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libssl-1_1.dll

Updated: Files Available: 673
Verified Metadata AI Analysis x86 (32 bit) x86-64 (64 bit)

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

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DLL Overview

Last Updated
Dec 24th, 2025
Filename
libssl-1_1.dll
Company
The OpenSSL Project, https://www.openssl.org/
Product
The OpenSSL Toolkit
Description
OpenSSL library
Architecture
x86 (32 bit) x86-64 (64 bit)
Metadata Consensus
570/673 Files 84.7%
Higher percentages indicate stronger agreement across versions. View available versions or browse repository metadata to compare differences between variants.

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About libssl-1_1.dll

libssl-1_1.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 libssl-1_1.dll?

libssl-1_1.dll is part of the OpenSSL 1.1.x library series, developed by The OpenSSL Project. It provides the SSL/TLS implementation used for secure network communications in countless applications, tools, and embedded systems.

This DLL contains the core SSL/TLS protocol logic, cryptographic handshake routines, certificate processing, and secure session management necessary for encrypted client–server communication.

What libssl-1_1.dll Does

libssl-1_1.dll implements the SSL/TLS layer needed by applications to establish secure connections. It provides features including:

  • TLS 1.0–1.2 handshake and encryption support (depending on the build)
  • Certificate validation and key exchange
  • Session negotiation, resumption, and shutdown
  • Support for various ciphersuites and cryptographic algorithms
  • Secure transport wrappers for network sockets

It works together with libcrypto-1_1.dll, which provides the low-level cryptographic functions used internally by OpenSSL.

Where libssl-1_1.dll Is Found

Applications that embed OpenSSL ship this DLL themselves. Typical locations include:

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

It is not included with Windows by default — it must be distributed by the application.

Why Applications Need This DLL

Programs depend on libssl-1_1.dll to:

  • Establish HTTPS or other encrypted connections
  • Authenticate servers and clients using certificates
  • Protect data transmitted over networks
  • Provide secure sockets in cross-platform applications
  • Enable encrypted APIs, login systems, or secure file transfers

If the DLL is missing, applications cannot perform encrypted communications.

Common Errors Related to libssl-1_1.dll

libssl-1_1.dll was not found.

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

Failed to load OpenSSL library: libssl-1_1.dll.

OpenSSL initialization error.

These errors usually occur when:

  • The application folder is incomplete
  • libssl-1_1.dll or libcrypto-1_1.dll is missing or mismatched
  • The wrong 32-bit or 64-bit build was installed
  • A different OpenSSL version is required (1.1.0 vs 1.1.1, etc.)
  • Antivirus removed or blocked the file

How To Fix libssl-1_1.dll Issues

1. Restore the DLL to the Application Directory

Place the DLL beside the application executable:

<ApplicationFolder>/

Most software loads OpenSSL from its local directory.

2. Match the Correct Architecture

  • 64-bit applications require 64-bit libssl-1_1.dll.
  • 32-bit applications require 32-bit libssl-1_1.dll.

3. Ensure libcrypto-1_1.dll Is Also Present

OpenSSL requires both runtime libraries together.

4. Reinstall or Repair the Application

This ensures that the correct OpenSSL build is restored.

5. Restore From Antivirus Quarantine

Security heuristics sometimes flag cryptographic DLLs.

Manual Install Instructions

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

1. Place the DLL Next to the Application Executable 

<ApplicationFolder>/

Or into the folder where the program stores its runtime libraries.

2. Include libcrypto-1_1.dll

The OpenSSL SSL library depends on its crypto counterpart.

3. Restart the Application

The OpenSSL libraries load at process startup.

Summary

libssl-1_1.dll is the OpenSSL SSL/TLS runtime library used by applications to create secure, encrypted network connections. It works alongside libcrypto-1_1.dll and is distributed by the application itself rather than Windows.

Restoring the correct OpenSSL version to the application directory or reinstalling the software usually resolves missing-DLL 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 libssl-1_1.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 libssl-1_1.dll was not found. Re-installing the application may fix this problem.
libssl-1_1.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 libssl-1_1.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\libssl-1_1.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\libssl-1_1.dll"

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

    regsvr32 libssl-1_1.dll

How to Install libssl-1_1.dll

To install libssl-1_1.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\libssl-1_1.dll

Place 32-bit DLL files in:

C:\Windows\SysWOW64\libssl-1_1.dll

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

C:\path\to\exe\libssl-1_1.dll

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