UUID generator
Generate random UUIDs in bulk.
Chmod calculator
Tick the permissions you want and get the octal number, the symbolic form and the chmod command.
| Permission | Owner | Group | Others |
|---|---|---|---|
| Read | |||
| Write | |||
| Execute |
Special bits
- Symbolic
- rw-r--r--
- Octal
- 644
- Command
- chmod 644 file
- Command, folders too
- chmod -R 644 folder
Common settings
Files: owner writes, everyone reads
Your files stay on your device
How it works
- 1Tick read, write and execute for the owner, the group and everyone else.
- 2Or type an octal value such as 755, or choose a common setting.
- 3Add setuid, setgid or sticky if you need them.
- 4Copy the chmod command.
What the options do
- Octal value
- Each digit adds read (4), write (2) and execute (1) for one class. 7 means all three, 5 means read and execute, 4 means read only.
- Symbolic
- The nine-character form shown by ls -l, for example rwxr-xr-x.
- Special bits
- Setuid and setgid run a program as its owner or group. Sticky on a folder lets only a file's owner delete it.
Privacy
This tool runs in your browser. Your files are never uploaded to a server.
Questions people ask
What does chmod 755 mean?
The owner can read, write and run it, while the group and everyone else can read and run it. It is a normal setting for scripts and folders.
What should I use for a web server?
Commonly 644 for files and 755 for folders. Avoid 777, which lets any user on the machine change the file.
Why does a folder need execute?
On a folder, execute means permission to enter it and reach the files inside. Without it, even readable files in the folder cannot be opened.
What is a four-digit mode like 4755?
The first digit holds the special bits: 4 is setuid, 2 is setgid and 1 is sticky. 4755 is 755 with setuid on.
Does this change any files?
No. It only builds the command text. You run the command yourself in a terminal.