Chmod Calculator

Runs locally in your browser

Calculate and parse Unix permissions from 000 to 777.

Input

Enter 755, 0644 or rwxr-xr-x.

Presets

Common examples, not universally secure. The right permissions depend on context.

Permission matrix
PermissionOwnerGroupOthers
Read (4)
Write (2)
Execute (1)

Read = 4, Write = 2, Execute = 1.

Permissions calculated

Output

Octal mode
755
Symbolic mode
rwxr-xr-x
Example command
chmod 755 path

This example command is never executed. Replace path with your file or directory.

All calculations stay in your browser. Nothing is executed, uploaded or saved in browser storage.

Chmod Calculator

Read contributes 4, write 2 and execute 1 for each role. Octal input accepts 000–777 or a leading zero such as 0644. Symbolic input accepts exactly nine standard rwx positions. Special bits are outside this version. Presets are common examples; appropriate permissions depend on context.

How to use

Type an octal or symbolic mode, click a preset, or toggle role permissions. Copy the octal mode, symbolic string or example command; download all three as text. Invalid drafts stay editable and disable exports until corrected.

Privacy

All calculations stay in your browser. Nothing is executed, uploaded or saved in browser storage.

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