Permission Builder
Common Permissions
| Octal | Symbolic | Use Case |
|---|---|---|
755 | rwxr-xr-x | Executable files, directories |
644 | rw-r--r-- | Regular files (HTML, CSS, images) |
600 | rw------- | Private files (SSH keys, config) |
700 | rwx------ | Private directories, scripts |
777 | rwxrwxrwx | Full access (use sparingly!) |
664 | rw-rw-r-- | Group-writable files |
775 | rwxrwxr-x | Group-writable directories |
Understanding Permissions
Unix file permissions control who can read, write, or execute files. Each file has three permission sets:
- Owner: The user who owns the file
- Group: Users in the file's group
- Others: Everyone else
Permission Values
- Read (r = 4): View file contents or list directory
- Write (w = 2): Modify file or add/remove files in directory
- Execute (x = 1): Run file as program or enter directory
The octal value is the sum: rwx = 4+2+1 = 7, r-x = 4+0+1 = 5, r-- = 4+0+0 = 4
Privacy & Limitations
- All calculations run entirely in your browser -- nothing is sent to any server.
- Results are computed locally and should be verified for critical applications.
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Unix Permissions Calculator FAQ
What is Unix Permissions Calculator?
Unix Permissions Calculator is a free developer tools tool that helps you Convert between symbolic (rwx) and octal unix permissions.
How do I use Unix Permissions Calculator?
Enter your input values, review the calculated output, and adjust inputs until you reach the result you need. The result updates in your browser.
Is Unix Permissions Calculator private?
Yes. Calculations run locally in your browser. Inputs are not uploaded to a server by default, and refreshing the page clears session data.
Does Unix Permissions Calculator require an account or installation?
No. You can use this tool directly in your browser without sign-up or software installation.
How accurate are results from Unix Permissions Calculator?
This tool applies standard formulas or deterministic processing logic for estimates. For medical, legal, tax, or investment decisions, verify with a qualified professional.
Can I save or share outputs from Unix Permissions Calculator?
You can bookmark this page and copy outputs manually. Results are not persisted in your account and are typically not embedded in the URL.