Chmod permission converter
Convert Unix file permissions between octal and symbolic rwx, including setuid, setgid, and sticky.
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Chmod permission converter: how it works
Practical information to understand the result and use this tool correctly.
About Chmod permission converter
Map a Unix file mode between a 3- or 4-digit octal and the 9-character symbolic form, including setuid, setgid, and the sticky bit.
755 becomes rwxr-xr-x: owner read/write/execute, group and others read/execute. 640 becomes rw-r-----.
1777 becomes rwxrwxrwt. Empty input stays blank. Digits 8 or 9, and broken rwx strings, are rejected.
How to use it
- 1Type an octal mode such as 755, a symbolic string such as rwxr-xr-x, or an assignment such as u=rwx,g=rx,o=rx.
- 2Use a preset to check 755, 640, or the sticky 1777 directory.
- 3Copy the octal and symbolic pair. This does not change files on a server.
Frequently asked questions
- What does chmod 755 mean?
- 755 is rwxr-xr-x. The owner can read, write, and execute. Group and others can read and execute, but not write.
- How do I write a sticky directory?
- 1777 is rwxrwxrwt. The leading 1 is the sticky bit, so only the owner can delete a file inside even if others can write.
- What is rejected?
- Empty input does not convert. 888 and any digit above 7 fail. A symbolic string must be nine rwx characters, with s/S or t/T only in the execute slots.
- Does this run chmod on my computer?
- No. It only translates the mode bits in the browser. It does not touch a filesystem.