Chmod Calculator

Convert between chmod octal and symbolic notation. Everything stays in your browser.

Owner

Read4Write2Execute1

Group

Read4Write2Execute1

Public

Read4Write2Execute1

Special

Setuid4Setgid2Sticky1

octal755

symbolicrwxr-xr-x

From octal

$ cat tips.txt

Bitwise Logic

How to Use

1Toggle Read/Write/Execute per owner, group, public
2Or type an octal like 755 to sync checkboxes
3Copy either notation for your terminal

Stats

Octal

755

Symbolic

rwxr-xr-x

Permissions set

7/12

Tips

•755 = rwxr-xr-x, common for scripts and directories
•644 = rw-r--r--, common for config files
•Avoid 777 — world-writable files are a security risk

Example

Input

owner: rwx, group: r-x, public: r-x

Output

755 → rwxr-xr-x

$ cat tips.txt

Bitwise Logic

How to Use

1Toggle Read/Write/Execute per owner, group, public
2Or type an octal like 755 to sync checkboxes
3Copy either notation for your terminal

Stats

Octal

755

Symbolic

rwxr-xr-x

Permissions set

7/12

Tips

•755 = rwxr-xr-x, common for scripts and directories
•644 = rw-r--r--, common for config files
•Avoid 777 — world-writable files are a security risk

Example

Input

owner: rwx, group: r-x, public: r-x

Output

755 → rwxr-xr-x

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