Regex Generator

The tool provides a robust regex generator and tester that accepts a regex pattern, optional flags, and multiple test strings. It uses a JavaScript RegExp semantics by default, with optional engine modes for broader PCRE-like behavior. Users compose patterns to match or extract text, and the tool returns precise results for each test case, including full matches and capture groups. It also reports match counts, and the positions of matches to aid documentation and debugging. This upfront validation accelerates development and reduces regression risk across text-processing tasks.

Under the hood, inputs are parsed into a structured representation and compiled into a RegExp object. The engine iterates over each test string, applying the pattern, collecting matches, and recording indices for every occurrence when the global flag is present. For each case, the output includes the matched text, the capture groups, and the start/end positions. Optional features generate candidate test strings to probe alternations, edge cases, and Unicode boundaries; results are exportable as machine- and human-readable JSON.

Target users include developers, QA engineers, data scientists, and IT operations professionals who implement form validation, log parsing, data extraction, or text normalization. The tool differentiates itself with explicit per-string results, named capture support (when available), Unicode-aware processing, and a concise export format. It avoids language-specific dependencies, enabling quick cross-language pattern validation and sharing of pattern behavior with teammates.

Core features include a pattern editor, flags selector, multiple test strings, per-string result panels, capture-group details, and an export option. Use cases cover input validation, log file parsing, data cleaning, and content filtering. The tool outputs a structured summary suitable for documentation and automated testing pipelines and supports storing or reusing patterns across projects.