AnyTool
Your files never leave your device. All processing happens locally in your browser.

What does chmod 755 mean?

chmod 755 gives the owner full read, write, and execute permission, and read plus execute to the group and everyone else (rwxr-xr-x) — the standard for executables and web directories. Toggle the rwx checkboxes or type an octal or symbolic value and AnyTool computes all three notations plus the chmod command instantly in your browser.

  • Convert between octal (755), symbolic (rwxr-xr-x), and rwx checkboxes live
  • Supports setuid, setgid, and sticky-bit (4-digit) permissions
  • Generates a copy-ready chmod command with optional -R recursive
  • Plain-English explanation of who can do what, with risk warnings
  • 100% in-browser — pure math, nothing uploaded

What is

chmod

chmod ("change mode") is the Unix command that sets file permissions for the owner, group, and others across read, write, and execute. Permissions are expressed in octal (e.g. 755) or symbolic (e.g. rwxr-xr-x) notation.

Developer Tools

Related terms

File PermissionsOctalrwxsetuidUnix

How to Calculate chmod Permissions

Convert Unix file permissions between octal, symbolic, and rwx.

10 secWeb browser
  1. 1

    Set permissions

    Toggle the owner/group/other rwx checkboxes or type an octal (755) or symbolic (rwxr-xr-x) value.

  2. 2

    Add special bits

    Enable setuid, setgid, or sticky bit if needed; the symbolic output updates live.

  3. 3

    Copy the command

    Copy the generated chmod command (with optional -R) — everything is computed locally.

Result: A chmod command and permission breakdown

Frequently Asked Questions

Yes — it correctly renders 4-digit special bits including s, S, t, and T.

The calculator handles full 4-digit permissions: setuid (4000), setgid (2000), and the sticky bit (1000), rendering the correct symbolic semantics (s vs S, t vs T) depending on whether execute is set — an edge most checkbox-only tools get wrong.

No — permission math runs entirely in your browser with no server.

There is nothing to upload: a browser cannot chmod a real file, so this is a calculator and command generator that runs as pure bitwise math locally, fully offline, with no tracking.

644 is read/write for owner and read-only for others; 755 adds execute for everyone.

644 (rw-r--r--) suits regular files like documents and config; 755 (rwxr-xr-x) adds the execute bit, which directories and scripts need. The tool labels common presets like these to help you choose.

Detailed Explanation

Methodology

How the Chmod Calculator Works

AnyTool keeps three representations of a permission in sync — octal (e.g. 755), the symbolic stat string (rwxr-xr-x), and a 3x3 rwx checkbox grid for owner/group/other — recomputing all of them with pure bitwise math whenever any one changes. It supports full 4-digit permissions (setuid 4000, setgid 2000, sticky 1000) and renders the correct symbolic semantics (s vs S, t vs T) based on whether execute is set, then emits a copy-ready chmod command with an optional recursive -R flag.

  • Octal, symbolic, and rwx grid stay synchronized in real time
  • Full special-bit support: setuid, setgid, sticky (4-digit)
  • Correct s/S and t/T symbolic rendering by execute state
  • Copy-ready chmod command with optional -R
  • Plain-English explanation with world-writable warnings
Privacy & Security

Privacy and Offline Use

A browser cannot chmod a real file, so this is a calculator, explainer, and command generator — there is nothing to upload. All conversion is in-memory bitwise math that runs offline with no tracking, unlike the ad-heavy converter hubs (8gwifi, binarytranslator) that dominate the category.

Chmod Calculator: AnyTool vs typical tools
CapabilityAnyToolTypical tools
Octal / symbolic / grid syncAll three, liveOften partial
Special bits (setuid/sticky)YesOften missing
Copy-ready commandYes (+ -R)Varies
Dark mode + mobile-firstYesRare
Privacy / offlinePure local mathOften ad-heavy hubs

Capabilities reflect the live AnyTool tool; competitor behavior varies by service.