Method to auto generate .md5 after any file finished download?

Hello users.
Is there some method to automatically generate .md5 for file that just finished downloading? Either through some normal windows method/task scheduler/.bat file/script/etc.... ?
Some 3rd party programs are ok too as long as they are doing only this thing and not much else.

Thing is i usually launch multiple downloads over night and it is kind of painful to manually select all of them at once from different folders and subfolders.

I am using QuickSFV to make manually .md5 for files after download but i thought there could be way to automate that.

Tried wget but sadly couldnt get it working.

Would be perfect if method works for all type of downloads for example standard browsers/FTP-transfering through phone/downloading softwares.

Have anyone some experience with this?
Of course im talking about windows - 10 x64

This batch script will search a set of folders (provided as command-line arguments), and look for new files created in the past 24 hours. Both full and relative path names are supported.

e.g. MD5.bat C:\folder1 D:\folder2 D:\long\path\somewhere\folder4

MD5.bat

Code:

<# :
@echo off
setlocal
set args=%*
powershell -NoProfile Invoke-Expression ([System.IO.File]::ReadAllText('%~f0'))
endlocal
goto :eof
#>

$DaysPast = 1
$Now = Get-Date

if ($env:args -eq $null) {
    Exit
}

$Folders = @()
$FolderName = $null; $token = $false

foreach ($char in $env:args.ToCharArray()) {
    switch ($char)
    {
        '"' {
            if (-not $token) {
                $token = $true
            }
            else {
                $Folders += $FolderName
                $FolderName = $null
                $token = $false
            }
        }
        ' ' {
            if ($token) {
                $FolderName += ' '
            }
            else {
                $Folders += $FolderName
                $FolderName = $null
            }
        }
        default {
            $FolderName += $char
        }
    }
}

if ($FolderName -ne $null) {
    $Folders += $FolderName
}

@(foreach ($Folder in $Folders -ne $null) {
    $NewerFiles = (Get-ChildItem $Folder -File -Recurse | where { $_.LastWriteTime -gt $Now.AddDays(-$DaysPast) }).FullName

    if ($NewerFiles -ne $null) {
        foreach ($File in $NewerFiles) {
            [PSCustomObject]@{
                Time = (Get-Item $File).LastWriteTime
                Filename = $File
                MD5 = (Get-FileHash $File -Algorithm MD5 -ErrorAction SilentlyContinue).Hash
            }
        }
    }
}) | Format-Table

Code:

C:\Users\GARLIN\Downloads\MD5>MD5.bat .

Time                 Filename                                          MD5
----                 --------                                          ---
7/9/2023 8:28:44 PM  C:\Users\GARLIN\Downloads\MD5\MD5.bat             67CC4A133572E6518C4BD80AA493300F
7/9/2023 3:13:01 PM  C:\Users\GARLIN\Downloads\MD5\Untitled3.ps1       A93246D0F1211750D348D0A56BD99876
7/9/2023 12:54:16 PM C:\Users\GARLIN\Downloads\MD5\W10_11StoreApps.bat B4E1962DAD2AFDE5AE5484FD99AD5B12
7/9/2023 12:54:16 PM C:\Users\GARLIN\Downloads\MD5\W10_11StoreApps.ps1 64C1936AA80C98375BF6E775FF07454A

Thanks for answers. Garlin method seems it is almost the thing i need. But i cannot get it to work. I guess i need to put my folder locations either in

$Folders = @()
or
if ($token) {
$FolderName += ' '
Right? i put them there in ' ' and "" () but dunno what is wrong. Launching .bat just shows empty cmd for a couple seconds and i cant see anywhere .md5 created.

Excuse me for beign dumb. What exaclty should i do?
For example i have these folders where download are beign saved:
"D:\DOWNLOADS\BROWSER"
"D:\DOWNLOADS\SOFTDOWNS"

MD5.bat D:\DOWNLOADS\BROWSER D:\DOWNLOADS\SOFTDOWNS

The script's expects to see arguments on the command-line. If you wanted to search the same folders every time, then change this part:

$Folders = @("D:\DOWNLOADS\BROWSER", "D:\DOWNLOADS\SOFTDOWNS")
$FolderName = $null; $token = $false

foreach ($char in $env:args.ToCharArray()) {
switch ($char)
{
'"' {
if (-not $token) {
$token = $true
}
else {
$Folders += $FolderName
$FolderName = $null
$token = $false
}
}
' ' {
if ($token) {
$FolderName += ' '
}
else {
$Folders += $FolderName
$FolderName = $null
}
}
default {
$FolderName += $char
}
}
}

if ($FolderName -ne $null) {
$Folders += $FolderName
}

Change $DaysPast from 1 to whatever value works for you. The idea is not to rescan the same files if you run the script on a normal schedule. While the script really doesn't care how many days back to count, I have no idea how many files (or how large your downloads are) and whether it takes a longer time to finish MD5 calculations.

The point of the script is you asked to scan multiple folders for downloaded files. If you need to generate just one file, then use any one of many command-line MD5 or SFV tools out there.

If you're expecting to have a Windows command magically launch after any random file gets written (via download tool or browser save) -- it doesn't work this way. The only way to implement this is a kernel filter driver which behaves like an anti-virus tool and scans every new file. No one's gonna write that for you.

MD5v2.bat

Code:

<# :
@echo off
powershell -NoProfile Invoke-Expression ([System.IO.File]::ReadAllText('%~f0'))
goto :eof
#>

$DaysPast = 1
$Now = Get-Date

$Folders = @("D:\DOWNLOADS\BROWSER", "D:\DOWNLOADS\SOFTDOWNS")

foreach ($Folder in $Folders -ne $null) {
    $NewerFiles = (Get-ChildItem $Folder -File -Recurse | where { $_.LastWriteTime -gt $Now.AddDays(-$DaysPast) }).FullName

    if ($NewerFiles -ne $null) {
        foreach ($File in $NewerFiles) {
            $MD5 = (Get-FileHash $File -Algorithm MD5 -ErrorAction SilentlyContinue).Hash
            if ($MD5 -ne $null) {
                "$File $MD5"
            }
        }
    }
}