on every keystroke.

02 / DEEP GROUP EXTRACTION

The capture group matrix extracts both positional indexed groups (`$1`, `$2`) and named capturing groups (`(?...)`) for frictionless string extraction.

03 / ZERO DATA RETENTION

Your private code snippets, server access logs, and test data strings never leave your device. All parsing is isolated in browser RAM.

FREQUENTLY ASKED QUESTIONS

Q: What modifier flags are supported?
All standard modern JavaScript flags: `g` (global), `i` (case-insensitive), `m` (multiline `^` and `$`), `s` (dotAll wildcard matches `\n`), and `u` (full unicode code points).

Q: Can I use substitution variables in replacement?
Yes. Supports `$1`, `$2` for capture groups, `$&` for the whole match, and `$`` / `$'` for the preceding/following text.