Deep Nesting Checker
Find functions with deeply nested if/for/while blocks and see how deep each one goes. Free and private: runs in your browser.
Paste code to get the maximum nesting depth of each function. Anything deeper than three levels is flagged with ways to flatten it.
Runs entirely in your browser. Nothing you paste is uploaded or stored.
Use cases
- Check a function before opening a pull request.
- Explain a review comment with numbers instead of opinions.
- Find the riskiest code to refactor first.
Frequently asked questions
How do I reduce deep nesting?
Return early (guard clauses), invert conditions, extract inner blocks into well-named functions, and replace nested loops with lookups where possible.
Is the Deep Nesting Checker free?
Yes. It is free with no sign-up, and it runs entirely in your browser, so your input is never uploaded or stored.
How accurate is a browser-based code check?
It uses fast heuristics on the snippet you paste, so it is great for quick feedback. For whole repositories, cross-file analysis and history, run a full CodeInspector scan.
Related tools
Track complexity, duplication and code smells across your whole codebase with CodeInspector.