chmod Calculator
Check user, group, and other permissions across read, write, and execute. The calculator shows symbolic (`rwxr-xr-x`) and numeric (`755`) representations side-by-side.
Runs locally in your browser
Numeric
Symbolic
-rw-r--r--
| Who | Read (4) | Write (2) | Execute (1) | Octal | rwx |
|---|---|---|---|---|---|
| Owner (u) | 6 | rw- | |||
| Group (g) | 4 | r-- | |||
| Other (o) | 4 | r-- |
chmod (numeric)
chmod 644 filechmod (symbolic)
chmod u+rw,u-x,g+r,g-wx,o+r,o-wx filels -l prefix
-rw-r--r--Numeric
644
Symbolic
-rw-r--r--
Owner
6 / rw-
Group
4 / r--
Other
4 / r--
Setuid runs the program as its owner, setgid as its group. The sticky bit on a directory restricts deletion of files to their owner (e.g. /tmp).
Related tools
About chmod Calculator
Check user, group, and other permissions across read, write, and execute. The calculator shows symbolic (`rwxr-xr-x`) and numeric (`755`) representations side-by-side.
chmod Calculator is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.
Frequently asked questions
644 = rw-r--r-- (owner can read/write, others read-only) — common for files. 755 = rwxr-xr-x (owner full access, others read+execute) — common for directories and scripts.