Free Online JS Viewer

Open JS Files Instantly

View JavaScript Source File files directly in your browser. No installation, no account. 100% private — files never leave your device.

Drop your file to view it instantly

or click to browse from your device

Desktop: up to 50MB · Mobile: up to 20MB

Optimized for .JS files

How to view JS files online

1Drag & drop your .js file into the zone above, or click to browse
2Your file opens instantly — no upload to any server
3Scroll, zoom, and navigate your document directly in the browser
4Download the original file anytime using the Download button

Frequently Asked Questions

Is this JS viewer free?

Yes, completely free. Open any JS file (JavaScript Source File) with no limits, no sign-up, and no installation required.

Is it safe to open JS files here?

Your JS file is processed entirely inside your browser using client-side JavaScript. It never leaves your device, is never uploaded to a server, and is automatically removed when you close the tab.

What is the file size limit?

Up to 50 MB on desktop and 20 MB on mobile. For larger files, use our Convert tool which can process and compress files efficiently.

Need to convert this JS file?

Convert JS to PDF, PNG, DOCX, and many more formats.

Convert JS Files