Chmod Calculator
Convert file permissions between checkboxes, octal (755) and symbolic (rwxr-xr-x) notation, and get ready chmod commands. Instant and free.
| r | w | x | |
|---|---|---|---|
| Owner | |||
| Group | |||
| Other |
Symbolic notation
rwxr-xr-x
chmod
Frequently asked questions
What does 755 mean?
Three digits for owner, group and others: 7 = read+write+execute (rwx), 5 = read+execute (r-x). So 755 is rwxr-xr-x — typical for scripts and directories.
What is the difference between 644 and 600?
644 is rw-r--r-- (everyone can read, only the owner can write) — standard for files. 600 is rw------- — only the owner has access, common for SSH keys.
Why is 777 dangerous?
rwxrwxrwx allows anyone to read, change and execute the file. Web servers should never run world-writable files — use 644 for files and 755 for directories.