Chmod Calculator: Linux File Permissions Made Simple
What does chmod 755 actually mean? Tick read, write and execute boxes for owner, group and others and get the number and symbolic form.
Open the free Chmod Calculator →What is the Chmod Calculator?
Linux file permissions: tick boxes to get the chmod number and symbolic form. It's completely free, needs no sign-up and works on any phone or computer.
Why it's helpful
- Visual permission builder
- Number and symbolic output
- Avoids dangerous 777 permissions
Who it's for
Developers, server admins and students learning Linux.
How to use it
- Tick permissions or type a number like 644.
💻 Open source: this tool is free and open source (MIT License). View the code on GitHub, download it and run it offline.
The bigger picture: Developer
Developers lose a surprising amount of time to small tasks: formatting data, decoding tokens, converting between formats and checking syntax. Fast in-browser tools keep you in flow and keep sensitive data off third-party servers.
What's changing: AI coding assistants now write a lot of code, but developers still need quick, trustworthy tools to inspect and verify what comes out: formatters, validators and decoders matter more, not less.
Frequently asked questions
What does 755 mean?
The owner can read, write and execute; everyone else can read and execute.
