Chmod Calculator
Calculate Linux/Unix file permissions visually. Toggle read, write, execute bits for owner, group, and others. Shows both octal (755) and symbolic (rwxr-xr-x) notation with one-click copy.
Understanding Linux File Permissions
Linux file permissions control who can read, write, and execute files. Each file has three groups: owner, group, and others. Each group has three permission bits: read (4), write (2), execute (1). The octal permission is the sum of these bits per group. For example, 755 = owner 7 (rwx), group 5 (r-x), others 5 (r-x).
Frequently Asked Questions
chmod changes permission bits (who can read/write/execute). chown changes ownership — which user and group the file belongs to. You typically need both: set ownership with chown, set permissions with chmod.What is Chmod Calculator?
Chmod Calculator is a free online utility designed to help developers, designers, and technical professionals work more efficiently. This tool runs entirely in your browser — no installation required, no data sent to any server.
How to Use Chmod Calculator
- Paste or type your input in the editor area above.
- Click the action button to process your content.
- Copy the output or download the result.
Key Features
- 100% Free — No registration or payment required.
- Client-side Processing — Your data never leaves your browser.
- Instant Results — Get output in milliseconds.
- No Installation — Works directly in your web browser.
- Mobile Friendly — Works on phones, tablets, and desktops.
Who Uses Chmod Calculator?
This tool is widely used by web developers, software engineers, data analysts, students, and IT professionals who need a quick and reliable way to process data without setting up complex software environments.