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libcrypto-1_1-x64.dll

Updated: Files Available: 803
Recently Updated Verified Metadata AI Analysis x86-64 (64 bit)

Download and install libcrypto-1_1-x64.dll to fix missing or corrupted DLL errors.

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DLL Overview

Last Updated
Jun 4th, 2026
Filename
libcrypto-1_1-x64.dll
Company
The OpenSSL Project, https://www.openssl.org/
Product
The OpenSSL Toolkit
Description
OpenSSL library
Architecture
x86-64 (64 bit)
Metadata Consensus
728/803 Files 90.7%
Higher percentages indicate stronger agreement across versions. View available versions or browse repository metadata to compare differences between variants.

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About libcrypto-1_1-x64.dll

libcrypto-1_1-x64.dll is a DLL file (Dynamic Link Library) used by Windows programs to share code and resources. It allows multiple applications to use the same functions, improving performance and reducing redundancy.

AI-assisted overview · Dec 3, 2025

Overview

What Is libcrypto-1_1-x64.dll?

libcrypto-1_1-x64.dll is the 64-bit cryptographic runtime library from the OpenSSL 1.1.x series, developed by The OpenSSL Project. It provides the low-level cryptographic algorithms and primitives used by many applications, servers, and tools to perform secure operations.

This DLL works together with libssl-1_1.dll, supplying the core cryptographic building blocks required for SSL/TLS, encryption, hashing, certificate handling, and secure randomness.

What libcrypto-1_1-x64.dll Does

libcrypto-1_1-x64.dll contains OpenSSL’s foundational crypto implementation, including:

  • AES, DES, ChaCha20, RSA, ECC, and other algorithms
  • Public-key encryption and decryption
  • Message digests (SHA-2, SHA-3, MD5, etc.)
  • Digital signature generation/verification
  • Key derivation routines
  • Certificate parsing and ASN.1 handling
  • Secure random number generation

Applications load this DLL to perform cryptographic operations required for:

  • HTTPS/TLS connections
  • Encrypted file formats
  • Authentication systems
  • Secure APIs and network protocols

Where libcrypto-1_1-x64.dll Is Found

This DLL is not a Windows system file. It is distributed by applications that rely on OpenSSL.

Typical installation locations include:

<ApplicationFolder>/
<ApplicationFolder>/bin/
Program Files/<Vendor>/<App>/

The x64 suffix indicates it is for 64-bit applications only.

Why Applications Need This DLL

Programs depend on this DLL to:

  • Execute cryptographic operations
  • Support SSL/TLS through OpenSSL
  • Validate certificates and perform secure key exchanges
  • Handle encrypted communications
  • Work with secure hashing and signing

If this DLL is missing, applications may be unable to establish secure connections or perform cryptographic tasks.

Common Errors Related to libcrypto-1_1-x64.dll

libcrypto-1_1-x64.dll was not found.

The program can't start because libcrypto-1_1-x64.dll is missing.

Failed to load OpenSSL library: libcrypto-1_1-x64.dll.

OpenSSL: initialization failed.

These issues typically occur when:

  • The application folder is incomplete
  • The wrong architecture is used (32‑bit vs 64‑bit)
  • The OpenSSL version required by the app is not present
  • Antivirus software removed the file
  • libssl-1_1.dll is missing (these two must match)

How To Fix libcrypto-1_1-x64.dll Issues

1. Restore the DLL to the Application Directory

Most software loads OpenSSL from beside the executable:

<ApplicationFolder>/

2. Match Architectures

This DLL is strictly 64-bit. Using it with a 32-bit app will cause loader errors.

3. Ensure libssl-1_1.dll Is Included

OpenSSL 1.1.x requires both libraries to function.

4. Reinstall or Repair the Application

The installer provides the correct OpenSSL runtime expected by the program.

5. Restore From Antivirus Quarantine

Cryptographic libraries are sometimes flagged by heuristic scanners.

Manual Install Instructions

If you obtained a clean, verified copy of libcrypto-1_1-x64.dll from DLLme, you can reinstall it manually:

1. Place the DLL Next to the Application Executable 

<ApplicationFolder>/

2. Include the Matching libssl-1_1.dll

Both files must belong to the same OpenSSL build.

