Chmod Calculator
Runs in browserGenerate Unix file permission commands visually
Quick Presets
Owner (User)
Group
Public (Others)
How to Use
Configure permissions using presets or checkboxes.
You will see:
- Numeric Value (e.g. 755)
- Symbolic String (e.g. -rwxr-xr-x)
- Complete Command
- One-click Copy
Generated Command
Numeric
644
Symbolic
-rw-r--r--
chmod 644 fileAbout Chmod Calculator
Unix file permissions control who can read, write, and
execute
files and directories. This calculator helps you visually construct the correct
chmod command.
Understanding Permissions
Read (4)
View file contents. For directories: list contents.
Write (2)
Modify file contents. For directories: create/delete files.
Execute (1)
Run as program. For directories: enter with cd.
Common Permission Sets
| Value | Description |
|---|---|
| 777 | Everyone can read, write, execute (Insecure!) |
| 755 | Owner full, others read/execute (Scripts) |
| 644 | Owner read/write, others read only (Files) |
| 600 | Only owner can read/write (Secure configs) |
⚠️ Security Best Practice
Avoid 777 on web servers — it gives write access to everyone. Use 755 for directories and 644 for files.