Regex Splitter

Enter a delimiter pattern and flags, then split source text into parts locally with a worker timeout guard.

Delimiter regex

Flags

Source text

ReadyEach resulting part is displayed on its own numbered line.

Split-boundary & capture-group preview

Show the exact matched delimiters, capture-group insertions and zero-length matches so JavaScript split behavior is visible before you reuse the pattern on a larger dataset.

Maximum pieces

—Pieces

—Delimiter matches

—Zero-length matches

Ready.

Before reusing a regular expression

keeps the established regex widgets and worker-guarded execution paths intact while connecting testing, explanation, extraction, replacement, test cases, static risk review, and code generation. Pattern data stays in the browser, and the shared inspector can save an explicit pattern locally.

Regex flavor and performance boundaries

Interactive checks follow the JavaScript RegExp implementation available in the current browser unless a tool explicitly says otherwise. Token explanations and backtracking warnings are bounded static guidance, not PCRE/Python/.NET compatibility, formal complexity analysis, or proof that a pattern is safe for every possible input.