Convert chmod values between numeric and symbolic formats, inspect owner, group, and others permissions with a live interactive grid, compare two chmod values side-by-side, view an octal bit breakdown, and get risk indicators — plus a ready-to-use chmod command.
Enter a numeric chmod value, a symbolic value, or both if they match.
Owner, group, others breakdown with ready-to-use command preview.
Owner can read.
Group can read.
Others can read.
For demo-file.txt, the owner can read. Users in the group can read. Everyone else can read.
Type two chmod values to compare them side-by-side, bit by bit.
Last 5 chmod values you used.
chmod maps numeric values to owner, group, and others permissions.
Each digit represents permissions for owner, group, and others.
4 = read, 2 = write, 1 = execute.
755 becomes rwxr-xr-x.
A leading digit adds setuid (4), setgid (2), or sticky (1) — e.g. 4755, 1777.
Calculate permissions from a Linux umask value.
Need to calculate the resulting file and directory permissions from a Linux umask value?
Open umask Calculator