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Chmod Calculator

Convert between chmod numeric and symbolic notation.

Symbolic (toggle permissions)
User TypeReadWriteExecute
Owner
Group
Others
Special bits
Options
chmod command

Numeric

chmod 755 path/to/file

Symbolic

chmod u=rwx,g=rx,o=rx path/to/file

How to use

About this tool

Convert between chmod numeric (755/2775) and symbolic (rwxr-xr-x), and copy both numeric and symbolic chmod commands. Change the path in the file name field.

How to use

Enter 755 or 2775 in the numeric field, or change the Read/Write/Execute checkboxes in the table for Owner/Group/Others. Toggle special bits (setuid/setgid/sticky) with switches; Recursive (-R) is in the options column to the right. When all special bits are OFF, a leading 0 is omitted (e.g. 0755 → 755). Edit the file name/path field (default path/to/file) to change the path in the command. Two chmod commands are shown: numeric (e.g. chmod 755 path/to/file) and symbolic (e.g. chmod u=rwx,g=rx,o=rx path/to/file); each can be copied.

Options

Numeric: 3 digits (755) or 4 (2775). When all special bits are OFF, leading 0 is not shown. Symbolic: r/w/x for Owner/Group/Others and setuid/setgid/sticky switches. Option: Recursive (-R). File path: default path/to/file. Output: two chmod commands (numeric and symbolic).

Use cases

• Check file/directory permissions • Look up chmod values for scripts or deployment • Learn symbolic vs numeric notation • Paste either numeric or symbolic command into a terminal to run

How it works

Numeric mode is octal: each digit is the sum of r=4, w=2, x=1 (0–7). Three digits are owner, group, others; with four digits the first is special bits (setuid=4, setgid=2, sticky=1). Symbolic form specifies who and which permissions (e.g. u=rwx,g=rx,o=rx); u+s, g+s, o+t add setuid/setgid/sticky.

Privacy and data

All input, conversion, and command generation are done in the browser; nothing is sent to any server.