Chmod Permissions Calculator

security

Interactive Linux chmod permissions calculator with octal, symbolic, and binary dual-way synchronization.

100% Client-Side — Processed privately & locally in your browser.

Standard Linux Permissions Presets

Octal Notation

755

Owner(7) Group(5) Others(5)

Symbolic Notation

-rwxr-xr-x

r=read · w=write · x=exec

Binary Representation

111 101 101

9-bit Unix mask

Permission MatrixClick checkboxes to toggle

Role	Read (4)	Write (2)	Execute (1)	Octal
Owner (User)	Read (r)	Write (w)	Exec (x)	7
Group	Read (r)	Write (w)	Exec (x)	5
Others (Public)	Read (r)	Write (w)	Exec (x)	5

Special Linux Permission Bits (Optional)

SetUID (4000)

SetGID (2000)

Sticky Bit (1000)

Chmod Command Snippet

chmod 755 /var/www/html/app

Target File / Directory Path

Recursive (-R) across all subdirectories

Permission Breakdown

No. All processing for this tool occurs directly within your web browser using Web APIs and WebAssembly. Your data never leaves your computer.

Once loaded, most utilities remain functional even if your connection drops. DevtUtils is designed to be lightweight and resilient.

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