TypeScript to JavaScript
LiveStrip TypeScript types, interfaces, and annotations to produce clean JavaScript.
Understanding JavaScript
TypeScript to JavaScript conversion removes type annotations, interfaces, enums, generics, and other TypeScript-specific syntax to produce JavaScript that runs in any environment without a TypeScript compiler. This is needed when sharing code with JavaScript-only projects, publishing npm packages with a JS distribution, testing TypeScript logic in browser consoles, or migrating away from TypeScript. The conversion must strip types while preserving all runtime behavior — removing interface declarations, converting enums to objects, and eliminating type imports.
Convert TypeScript code to plain JavaScript by removing type annotations, interfaces, type aliases, enums, and generic type parameters. Keeps the runtime logic intact. Useful for quick prototyping or sharing code with non-TypeScript projects.
The Devkitr TypeScript to JavaScript Converter strips all TypeScript syntax from your code while preserving runtime behavior. Paste TypeScript to get clean JavaScript with type annotations removed, interfaces deleted, enums converted to objects, and import types eliminated — producing executable JavaScript.
In a typical development workflow, TypeScript to JavaScript becomes valuable whenever you need to strip typescript types, interfaces, and annotations to produce clean javascript. Whether you are working on a personal side project, maintaining production applications for a company, or collaborating with a distributed team across time zones, having a reliable browser-based conversion tool eliminates the need to install desktop software, write one-off scripts, or send data to third-party services that may log or retain your information. Since TypeScript to JavaScript processes everything locally on your device, your data stays private and your workflow stays uninterrupted — open a browser tab, paste your input, get your result.
Key Features
Type Annotation Removal
Strips all type annotations from variables, function parameters, return types, and generics while keeping the runtime code intact.
Interface and Type Deletion
Removes interface declarations, type aliases, and type-only imports that have no runtime representation in JavaScript.
Enum Conversion
Converts TypeScript enums to equivalent JavaScript objects (const enum) or preserves runtime enum behavior with IIFE patterns.
Access Modifier Removal
Strips public, private, protected, readonly, and abstract modifiers that JavaScript does not support at the language level.
How to Use TypeScript to JavaScript
Paste TypeScript Code
Enter the typed code — functions with type parameters, interfaces, enums, or any TypeScript source.
Review JavaScript Output
Verify that all type syntax is removed while runtime logic (functions, classes, variables) is preserved correctly.
Check Enum Handling
If your code uses TypeScript enums, verify they are converted to equivalent JavaScript objects or constants.
Copy JavaScript
Copy the clean JavaScript for use in non-TypeScript environments, browser consoles, or JS-only projects.
Use Cases
Publishing Dual JS/TS Packages
Generate JavaScript distribution files from TypeScript library source code for npm packages that support both environments.
Browser Console Debugging
Remove TypeScript syntax from code snippets to test them directly in browser developer consoles.
Code Sharing with JS Projects
Convert TypeScript utilities and functions to JavaScript for sharing with team members or projects that do not use TypeScript.
Learning What TypeScript Compiles To
See the JavaScript output to understand what TypeScript type features look like after compilation — useful for TypeScript learners.
Pro Tips
Verify that enum conversions produce the correct runtime values — TypeScript enums have complex compilation behavior (numeric vs string enums).
Type-only imports (import type { Foo }) should be completely removed. Regular imports that include both types and values need the type imports selectively stripped.
After conversion, test the JavaScript output to ensure runtime behavior is identical — edge cases around enums and decorators can change behavior.
For a production TypeScript-to-JavaScript conversion, prefer the TypeScript compiler (tsc) over manual conversion — it handles all edge cases correctly.
Common Pitfalls
Assuming removing type annotations is sufficient for all TypeScript features
Fix: TypeScript enums, decorators, and namespace merging have runtime behavior. Simple type stripping is insufficient — these need transformation.
Not removing type-only imports
Fix: import type { User } from "./types" must be completely removed — it references a type that does not exist in JavaScript.
Converting class field declarations without understanding the JS output
Fix: TypeScript class fields with types (name: string = "") become plain JavaScript field declarations (name = ""). Ensure initialization is preserved.
Frequently Asked Questions
QWhat is removed?
Type annotations, interfaces, type aliases, generic parameters, enum declarations, and access modifiers (public/private/protected).
QAre enums preserved?
TypeScript enums are converted to equivalent JavaScript objects or constants.
QDoes it handle TSX (React)?
Yes. JSX syntax is preserved while TypeScript-specific syntax is stripped.
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