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Chmod Calculator

Build Owner, Group, and Others permissions visually in this tab, then copy octal, symbolic, or a chmod command.

Processed in your browser

Calculation runs in this browser. We do not send paths or modes.
Permission math finishes in this browser. Paths and modes stay on this device and are not uploaded.
Permissions

Owner

Group

Others

Special bits

Common presets

Adjust checkboxes, or type octal and apply.

Enter 3 or 4 octal digits (0–7), then apply.

rwx form with s/S/t/T when special bits apply.

Template uses placeholder path path.

Features

Checkbox grid

Toggle Read, Write, and Execute for Owner, Group, and Others.

Special bits

setuid, setgid, and sticky with correct s/S/t/T and 4-digit octal.

Bidirectional sync

Type octal and apply to update the checkboxes.

Stays in the browser

Math runs on this device. Paths are not uploaded.

How to use

  1. Toggle Read, Write, and Execute for Owner, Group, and Others.
  2. Optionally enable setuid, setgid, or sticky — or type octal and apply.
  3. Copy the octal mode, symbolic string, or chmod command.

Why this tool

Runs in the browser

Core work finishes in this tab.

No upload

Pasted text and local files are not sent away for processing.

Free, no account

The core path has no signup wall.

Immediate

There is no upload-and-wait queue.

10 languages

The same tool ships in ten languages.

Readable failures

Broken input returns a reason, not a blank screen.

FAQ

Are paths or modes uploaded?
No. Calculation runs in this browser.
Are special bits supported?
Yes — setuid, setgid, and sticky, with 4-digit octal and correct s/S/t/T symbols.
What happens on invalid octal?
You get a clear error, not a silent ignore.
Is it free? Do I need an account?
Yes, it is free. No account is required.

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