chmod Calculator

About this chmod Calculator

Unix file modes combine read (4), write (2), and execute (1) for owner, group, and others. Octal forms like 755 and 644 are shortcuts for common web and SSH layouts.

How to use this tool

1. Toggle checkboxes or use presets (755, 644, 600).
2. Copy the chmod command.
3. Optionally enable setuid, setgid, or sticky bits.

Common modes

• 755 — executable scripts and directories
• 644 — normal files (owner write)
• 600 — private keys and secrets

Privacy

Runs locally. Privacy Policy.

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