Chmod Calculator
Convert Linux file permissions between numeric and symbolic modes. User, group, others explained.
How it works
Three simple steps.
Enter a mode
Type a numeric mode like 755 or a symbolic string like rwxr-xr-x.
See the meaning
The tool breaks down each permission for owner, group, and others.
Copy
Copy either the numeric or symbolic form for chmod on your server.
Why use Ercc Chmod Calculator?
Both formats
Works with numeric (755) and symbolic (rwxr-xr-x) permission modes.
Clear breakdown
Shows exactly what each digit or letter grants for user, group and others.
100% local
Everything runs in your browser. Nothing is sent anywhere.
Frequently Asked Questions
755 means the owner has read, write and execute (7=rwx); the group has read and execute (5=r-x); and others have read and execute (5=r-x).
644 gives the owner read/write and others read only, typical for regular files. 755 adds execute for everyone, needed for scripts and directories.
777 gives read, write and execute to everyone. It is convenient but insecure. Avoid it on production servers.
Each permission group is the sum: read=4, write=2, execute=1. So rwx = 7, r-x = 5, r-- = 4, --- = 0.
Yes, 100% free with no limits. Everything runs locally in your browser.