ToolOrbit
Developer

Chmod Calculator

Understand and build Linux file permissions visually. Tick read/write/execute for owner, group and others and instantly get the octal value (like 755), the symbolic notation (rwxr-xr-x) and the ready-to-run chmod command — or type an octal number and see what it grants.

Examples

Input
755
Output
rwxr-xr-x — owner: read/write/execute; group & others: read/execute
Input
644
Output
rw-r--r-- — owner: read/write; group & others: read only

How to use Chmod Calculator

Set permissions
Tick read, write and execute for owner, group and others — or type an octal value like 755.
Read the result
The octal value, symbolic notation and chmod command update live.
Copy the command
Copy the ready-to-run chmod command for your terminal.

Why use this tool

Live three-way conversion: checkboxes ↔ octal ↔ symbolic
Presets for the permissions everyone looks up: 755, 644, 700, 600, 777
Plain-English summary of who can do what
Warns about risky permissions like 777

Frequently asked questions

The owner can read, write and execute (7 = 4+2+1); group and others can read and execute (5 = 4+1). It is the standard permission for directories and executable scripts.

644 has no execute bits — it is for regular files (owner read/write, everyone else read). 755 adds execute for everyone, needed for scripts and for entering directories.

It lets every user on the system modify the file. On shared hosting or servers, that is an open door for tampering — use the least permission that works instead.

Found a bug or have an idea?

ToolOrbit is actively developed — feedback directly shapes what gets built next.

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