UltraTree

Lightning-Fast Disk Space Analysis for Windows

A powerful PowerShell disk scanner that goes beyond traditional tree-size tools:

Key Features:

• Ultra-fast scanning using USN Journal / MFT enumeration
• Smart 3-stage duplicate detection (Size → xxHash64 → Full Compare)
• Intelligent cleanup suggestions (temp files, logs, cache, old installers)
• Beautiful HTML reports with interactive charts
• Dynamic memory management for handling massive filesystems
• Top folders, file types, and wasted space analysis
• Configurable thresholds and display limits

Built for system administrators, MSPs, and power users who need to understand where disk space is going—fast.

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Installation

From PowerShell Gallery

Install-Module -Name UltraTree -Scope CurrentUser

Manual Installation

# Run as Administrator - installs system-wide (required for NinjaOne/SYSTEM account)
git clone https://github.com/freezscholte/UltraTree.git "$env:TEMP\UltraTree"
Copy-Item -Path "$env:TEMP\UltraTree\Module\src\UltraTree" -Destination "$env:ProgramFiles\WindowsPowerShell\Modules\UltraTree" -Recurse -Force
Remove-Item -Path "$env:TEMP\UltraTree" -Recurse -Force

Import-Module UltraTree -Force

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Quick Start

# Scan C: drive
Get-FolderSizes -DriveLetter C

# Scan all drives with duplicate detection
Get-FolderSizes -AllDrives -FindDuplicates -MaxDepth 5 -Top 50

# Full pipeline - scan, convert, wrap, save as standalone HTML
Get-FolderSizes -AllDrives -FindDuplicates |
    ConvertTo-NinjaOneHtml |
    New-HtmlWrapper -Title "Disk Report" |
    Out-File "DiskReport.html" -Encoding UTF8

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NinjaOne Integration

UltraTree is designed for NinjaOne RMM. Set the HTML report directly to a WYSIWYG custom field:

# Basic - auto-installs if needed
if (-not (Get-Module -ListAvailable -Name UltraTree)) {
    Install-Module -Name UltraTree -Scope AllUsers -Force -AllowClobber
}
Import-Module UltraTree -Force

Get-FolderSizes -AllDrives -FindDuplicates |
    ConvertTo-NinjaOneHtml |
    Ninja-Property-Set-Piped treesize

With Auto-Update

#Requires -Version 5.1
#Requires -RunAsAdministrator

try {
    $moduleName = "UltraTree"
    $installed = Get-Module -ListAvailable -Name $moduleName | Sort-Object Version -Descending | Select-Object -First 1

    if (-not $installed) {
        Write-Output "Installing $moduleName..."
        Install-Module -Name $moduleName -Scope AllUsers -Force -AllowClobber
    }
    else {
        $latest = Find-Module -Name $moduleName -ErrorAction SilentlyContinue
        if ($latest -and $latest.Version -gt $installed.Version) {
            Write-Output "Updating $moduleName to $($latest.Version)..."
            Update-Module -Name $moduleName -Force
        }
    }

    Import-Module $moduleName -Force -ErrorAction Stop

    Get-FolderSizes -AllDrives -FindDuplicates -MaxDepth 5 -Top 50 |
        ConvertTo-NinjaOneHtml |
        Ninja-Property-Set-Piped treesize

    exit 0
}
catch {
    Write-Error "UltraTree failed: $_"
    exit 1
}

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Documentation

Read the Docs | GitHub Docs

• All parameters and options
• Return object structure
• NinjaOne setup guide (custom fields, scripts, scheduling, alerts)
• Configuration reference
• Troubleshooting

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Requirements

• PowerShell 5.1+
• Windows (NTFS drives)
• Administrator privileges for full access

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Author

Jan Scholte

License

MIT License