Chmod Calculator
Calculate Linux file permissions visually online for free. Toggle read, write, execute for owner, group, others. See chmod 777, 755, 644, etc. No signup.
Runs entirely in your browser — files never uploaded
| Read (4) | Write (2) | Execute (1) | Value | |
|---|---|---|---|---|
| Owner | 7 | |||
| Group | 5 | |||
| Others | 5 |
chmod 755 filenameHow to use Chmod Calculator
- 1. Toggle permissions. Click the checkboxes to set read, write, and execute for Owner, Group, and Others.
- 2. Or type a number. Enter a numeric chmod value like 755 and the checkboxes update automatically.
- 3. Copy the command. Copy the full chmod command (e.g. chmod 755 filename) to your clipboard.
FAQ
What does chmod 755 mean?
Owner can read, write, and execute (7). Group and Others can read and execute but not write (5). This is the most common permission for directories and scripts.
What's the difference between numeric and symbolic mode?
Numeric mode uses three octal digits (e.g. 644). Symbolic mode uses letters r, w, x for each class (e.g. rw-r--r--). Both describe the same permissions.
What permissions should I use for web files?
Typically 644 (rw-r--r--) for files and 755 (rwxr-xr-x) for directories. Never use 777 in production — it gives everyone full access.
Does this tool change my files?
No. This is a calculator only — it shows you the chmod command. You run the command yourself on your server or local machine.
What do r, w, and x stand for?
r = read (view contents), w = write (modify/delete), x = execute (run as program, or access directory contents).
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