Dead Code Detector
Find and remove unused variables, functions, and imports with this free dead code detector. Clean your source code instantly directly in your browser.
About Dead Code Detector
The Dead Code Detector analyzes your source code to pinpoint orphaned variables, uncalled functions, and unnecessary import statements. Whether you are refactoring an existing project or auditing a single script, this tool helps developers eliminate clutter and maintain leaner codebases.
Because the analysis runs completely in your web browser, your source files remain confidential and are never transmitted to external servers. Use it for fast, frictionless static analysis without configuring build plugins or installing local CLI utilities.
Key features
- Identifies unused variables, parameters, and constants
- Detects unreferenced functions and class declarations
- Flags redundant imports and module dependencies
- Processes code locally on your device for security
- Delivers instant line-by-line issue summaries
- Requires zero installation, configuration, or signup
How to use Dead Code Detector
- Paste your source code into the editor area.
- Select your target language or parsing options.
- Click Analyze to scan for unreferenced code elements.
- Review the flagged line numbers and variable details.
- Edit or copy the cleaned code output.
Who is it for?
- Refactoring legacy codebases to remove technical debt
- Reducing bundle size prior to production deployments
- Performing rapid code reviews during pull requests
- Teaching cleaner programming habits and code discipline
Frequently asked questions
What is dead code in software development?
Dead code refers to sections of a program that are never executed, unreferenced variables, or unused import statements. Removing dead code improves code readability, decreases file size, and reduces maintenance overhead.
Does this dead code detector upload my code to a server?
No. The tool processes your code directly inside your web browser using client-side JavaScript. Your code never leaves your local machine.
What types of unused elements can the tool detect?
It scans for unused variable and constant declarations, uncalled functions, unused parameters, unreachable statements after returns, and unused module imports.
Is this tool free to use?
Yes, this dead code detector is completely free to use without requiring an account or subscription.
Can I use this detector instead of a linter in my CI/CD pipeline?
This tool is intended for quick manual checks, debugging, and snippet refactoring. For automated build pipelines, dedicated linters such as ESLint or static analysis CLI tools are recommended.