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Code Inspector

Free#9 of 18 in Code Complexity Analyzers

Code Inspector: A free local analyzer with detailed complexity metrics, churn-ranked hotspots, and CI-check APIs. Ranked #9 of 18 in Code Complexity Analyzers by our editors (6.5/10); pricing: Free plan; best for teams needing detailed, free complexity diagnostics.

6.5/10Editor score
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Code Inspector6.5 Visit Code Inspector

At a glance

  • Editor score
    6.5 / 10
  • Pricing
    Free plan
  • Best for
    Teams needing detailed, free complexity diagnostics
  • Free plan
    Yes
  • Paid from
    None
  • Hotspot detection
    Yes
  • Facts checked
    27 Sep 2026

  • Where it wins

    • Measures cyclomatic, cognitive, Halstead, and maintainability metrics
    • Ranks hotspots using complexity and git churn; detects duplicate code
    • Runs locally across 18 languages with CLI output and a Go library API

  • Where it doesn't

    • Metrics CLI and library, not a hosted dashboard
    • No AI features
    • Support is through documentation and the community

Our verdict on Code Inspector

Code Inspector is an open-source Go command-line tool and library for measuring code complexity and maintainability. It suits developers and teams who want local diagnostics across Go and 17 additional bundled languages, without adopting a hosted dashboard or LLM analyzer. It runs on Windows, macOS, and Linux, and can be used directly from the CLI or embedded in custom quality gates and CI checks.

Its analysis goes beyond a single complexity score: it reports cyclomatic and cognitive complexity, Halstead metrics, and Maintainability Index, with per-file and per-function metrics. Hotspot ranking combines complexity with git churn, while token-normalized duplicate detection and import dependency graphs add ways to investigate code structure. The graphs include fan-in, fan-out, and cycle detection. Tree-sitter support is used for the additional bundled languages. This breadth makes the tool a fit for teams that want several kinds of code-quality signals in one local workflow; those seeking a hosted dashboard or AI analysis should look elsewhere.

The project is free and open source, with no commercial pricing or hosted plans described. JSON or tree-formatted CLI output supports scripted use, and the Go library API allows custom quality gates and CI checks. Deployment is self-hosted, so teams choose how to run it in their own environment. Support is through documentation and the community. Code Inspector is a practical option for solo developers and small to mid-market teams comfortable integrating a CLI or library; teams that need a managed service or dedicated support should consider alternatives.

Code Inspector pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on github.com

Code Inspector fact sheet

Free planYes
Paid fromNone
Complexity metricsBoth
Supported languages18
Hotspot detectionYes
IDE feedbackNot verified
Pull-request gatesYes
Trend historyNot verified
DeploymentSelf-hosted
PlatformsWindows, macOS, Linux
SupportDocs, Community
Built forSolo, Small business, Mid-market (editorial estimate)
PricingFree plan
Websitegithub.com
Facts checked27 Sep 2026

Alternatives to Code Inspector

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Featured on iTechGuides

Featured on iTechGuides — Code Inspector 6.5/10

Code Inspector is listed in our Code Complexity Analyzers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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