Folder Size Calculator.

Folder Size Calculator is a high-performance web utility built to calculate directory file sizes. Upload folders and get detailed size charts, file types, and space allocations client-side instantly and securely. Because it is designed with a local-first architecture, all processing occurs directly in your browser's memory using client-side JavaScript. This ensures that your files, code, or private text inputs are never uploaded to any external server or tracked by third-party analytics.

Whether you are formatting source code, cleaning text files, converting file structures, or running diagnostics, running these processes locally in your browser memory sandbox eliminates network latency and protects your data privacy.

Frequently Asked Questions (FAQs)

How do I calculate directory size?

Upload a folder using the directory picker, and the tool evaluates total bytes and sizes.

Do my files upload to your servers?

No. The directory scan runs locally using the browser File System Access API. Your files remain on your disk.

Does it list the largest files?

Yes. It displays list graphs showing size distributions and categorizes files by extensions.

Is this folder size tool free to use?

Yes, it is entirely free and executes locally without accounts.

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