3. Restart the Application

The OpenSSL engine initializes at startup.

Summary

libcrypto-1_1-x64.dll is the 64-bit cryptographic engine of OpenSSL 1.1.x, supplying encryption, hashing, certificates, and secure random generation for applications. It works together with libssl-1_1.dll to enable encrypted network communication.

Restoring the matching OpenSSL runtime to the application directory or reinstalling the host application typically resolves missing or version‑mismatch issues.

File information is supported by Human Assisted Artificial Intelligence and should be used as a helpful tool. However, it is important to keep in mind that this information may not be up-to-date or entirely accurate.

Troubleshooting DLL Errors

Most errors involving libcrypto-1_1-x64.dll occur because the DLL is missing, corrupted, or outdated. In many cases, reinstalling the related application or replacing the DLL resolves the issue. The steps below cover the most common and reliable ways to fix these errors.

Windows DLL Error Examples

This application has failed to start because libcrypto-1_1-x64.dll was not found. Re-installing the application may fix this problem.
libcrypto-1_1-x64.dll Not Found.

Fixes and Solutions

The first step in resolving DLL errors is to completely uninstall the affected software and reinstall its latest version. We know this does not always solve the problem, which is why DLLme exists. If reinstalling the application does not help, or if you are unsure which app is causing the error, follow the steps below. These are the most common solutions for fixing libcrypto-1_1-x64.dll errors.

  • Repair Windows: Make sure Windows is fully updated, then open Windows Terminal or PowerShell as an administrator (search for “PowerShell” in the Start menu, right-click it, and choose “Run as administrator”). This allows you to repair the Windows component store and run the System File Checker (SFC).

    Repair the Windows component store so SFC can pull clean files:

    DISM /Online /Cleanup-Image /RestoreHealth

    Scan all protected system files and automatically repair problems:

    sfc /scannow
  • Uninstall & Reinstall: On this DLL page, check the Company/Product section to identify the related app, then fully uninstall it. If you plan to continue using it, reinstall the latest version. Be sure to save or back up any important data before uninstalling. Windows or antivirus software may sometimes quarantine DLL files, especially if the DLL is unfamiliar or appears suspicious. Check your antivirus quarantine or logs to determine if this is the cause of your issue.
  • Download the DLL: Download the latest 32-bit or 64-bit version of the DLL directly from our repository using the download button above. Most users will need the 64-bit version, but if you are unsure, or if a 64-bit version is not available, you can install both the 32-bit and 64-bit DLLs. DLLme verifies DLLs that come from our admins, partners, and trusted affiliates. User-uploaded files may be verified later if a trusted source is confirmed.
  • Register the DLL: Most DLL files do not need registration, but some DLLs are COM components and must be registered to work correctly. If registration is required, open Windows Terminal or PowerShell as an administrator.

    Register the DLL (you can also drag the DLL file into the window to automatically fill in its full path): 

    regsvr32 "C:\path\to\libcrypto-1_1-x64.dll"

    If you are registering a 32-bit DLL on 64-bit Windows, use the 32-bit RegSvr32: 

    C:\Windows\SysWOW64\regsvr32 "C:\path\to\libcrypto-1_1-x64.dll"

    Or open Windows Terminal/PowerShell in the DLL’s folder and run: 

    regsvr32 libcrypto-1_1-x64.dll

How to Install libcrypto-1_1-x64.dll

To install libcrypto-1_1-x64.dll, place the DLL file in the appropriate Windows system folder or in the same folder as the application’s .exe file. If you are not sure which version (32-bit or 64-bit) to use, you can safely install both.

On 64-bit versions of Windows, place 64-bit DLL files in:

C:\Windows\System32\libcrypto-1_1-x64.dll

Place 32-bit DLL files in:

C:\Windows\SysWOW64\libcrypto-1_1-x64.dll

Or place the DLL file next to the application’s .exe:

C:\path\to\exe\libcrypto-1_1-x64.dll

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