Calculate Linux and Unix file permissions interactively. Convert between octal numbers (e.g., 755, 644) and symbolic permissions.
| User Scope | Read (4) | Write (2) | Execute (1) |
|---|---|---|---|
| Owner (User)File creator | |||
| GroupTeam members | |||
| Others (Public)Everyone else |
Calculate Linux and Unix file permissions interactively. Convert between octal numbers (e.g., 755, 644) and symbolic permissions.
Fast and easy from start to finish
Select Permissions: Check the read, write, and execute boxes for owner, group, and others.
Or Use a Preset: Click standard options like 644 for public files or 755 for scripts.
Copy Command: Copy the numeric code or the full terminal command.
What you can do with this tool
Interactive 3x3 permission matrix for Owner, Group, and Public access
Instant conversion between numeric octal notation and symbolic flags (rwxr-xr-x)
Quick preset buttons for common server setups like 755, 644, and 777
Ready-to-copy terminal commands for individual files or recursive folders
Unlock batch scale, higher resolution, and expanded limits
Calculate special permission bits for system administrators.
Create executable permission setup scripts for web servers.
Verify if file permissions adhere to standard server security practices.
Answers to common questions about Chmod Permissions Calculator
Usually 644 for files (read and write for owner, read only for others) and 755 for directories and scripts.
The -R flag applies the permission recursively to all files and subdirectories inside a folder.
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