JAR to JS file converter | FullyFreeTools

JAR to JS file converter

Turn any .jar into a JavaScript module with embedded base64 and easy byte access.

No signup

No limits

100% free

Convert JAR to JS

Choose your .jar file (max 50MB).

We embed it as base64 in a JS module with helpers.

Import it in your project and access bytes via getJarBytes().

What does the JS file contain?

A JavaScript ES module exporting your base64 JAR and helper functions getJarBase64() and getJarBytes().

Is the conversion reversible?

Yes. Use getJarBytes() to retrieve the original bytes and reconstruct the JAR in the browser or Node.js.

Any size limits?

We recommend up to 50MB for smooth base64 and browser memory usage.

Is my file uploaded to your server?

The conversion is handled in-memory on the server and returned immediately. We don't persist your files.