🔑Chmod Calculator
Calculate Unix file permission values visually.
🆓 Free🔒 Secure⚡ Instant📱 Mobile-friendly🚫 No signup
Calculate Unix chmod permissions online for free. Visual checkboxes for owner, group, and others.
owner
6rw-
group
4r--
others
4r--
Octal
Type to update checkboxes ↑
Symbolic
-rw-r--r--
Filename
chmod 644 myfile.shCommon permissions
How to Use Chmod Calculator — Step by Step
- 1Check the boxes for owner, group, and others — read, write, and execute
- 2The numeric permission (e.g. 755, 644) and symbolic form (rwxr-xr--) update in real time
- 3You can also type a numeric value to see what permissions it represents
- 4Copy the permission string for use in chmod commands
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Frequently Asked Questions
Is this tool completely free?
Yes. All ToolNest tools are 100% free with no signup required, no account, and no watermarks added to output files.
Are my uploaded files secure and private?
All uploads use HTTPS encryption during transfer. Files are processed on secure isolated servers and automatically deleted within 2 hours of upload.
Does this tool work on mobile phones?
Yes. ToolNest works on any modern browser on iPhone, Android, tablet, or desktop — no app download or plugin needed.
Do I need to create an account?
No. Just open the tool, upload your file, and download the result. No email, no signup, no password.