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Download OpenSSL for Windows (64-bit)

Prebuilt Win64 installer for Windows 10 and 11 from Shining Light Productions. Verify the SHA256 hash before running — instructions below.

Always verify the SHA256 hash before running the installer. If it does not match the value on slprowex.com, delete the file and re-download.
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OpenSSL 4.0.0 Win64 installer

OpenSSL 4.0.0 — Windows 64-bit
ClocX160_x64.exe  |  Win10/11  |  Free
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Direct mirror — slprowex.com (no captcha)
File details
FilenameWin64OpenSSL_Light-4_0_0.exe
VersionOpenSSL 4.0.0
Size~5 MB (Light)
OSWindows 10, Windows 11
Sourceslprowex.com
✓Verify hash first ✓No adware ✓Win10 / Win11 ✓Free
Safety

Verify before running

Open Command Prompt in your Downloads folder and run:

cmd.exe
C:\Downloads> certutil -hashfile Win64OpenSSL_Light-4_0_0.exe SHA256
SHA256 hash of Win64OpenSSL_Light-4_0_0.exe:
a3f8c2d19b74...
CertUtil: -hashfile command completed successfully.

Compare the output to the hash published on slprowex.com. Full guide with PowerShell alternative: Verify Hashes.

Compatibility

Compatibility notes

  • Requires Windows 10 or Windows 11 (64-bit).
  • May require the Microsoft Visual C++ Redistributable x64. Install it if you see libcrypto.dll errors after setup.
  • Light build (~5 MB): core binaries and DLLs only — enough for command-line use.
  • Full build (~100 MB): adds header files, static libraries and documentation. Use this for software development.
  • For 32-bit Windows, download the Win32 build directly from slprowex.com.
After install

Next steps

  • 1

    Add to PATH

    Add C:\Program Files\OpenSSL-Win64in to your Windows PATH. Full guide: Add to PATH.

  • 2

    Open a new terminal and confirm

    cmd.exe — new window
    C:\> openssl version
    OpenSSL 4.0.0 6 Jun 2025
  • 3

    If you see a DLL error

    Visit Fix libcrypto.dll error for step-by-step solutions.

FAQ

Frequently asked questions

Is this an official OpenSSL installer?
No. This site links to the prebuilt installer from Shining Light Productions (slprowex.com), a well-known third-party Windows build. Always verify the SHA256 hash before running.
Light vs Full — which should I download?
Use Light for running openssl commands from the terminal. Use Full if you are developing software that links against OpenSSL and needs header files and static libraries.
Do I need to uninstall an older version first?
The installer can run over an existing installation. For a clean upgrade, uninstall the previous version first via Settings → Apps, then install the new version.
I get libcrypto.dll was not found after installing
The PATH is not set or the VC++ Redistributable is missing. See Fix libcrypto.dll.

Related guides

Verify Hashes →
check SHA256 first
Add to PATH →
run from any terminal
Fix libcrypto.dll →
DLL errors