chmod Calculator
Convert chmod numeric and symbolic permissions
π 100% client-side β your data never leaves this pageAbout this tool
Convert between numeric (octal) and symbolic chmod permissions with an interactive permission matrix. Instantly see the corresponding chmod command, recursive command, and a breakdown of what each permission bit means for owner, group, and others. Includes common permission presets like 755 and 644. Everything runs entirely in your browser.
Frequently Asked Questions
What does 755 mean in chmod?
755 means the owner has read, write, and execute permissions (7), while group and others have read and execute permissions (5). It is commonly used for executable files and directories.
What is the difference between numeric and symbolic permissions?
Numeric (octal) permissions use numbers like 755 or 644, where each digit represents read (4), write (2), and execute (1). Symbolic permissions use letters like rwxr-xr-x to represent the same bits.
Is it safe to use 777?
777 grants full read, write, and execute permissions to everyone. It is generally not recommended for production environments due to security risks.