Chmod Calculator — Unix File Permissions
Calculate Unix file permissions in octal and symbolic notation. Visual chmod calculator for Linux and macOS.
755chmod 755 filename| Read | Write | Execute | Octal | |
|---|---|---|---|---|
| Owner | 7 | |||
| Group | 5 | |||
| Others | 5 |
Common Permissions
What is chmod?
chmod (change mode) is a Unix/Linux command that sets file permissions. Permissions control who can read, write, or execute a file. They are divided into three groups: owner, group, and others.
How Octal Notation Works
Each digit (0-7) represents a combination of read (4), write (2), and execute (1) permissions. For example, 7 = rwx (4+2+1), 5 = r-x (4+1), 0 = --- (no permissions). A common setting is 755, giving the owner full access and everyone else read + execute.
About This Tool
The Chmod Calculator is a free online tool available on CodeUtilo. Calculate Unix file permissions in octal and symbolic notation. All processing happens directly in your browser — no data is ever sent to any server, ensuring your privacy and security. No signup or installation is required.
Key Features
- Browser-Based Processing — All chmod calculator operations run locally in your browser using JavaScript. Your data never leaves your device.
- Instant Results — Get results immediately as you type or paste your input. No waiting for server responses or page reloads.
- Free & No Signup — Use the chmod calculator as many times as you need without creating an account or paying anything.
- Mobile Friendly — Works on desktop, tablet, and mobile browsers. Access this tool from any device with an internet connection.
Common Use Cases
- Using the chmod calculator for day-to-day development tasks
- Saving time on repetitive tasks by using a browser-based tool instead of writing custom code
- Working on projects where installing software is not an option (school, work, shared computers)
- Quick prototyping and debugging without switching to a terminal or IDE
- Sharing the tool link with colleagues who need the same functionality
How to Use
Enter your input in the text area provided and the chmod calculator will process it instantly. Use the Copy button to copy the result to your clipboard. All operations are performed locally in your browser — no data is transmitted to any server.
Frequently Asked Questions
Is the Chmod Calculator free to use?
Yes, the Chmod Calculator is completely free with no usage limits. There is no signup or registration required. You can use it as many times as you need.
Is my data safe when using this tool?
Yes. All processing happens locally in your browser using JavaScript. Your data is never uploaded to any server or stored anywhere. Everything stays on your device.
Does this tool work on mobile devices?
Yes. The Chmod Calculator is fully responsive and works on smartphones, tablets, and desktop computers. You can use it from any modern browser on any device.
Do I need to install anything?
No. The Chmod Calculator runs entirely in your web browser. There is nothing to download or install. Just open the page and start using it immediately.
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