Calculate chmod permissions
Set Unix file permissions with checkboxes and get the octal value, symbolic notation and chmod command. Presets for 644, 755 and 600. Free tool.
- Files never leave your device
- Free, no sign-up
- No watermark
About Chmod Calculator
Work out Linux and macOS file permissions without converting octal in your head. Tick read, write and execute for the owner, group and others, and the tool shows the octal value such as 755, the symbolic form such as rwxr-xr-x, and the full chmod command to copy. Presets cover the common patterns for files, scripts, private keys and web directories.
How to use Chmod Calculator
- 1
Tick read, write and execute for owner, group and others.
- 2
Read the octal and symbolic notation.
- 3
Pick a preset if you need a common setting.
- 4
Copy the chmod command.
Why use this tool
- Checkbox permission grid.
- Octal and symbolic notation.
- Ready-to-run chmod command.
- Presets such as 644, 755 and 600.
- Works both ways: tick boxes or type an octal value.
Frequently asked questions
The owner can read, write and execute; group and others can read and execute. It is typical for scripts and directories.
The owner can read and write; everyone else can only read. It is typical for regular files.
Private keys should be 600 so only you can read and write them.
Rarely. It lets anyone modify the file, which is a security risk on shared servers.
It allows entering the directory and accessing files inside it.
No. Everything is processed in your browser tab. Nothing you type or paste is sent to CodeMites or any other server.
Yes. There is no account, no watermark and no usage limit. The tool runs in your own browser, so there is no server cost to charge you for.
Yes. It runs in any modern browser on Android and iOS as well as on Windows, macOS and Linux, with nothing to install.
Yes, once the page has loaded. Everything runs in your browser, so you can keep working on a train or plane without a connection.
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