Chmod Calculator Online — Convert Numeric Unix Permissions
Convert three- or four-digit chmod values into symbolic rwx permissions and a ready command locally.
About this tool
This chmod calculator reads octal permission digits and converts the final owner, group and other digits into symbolic read, write and execute flags.
How to use
- Enter a value such as 755 or 0644.
- Convert it to symbolic permissions.
- Review the generated chmod command before running it.
Features
- Accepts three or four octal digits.
- Outputs owner, group and other rwx flags.
- Creates a command example.
Common use cases
- Understand file permissions.
- Check deployment commands.
- Translate numeric modes during troubleshooting.
Common issues and tips
- Only digits 0 through 7 are valid.
- The optional leading digit is displayed but special-bit symbols are not expanded.
Privacy
Permission calculation runs locally.
Frequently asked questions
What does 755 mean?
Owner gets rwx; group and others get r-x.
Are special bits shown?
A fourth digit is accepted, but output focuses on the final three rwx groups.
Does it change files?
No. It only generates text.