Permissions

Calculate chmod permissions with octal and symbolic output | Dev Tools

Interactively flip read, write, and execute bits for owners, groups, and others. See octal, 4-digit (special bits), and symbolic chmod strings update instantly for server hardening or script generation.

Security

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Permissions

Chmod Calculator

Toggle owner/group/other permissions and copy the matching chmod notation.

Security

Owner

Group

Others

Setuid (u+s)

Use caller UID on execution

Setgid (g+s)

Use caller GID on execution

Sticky (t)

Only owners can delete inside dirs

Octal (compact)

755

Octal (4-digit)

0755

Includes special bits as the leading digit.

Symbolic

rwxr-xr-x