Chmod Calculator
Owner
Group
Others
Common Modes
Calculate Unix file permissions with an interactive checkbox grid. Convert between numeric (755) and symbolic (rwxr-xr-x) notation.
How to Use
- 1 Enter your input or configure options
- 2 See the result update in real time
- 3 Copy the output to use in your project
Why Use This Tool
Private & Secure
Your data never leaves your device. Everything is processed right in your browser — nothing is uploaded or stored on any server.
Lightning Fast
No waiting for uploads or server processing. Results appear instantly because all the work happens on your machine.
Free, No Sign-Up
Use this tool as many times as you want. No account required, no email, no limits — just open and go.
Developer Friendly
Built for developers who need quick, reliable tools without the clutter. Keyboard-friendly and paste-ready.
Frequently Asked Questions
Is Chmod Calculator free to use?
Yes, Chmod Calculator is completely free with no usage limits, no account required, and no ads. You can use it as many times as you need.
Is my data safe when using Chmod Calculator?
Absolutely. Chmod Calculator runs entirely in your browser. Your files and data are never uploaded to any server — everything is processed locally on your device.
Can I use Chmod Calculator for large files?
Yes. Chmod Calculator processes everything in your browser, so it handles most file sizes well. For extremely large datasets, performance depends on your device's available memory.
Does Chmod Calculator work offline?
Once the page is loaded, Chmod Calculator works without an internet connection since all processing happens locally in your browser.