Chmod Calculator is a 100% free, browser-based utility that enables you to convert linux file permissions between 755 and rwx. Unlike traditional cloud converters, all processing executes locally on your device with zero server uploads, delivering immediate results and ironclad data privacy.
About the Chmod Calculator
Every file on Linux, macOS and other Unix systems has read, write and execute permissions for its owner, its group and everyone else. The Chmod Calculator lets you tick the permissions you want and instantly see the numeric value (such as 755) and symbolic form (rwxr-xr-x).
It works in every direction: type a number or a symbolic string and the checkboxes update. Special bits (setuid, setgid and sticky) are supported, and the ready-to-run chmod command is shown for you to copy.
How to use the Chmod Calculator
- Tick read, write and execute for owner, group and others, or type a numeric value like 644.
- Optionally enable special bits such as setuid or the sticky bit.
- Copy the numeric value, symbolic string or the full chmod command.
Features
- Checkbox permission grid
- Numeric ↔ symbolic
- Setuid, setgid & sticky bits
- Ready-to-copy chmod command
Why Choose In-Browser Chmod Calculator vs Cloud Converters?
| Feature | Toolora (In-Browser) | Traditional Cloud Tools |
|---|---|---|
| Data Privacy | 100% Private (Files stay on device) | Uploaded to remote servers |
| File Size Limits | Unlimited (Limited only by your RAM) | Restricted (e.g. 10MB–50MB caps) |
| Processing Speed | Instant (Zero upload/download delay) | Slow upload & queue waiting |
| Ads & Popups | Clean, distraction-free | Heavy banner & interstitial ads |
Frequently asked questions
What does chmod 755 mean?
755 gives the owner read, write and execute (7 = 4+2+1), and gives the group and others read and execute (5 = 4+1). It is the typical permission for directories and executable scripts.
What is the difference between 644 and 755?
644 (rw-r--r--) lets the owner read and write while everyone else can only read; it is standard for regular files. 755 adds execute permission for everyone, which is needed for directories and programs.
Why should I avoid chmod 777?
777 lets every user on the system read, modify and execute the file. On a web server this can allow attackers to change your files, so use the most restrictive permissions that still work.