KB Hash Verifier

Verify the integrity of Microsoft Windows Update files

📁 Drag and drop your update file here, or click to browse

Select the algorithm shown on the Microsoft Update Catalog page

Copy the hash from the catalog download page

📖 How to Use
  1. Go to the Microsoft Update Catalog
  2. Search for and download your update file
  3. Click "Download" to see the hash values
  4. Copy the Base64 hash string (after "SHA-1:" or "SHA-256:")
  5. Select your downloaded file here
  6. Paste the hash and click Verify

Important: If the hash doesn't match, DO NOT install the update.