Chmod Calculator

Convert Unix file permissions both ways between octal (755) and symbolic (rwxr-xr-x), with a plain-English breakdown per owner/group/others. Runs in your browser.

Runs in your browser — your file never leaves your device

Frequently asked questions

Is Chmod Calculator free to use?

Yes — Chmod Calculator is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.

Are my files uploaded or stored anywhere?

No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.

Do I need to install anything or create an account?

No installation and no account needed. Chmod Calculator works on any modern browser — Windows, Mac, Linux, Android and iPhone.

How do I use Chmod Calculator?

Open the tool, add your file (or paste your content), adjust any options, then press “Convert permissions”. Your result is ready to download in seconds.

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