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How to Check MD5 Checksum of a Downloaded File (Step-by-Step)

Downloading large files, software installers, or ISO images can sometimes result in corrupted data. An MD5 checksum is a unique fingerprint—a long string of numbers and letters—generated by an algorithm based on the file’s contents. By comparing the checksum of the file on your computer with the one provided by the developer, you can ensure the file is identical and untampered.

Here is a step-by-step guide to checking MD5 checksums on Windows, macOS, and Linux. What You Need Before You Start The Downloaded File: The file you want to verify.

The Original MD5 Value: Located on the download page (often listed as MD5, Hash, or Checksum). 1. How to Check MD5 on Windows

Windows has built-in tools, so you don’t need to install third-party software. Method A: Using Command Prompt (certutil)

Open the Start Menu, type cmd, and press Enter to open Command Prompt.

Navigate to the folder where your file is located. For example: cd Downloads.

Type the following command and press Enter:certutil -hashfile your_filename.ext MD5(Replace your_filename.ext with your actual file name).

Compare the resulting string of characters with the MD5 value provided by the source. Method B: Using PowerShell (Get-FileHash)

Right-click the Start Menu and select Windows PowerShell or Terminal. Navigate to your file’s location using cd.

Type the following command and press Enter:Get-FileHash your_filename.ext -Algorithm MD5 2. How to Check MD5 on macOS macOS makes this easy through the Terminal.

Open Terminal (via Applications/Utilities or Spotlight search). Type md5 followed by a space.

Drag and drop the downloaded file from the Finder window into the Terminal window. The path will appear automatically. Press Enter.