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Free Chmod Calculator Online
Free Chmod Calculator Online is a free online tool by US AI. Set Linux file permissions the easy way. Click the r/w/x boxes for Owner, Group and Others — or type an octal like 755 — and instantly get the matching symbolic notation plus a ready-to-paste chmod command. No signup, works on mobile and desktop.
📖 How to use
- Click the r/w/x checkboxes for Owner, Group and Others, or type an octal code like 755, or pick a preset (644, 755, 600, 700, 777).
- See the octal code, symbolic notation (rwxr-xr-x), plain-English meaning and a copy-ready chmod command instantly.
- Copy the command and paste it into your terminal. Everything runs in your browser — nothing is uploaded.
✨ Why use this tool?
US AI's free chmod calculator uses simple bitmask math trusted by developers worldwide. It is fast, private and 100% free forever. Bookmark this page and share it with anyone managing a VPS or web server.