chmod Calculator
Calculate Unix file permissions visually and get octal, symbolic, and chmod command output. Free chmod calculator with common presets (644, 755, and more).
| Class | Read (4) | Write (2) | Execute (1) |
|---|---|---|---|
| Owner | |||
| Group | |||
| Public |
Special bits
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Frequently asked questions
What is chmod Calculator?+
Toggle read/write/execute for owner, group, and public — instantly see octal (e.g. 755), symbolic (rwxr-xr-x), and a ready-to-paste chmod command.
How do I use chmod Calculator?+
Presets for 644, 755, 600, 700, and 777. Optional setuid, setgid, and sticky bit. Edit octal directly to update the checkboxes
Is chmod Calculator free?+
Yes, chmod Calculator is completely free. No account or sign-up required, and all processing happens in your browser — nothing is sent to a server.
Is my data safe when I use chmod Calculator?+
Yes. chmod Calculator runs entirely in your browser using JavaScript and Web APIs — your input is never uploaded, transmitted, or stored on any server.