Chmod Calculator

How to use

1. 1. Enter or paste your data in the input area above
2. 2. Adjust settings or options as needed
3. 3. Click the action button or see real-time results
4. 4. Copy the result with the copy button

All processing happens in your browser. Nothing is sent to any server.

About this tool

Calculate Unix file permissions visually with our interactive chmod calculator. Toggle read (r=4), write (w=2), and execute (x=1) permissions for owner, group, and others to see the numeric (octal) notation, symbolic notation, and the complete chmod command. Six common presets are included: 755 (standard executable/directory), 644 (standard file), 777 (full access — avoid in production), 600 (private file like SSH keys), 700 (private directory), and 444 (read-only). Enter a numeric value directly to see the corresponding permission breakdown. Essential for Linux/Unix system administration, web server configuration, SSH key management, and Docker container permissions.

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