Chmod Calculator
NewCalculate Unix file permissions with a visual toggle grid and symbolic/octal notation.
Permission Grid
Toggle owner, group, and others permissions.
| Class | Read | Write | Execute |
|---|---|---|---|
| Owner | |||
| Group | |||
| Others |
Output
Octal
755
Symbolic
-rwxr-xr-x
Command
chmod 755 filenameDescription
Common Presets
Click to applyFrequently Asked Questions
What is the Chmod Calculator?
The Chmod Calculator is a browser-based reference and calculator for networking concepts including chmod addresses, subnets, and protocol details — useful for network engineers, DevOps professionals, and developers.
How do I look up chmod information?
Enter the relevant value such as an IP address, port number, or MIME type, and the tool instantly displays detailed information including descriptions, valid ranges, and related standards.
What networking standards does the Chmod Calculator cover?
The tool covers common networking standards including IPv4, IPv6, CIDR notation, well-known TCP/UDP port assignments, HTTP headers, and MIME types.
Does the Chmod Calculator work offline?
Yes. When installed as a PWA the entire reference database is cached locally and fully accessible without an internet connection — ideal for restricted or air-gapped environments.
Is the Chmod Calculator free?
Yes, completely free with no sign-up required. All networking reference data is available immediately in your browser.