@echo off

setlocal

set "FILE=input.zip"

set "OUT=output.txt"

powershell -NoProfile -Command ^

  "$bytes = [System.IO.File]::ReadAllBytes('%FILE%');" ^

  "$base64 = [Convert]::ToBase64String($bytes);" ^

  "Set-Content -Path '%OUT%' -Value $base64"

echo Done. Base64 saved to %OUT%

endlocal

$inputFile = "input.txt"

$outputFile = "output.zip"

$base64 = Get-Content $inputFile -Raw

$base64 = $base64 -replace '^data:.*?;base64,', ''

$base64 = $base64 -replace '\s', ''

$bytes = [Convert]::FromBase64String($base64)

[System.IO.File]::WriteAllBytes($outputFile, $bytes)

powershell -ExecutionPolicy Bypass -File .\ConvertBase64TXTtoZIP.ps1