Chmod Calculator

Visual generator for Unix file permissions.

Scope
Read (4)
Write (2)
Execute (1)
Owner
Group
Public
chmod 755 filename.txt

Visual Unix permission generator. Generate numeric (755) and symbolic (rwxr-xr-x) modes instantly.

Why This Tool Exists

Unix file permissions are elegant but confusing. Calculating `755` in your head involves binary addition: (4+2+1), (4+0+1), (4+0+1). PrivaQuickTools Chmod Calculator is a visual grid. You check boxes for "Read," "Write," and "Execute" for Owner, Group, and Public. We give you the number and the command string. Prevent security accidents like leaving a config file world-readable (`777`).
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I once accidentally ran `chmod 777` on a web server root to 'fix' a permission error. I got hacked 3 hours later. Use least-privilege permissions like 755 or 644!

Key Capabilities

Core features that make this tool powerful.

Privacy First: Files never leave your device.

Instant: No upload or download wait times.

Secure: Local processing guarantees data safety.

Free: No subscriptions or hidden fees.

How It Works

Understanding the processing logic.

A permission matrix interface: - **Columns:** Owner, Group, Public. - **Rows:** Read (4), Write (2), Execute (1). - **Output:** Octal (e.g., 755) and Symbolic (e.g., -rwxr-xr-x).

Accuracy & Reliability

Standard browser-based processing logic.

Who Is This For?

SysAdmins

Set correct file security on Linux servers.

Web Developers

Fix 'Permission Denied' errors on uploads folders.

Common Mysteries & Fixes

The 777 Trap

Never use 777 (everyone can write) unless you absolutely know why. It is a major security risk.

Execute on Files

Files rarely need the execute bit unless they are scripts/binaries. 644 is standard for text files.

Real-World Scenarios

Quick Processing

Process files without verifying server security.

Offline Work

Use the tool without an internet connection.

Why Choose PrivaQuickTools

FeaturePrivaQuickToolsOthers
Privacy100% LocalCloud Upload
CostFreeFreemium
SpeedInstantSlow Uploads
RegistrationNoneRequired

Privacy & Security Guaranteed

We do not store, view, or upload your files. All processing happens in your browser's memory. When you close the tab, all data is wiped from memory.

Good to Know

Large files depends on your device RAM. Processing massive video/PDFs may be slower on mobile devices.

Benefits

  • Local ProcessingData stays on your machine, always.
  • No InstallationWorks instantly in your browser.
  • Zero Cost100% free and open.
  • UnlimitedNo artificial limits on file count.

When Not To Use

While we aim for perfection, browser-based tools have limits. This tool might not be the best fit for:

  • Extremely large files (e.g., video over 2GB)
  • Batch processing thousands of files at once
  • Workflows requiring server-side collaboration or cloud storage

Frequently Asked Questions

Common questions about this tool.

Owner matches all; Group/Public can only read and execute. Standard for folders.
Owner handles R/W; Group/Public can only read. Standard for files.