Check read/write/execute permissions for Owner/Group/Others
Automatically generates numeric (like 755) and symbolic (like rwxr-xr-x) permissions
Click copy button to copy chmod command for terminal use
Visual Linux file permission settings, convert between numeric and symbolic notation, one-click copy commands
chmod is a command in Linux/Unix systems to modify file permissions. Each file has three types of permissions (read r, write w, execute x) assigned to three classes of users (owner, group, others), represented by octal numbers 4/2/1, combining to get 0-7.
chmod 755 — Owner full permissions, others read and execute (most common, web directories)chmod 644 — Owner read/write, others read only (default for regular files)chmod 777 — Full permissions for all (⚠️ insecure, only for temporary debugging)chmod 600 — Owner read/write only (key files, etc.)chmod +x — Add execute permission (script files)A regex tester lets you write and test regular expressions against sample text in real-time, highlighting matches as you type.
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