Chmod calculator
Build Linux file permissions by checking boxes and see the number (755, 644) and the rwxr-xr-x format.
File permissions.
Everything happens on your device: nothing is uploaded to the internet.
| Read (r) | Write (w) | Execute (x) |
|---|
Available in: 
Chmod calculator: what it is for
The calculator converts Linux and Unix file permissions between checkboxes, octal numbers (like 755 and 644) and the symbolic rwxr-xr-x format.
It shows the chmod command ready to copy, in numeric and symbolic form.
How to use
- Type the number or check the permissions.
- Check the rwx format.
- Copy the chmod command.
When to use it
- Set permissions on servers.
- Fix access errors on websites.
- Learn Linux permissions.
Frequently asked questions
What does 755 mean?
The owner can read, write and execute (7). Group and others can read and execute (5). It is the default for folders and scripts.
And 644?
The owner reads and writes (6), group and others only read (4). It is the default for regular files, like HTML pages and images.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.