chmod Calculator
Toggle read, write and execute for owner, group and others — or type an octal mode, an ls -l string like rwxr-xr-x, or chmod clauses like u=rwx,go=rx and a+x — and see numeric and symbolic forms side by side. Get security warnings for world-writable, setuid and odd combinations, a umask calculator, ready-to-copy chmod and find -exec recipes, and an annotated ls -l sample line.
3 digits set rwx; a 4th leading digit sets setuid/setgid/sticky.
Paste an ls -l mode or chmod clauses — relative clauses (+/-) apply to the current mode.
chmod 644 deploy.shchmod u=rw,g=r,o=r deploy.shfind . -type f -exec chmod 644 {} +find . -type d -exec chmod 755 {} +chmod -R u=rw,g=r,o=r .stat -c '%a %A %n' deploy.sh # macOS: stat -f '%Lp %Sp %N' deploy.shfind . -type d -exec chmod 755 {} + && find . -type f -exec chmod 644 {} +Setuid runs the program as its owner, setgid as its group (on directories: new files inherit the group). The sticky bit on a directory restricts deletion of files to their owner (e.g. /tmp).
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How to use chmod Calculator
- 1Tick the permission boxes, type an octal mode (644, 2775) or paste a symbolic mode (rwxr-xr-x, u=rwx,go=rx, a+x).
- 2Read the warnings — world-writable, setuid binaries and unusual combinations are flagged.
- 3Copy a chmod command or a find -exec recipe from the Commands tab, using your own path.
- 4Use the umask tab to see what new files and directories will get, or which umask yields this mode.
- 5Check the ls -l tab to learn how the mode appears in a directory listing.
About chmod Calculator
Toggle read, write and execute for owner, group and others — or type an octal mode, an ls -l string like rwxr-xr-x, or chmod clauses like u=rwx,go=rx and a+x — and see numeric and symbolic forms side by side. Get security warnings for world-writable, setuid and odd combinations, a umask calculator, ready-to-copy chmod and find -exec recipes, and an annotated ls -l sample line.
chmod Calculator is part of FizzKit — a collection of focused developer and ad-tech tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.