How to use this developer tool
- Paste or upload TypeScript.
- Select an analysis focus.
- Set the large-interface threshold.
- Run the inspection and review scores and prioritized recommendations.
#120 · Programming Language Developer Tool
TypeScript Inspector
Inspect TypeScript type safety, declaration complexity, assertions, unions, generics, inheritance, dependencies, exported APIs, and maintainability risks in the browser.
Developer Input
Browser-based source processingproperties
Ad space
What this developer tool does
The inspector analyzes TypeScript-specific patterns such as any, unknown, assertions, optional and readonly properties, union size, generic complexity, interfaces, exports, and inheritance.
Structural parse → type-pattern metrics → complexity thresholds → heuristic risk checks → scored recommendations.
Circular references, duplicate shapes, and implicit typing are heuristic signals in single-file analysis.
Example
Input:
interface Result<T,U,V,W> {
value: any;
data: T | U | V | W | string | number | boolean;
}Expected use: Run the selected mode and review the generated output and statistics.Tips for better output
- Replace broad any with unknown when appropriate.
- Break large declarations into domain-specific types.
- Review large unions for maintainability.
- Project dependency health requires multi-file analysis.
FAQ
How can I inspect TypeScript type safety online?
Run Type safety focus to analyze broad types, assertions, optional properties, and explicit return types.
How do I find excessive any usage in TypeScript?
Enable Detect explicit any to count and locate broad any annotations.
How can I detect large TypeScript interfaces?
Set the property threshold and inspect interface member counts.
How do I measure TypeScript generic complexity?
The report counts generic parameters, constraints, and large generic declarations.
How can I find non-null assertions in TypeScript code?
Enable Analyze assertions to report non-null and as-type assertions.
Related developer tools
Supported analysis and output
| Module | Purpose |
|---|---|
| Input | Local browser processing |
| Analysis | Tool-specific lexical and structural logic |
| Output | Copy and download ready |
| Privacy | No upload or server execution |