Chmod Calculator
Calculate Unix file permissions
How to Use
1
Enter permissions
Type numeric (755) or symbolic (rwxr-xr-x) notation.
2
Toggle checkboxes
Or click checkboxes for each permission type.
3
View conversions
See both numeric and symbolic formats.
4
Copy result
Copy the chmod command for terminal use.
Frequently Asked Questions
What do the permission numbers mean?
4=read, 2=write, 1=execute. Add together for combined permissions. 755 means rwxr-xr-x (owner all, others read+execute).
What is the difference between symbolic and numeric?
Numeric (755) is compact. Symbolic (rwxr-xr-x) is more readable. Both represent the same permissions.
What permissions should I use?
Directories usually need 755 or 775. Files typically 644 or 664. Executables need 755. Never use 777 in production.