What is the Chmod Calculator?
Convert Unix file permissions between octal and symbolic. The Chmod Calculator is a free online tool that works instantly in your browser — no installation, no signup and nothing to upload. It sits alongside other Developer tools on DevNibble such as JWT Decoder, UUID Generator, Regex Tester.
How to use the Chmod Calculator
- Enter your values in the fields.
- The result is calculated instantly as you type.
- Copy the output.
Features
- Runs 100% in your browser — your data is never uploaded or stored.
- Free forever, with no account, no ads and no tracking.
- Copy or download your result in one click.
- Fast and responsive on desktop, tablet and mobile.
Frequently asked questions
Is the Chmod Calculator free to use?
Yes — Chmod Calculator is completely free with no sign-up, no ads and no limit on how many times you can use it.
Is my data private when I use the Chmod Calculator?
Everything happens locally in your browser. Your input is never sent to a server, which makes Chmod Calculator safe to use with private or sensitive data.
How do I use the Chmod Calculator?
Choose your options and click Generate. Every result can be copied with a single click.
Are the generated values unique?
Chmod Calculator generates fresh values locally each time you run it, using secure randomness where it matters. Convert Unix file permissions between octal and symbolic.