Paste the code
The tool scans the pasted text for branches, boolean conditions, and nesting depth to estimate cyclomatic complexity directly from what you gave it.
RISK & COMPLEXITY SCAN
Complexity Hotspot Finder
Paste a function or module and get a real complexity read on which parts are difficult to understand or change safely.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Add the human-risk factors
How often the code changes, how well it's tested, and how many people edit it turn raw complexity into an actual change-risk score.
Get a scored hotspot report
The result combines structural and human signals into one score with specific, checkable numbers — not a subjective 'this looks complicated'.
Continue learning: AI coding tool limitations compared · Best AI coding tools for startups
Frequently asked questions
Does this run a real static analysis tool?
It performs a lightweight, deterministic scan of the pasted text for branch keywords, boolean operators, and nesting depth to approximate cyclomatic complexity — it isn't a full parser for every language, but the numbers change with your actual code.
Why include change frequency and test coverage?
Complex code that never changes and never breaks is low risk in practice. The score weighs how often the code is touched and how well it's protected by tests, not structure alone.
What counts as a good complexity score?
Lower is safer. A high score usually means: extract nested branches into named functions, add guard clauses to reduce nesting, and add tests before the next change if coverage is weak.
Does this work for any programming language?
The branch and nesting detection uses common keywords (if/else/for/while/case/catch) shared across most C-like, Python, and similar languages, so it works reasonably well across languages though it isn't language-specific.
Can I use this on a whole file instead of one function?
Yes, though the result is most actionable on a single function or small module — pasting a very large file will surface size as a risk factor but won't pinpoint which specific function is the actual hotspot.
How We Compare
| Feature | MVPHub | SonarQube | CodeClimate |
|---|---|---|---|
| Instant scan with no repository setup | Included | Not included | Not included |
| Combines structure with change-frequency and ownership risk | Included | Not included | Not included |
| Usable before any git history or scan tooling exists | Included | Not included | Not included |
| Free, no account required | Included | Not included | Not included |
SonarQube and CodeClimate connect to your repository and analyze full commit history, which is more thorough but requires setup and access. MVPHub scans one pasted function instantly and combines it with the team-risk factors you know but a static scanner doesn't — useful for a quick 'is this worth refactoring now' check.
Related tools
Embed this tool
Add this tool to your site with the canonical iframe below. It remains hosted and maintained by MVPHub.