Chmod Calculator
Tick read, write, and execute boxes for owner, group, and others to get the exact chmod octal and symbolic notation — plus the command to run. No more guessing.
| Permission | Owner | Group | Others |
|---|---|---|---|
| Read | |||
| Write | |||
| Execute |
How to use Chmod Calculator
Calculate Unix file permissions with an interactive chmod calculator. Convert between octal (755) and symbolic (rwxr-xr-x) notation instantly. Free online.
- Open Chmod Calculator using the tool above — no sign-up needed
- Enter your data or upload a file (processed entirely in your browser)
- Click the action button and get your result instantly
- Copy to clipboard or download your result
Your data never leaves your device — 100% private processing.
Frequently Asked Questions
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Why use Chmod Calculator?
- No installation — use directly from any browser
- Handles large inputs without crashing or timeouts
- Syntax highlighting and formatted output for readability
- Copy to clipboard shortcut for fast workflow integration
Common use cases
- Validate and format JSON responses from APIs
- Encode/decode Base64 strings during debugging
- Generate UUIDs for database seeds or test data
- Minify CSS or JavaScript before deployment
- Diff two code snippets to spot regressions
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