Skip to content

Unix Permissions Calculator

Calculate Unix/Linux file permissions (chmod) with visual editor.

[Lab Tool] [Utilities]

All processing happens locally in your browser. No data is sent to any server.

Read (r)Write (w)Execute (x)
Owner (u)
Group (g)
Others (o)
Special

Permission Values

644 rw-r--r--
Binary 110 100 100
Command chmod 644 filename

What These Permissions Mean

Owner

Group

Others

Common Presets

Permission Reference
Permission Bits
r (4) Read w (2) Write x (1) Execute - (0) No permission
User Classes
u Owner (user) g Group o Others a All (u+g+o)
Special Bits
SUID (4) Run as owner SGID (2) Run as group Sticky (1) Restrict delete
chmod Examples
chmod 755 file chmod u+x file chmod go-w file chmod a+r file