🔐

Chmod Calculator

Calculate Linux/Unix file permissions — click checkboxes or enter a numeric code like 755 or 644.

755

rwxr-xr-x

chmod 755 filename

Type numeric code

	Read (4)	Write (2)	Execute (1)	Value
👤 Owner				7
👥 Group				5
🌍 Others				5

Common Presets

About Chmod Calculator

Working with code and configuration files often means switching between formats, encoding strings, or validating syntax. Chmod Calculator eliminates the need for desktop software or command-line utilities by giving you a clean, instant interface right in your browser. Paste your input, get your result — no accounts, no installations, no data leaving your machine.

How to Use

Enter or paste your input Type or paste your data into the input area. You can also use keyboard shortcuts (Ctrl+V) for quick pasting.

Configure options Adjust any settings or options above the input area to customize the output format and behavior.

Process your data Click the primary action button to process your input. The result appears instantly — no server round-trips.

Review the output Check the output area for your processed result. Any errors or warnings will be displayed clearly.

Copy or download Use the Copy button to copy the result to your clipboard, or download it as a file if that option is available.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Chmod Calculator?

⚡

Instant Results, Zero Setup No need to install CLI tools, configure environments, or write scripts. Chmod Calculator gives you the result instantly in your browser — paste, click, done.

🔒

Your Code Stays Private All processing runs locally using JavaScript. Your source code, API keys, tokens, and configuration data never leave your browser — not even temporarily.

🔄

Part of Your Dev Workflow Bookmark this tool alongside your IDE and terminal. When you need a quick format, encode, or validation, it's one tab away — faster than installing yet another npm package.

📱

Use It Anywhere Works on any device with a modern browser — laptop, tablet, or phone. Perfect for quick fixes when you're away from your development machine.

Frequently Asked Questions

755 = owner: rwx (7), group: r-x (5), others: r-x (5). The owner can read, write, and execute. Everyone else can read and execute but not write. Common for web server directories and executable scripts.

Each permission has a value: Read=4, Write=2, Execute=1. Add the values for each group: rwx=4+2+1=7, r-x=4+0+1=5, rw-=4+2+0=6, etc. The three digits represent Owner, Group, and Others respectively.

chmod 600 gives the owner read+write access with no access for group or others. This is standard for private SSH keys (~/.ssh/id_rsa) and sensitive config files — SSH will refuse to use a key file with too-open permissions.