Check OpenSSL Version on Linux, macOS, and Windows

Checking the OpenSSL version tells you which command-line release your system finds first, along with its build details. You need a terminal or command prompt; the result can help diagnose compatibility issues, but it may not identify every OpenSSL library used by other applications.

Formula

This page’s calculator displays the version string you enter; it does not infer or verify an installed version. The result is:

OpenSSL version result = version output

• v is the version output, entered as text. For example, enter the complete first line printed by openssl version, such as OpenSSL 3.0.0 7 Feb 2023.
• result is the same text. The calculator is a reference for recording or copying the command’s output; use the terminal steps below to obtain it.

Worked Example

Using the default input, 3.0.0:

1. Set v = 3.0.0.
2. Apply the formula: result = v.
3. The displayed result is 3.0.0.

For a real check, do not type the default into the calculator and treat it as detected software. Run the command on the computer you want to inspect and read its output.

What You’ll Need

• Access to a terminal: Terminal on macOS, a shell such as Bash on Linux, or Command Prompt or PowerShell on Windows.
• OpenSSL installed and available on your command search path, or the full path to its executable.
• If checking an application rather than the command-line tool, the application’s own documentation or version-reporting method. It might use a separate OpenSSL library.

Step-by-Step

1. Open a command window. On Linux, open your usual terminal. On macOS, open Terminal. On Windows, try PowerShell or Command Prompt. You generally do not need administrator privileges just to check a version.
2. Ask the system which executable it will run. On Linux or macOS, enter command -v openssl. In Windows Command Prompt, enter where openssl. In PowerShell, use Get-Command openssl. If a path is returned, it identifies the command found through your current search path. More than one result can mean multiple installations.
3. Print the version. Enter openssl version and press Enter. The usual output starts with OpenSSL followed by a version number, sometimes with a release date or build information. Record the full line if you are sharing it for troubleshooting.
4. Check detailed build information if needed. Run openssl version -a. This commonly prints the version, build date, platform, compiler options, and directories used for configuration or certificates. Details vary by build. Avoid posting the entire output publicly if it includes paths or other environment details you consider private.
5. Check a particular executable when multiple copies exist. Use the path from the command-location step, in quotes if it contains spaces. For example, on Windows run & 'C:\Path\To\openssl.exe' version in PowerShell, substituting the actual path. In a Unix-like shell, run /full/path/to/openssl version. This checks that file rather than whichever copy is found first.
6. Compare the result with the software you care about. If an application reports its own OpenSSL details, use that report for the application. A system command can be a different build from a library bundled inside an application, container, Python environment, or other package.

Common Mistakes

• Confusing OpenSSL with a similarly named tool. openssl version checks OpenSSL, not every TLS library or command-line utility. For example, a program may use another cryptographic library altogether.
• Assuming the first result represents every installation. Your search path determines which executable runs. A package manager, software installer, or manually added directory can change that order.
• Reading only the major version. Record the full version line, including any suffix, because patch releases and vendor-specific builds can differ.
• Treating the version string as a complete security assessment. A version alone does not establish whether security fixes were backported, whether a package is maintained, or which library a particular application loads.
• Using the wrong shell syntax. PowerShell, Command Prompt, Bash, and other shells have different ways to locate and run a specific file. Use the command appropriate to your shell.

Tips

• Copy and paste commands exactly, without adding quotation marks around openssl version.
• Run the check in the same environment as the software you are diagnosing. A container, virtual machine, remote host, or subsystem can have a different installation from your desktop.
• Use openssl version -a when support staff need build details, and share only the relevant lines.
• If an update is needed, use the operating system or package manager’s supported update process. Avoid downloading an executable from an unfamiliar source.
• After changing your path or installing a new copy, open a fresh terminal and check the executable location and version again.

Troubleshooting

“Command not found,” “not recognized,” or a similar message: OpenSSL may not be installed, or its executable directory may not be on the search path. Check whether your operating system or development environment provides it. If already installed, locate the executable and run it by its full path. Avoid changing system-wide paths unless you understand the effect on other programs.

The command returns an unexpected version: Run the location command and inspect every result. You may have multiple copies, and the first one in the search path is typically selected. Run the intended copy by its full path, then adjust the path or remove an obsolete installation only if appropriate for your setup.

“Error while loading shared libraries” or a missing DLL message: The executable may be present but unable to find a required library, or it may not match your operating system environment. Use a compatible package from a trusted system source, and avoid copying random DLL or library files into the program folder.

Your application shows a different version: This can be normal. The application may bundle its own OpenSSL build or load a library from a different directory. Consult its own diagnostics and documentation, and check the application’s runtime environment rather than relying only on the system command.

The command works in one terminal but not another: Different shells, users, remote sessions, or launch methods can have different search paths. Run the location command in the affected terminal and compare its environment with the working one.

Frequently Asked Questions

What command checks the OpenSSL version?
Run openssl version in a terminal or command prompt. Use openssl version -a for additional build details.

Does this command install or update OpenSSL?
No. It only runs an existing OpenSSL executable. Installation and updates depend on your operating system and package manager.

Why does OpenSSL say the command is not found?
It is not installed in that environment, or its executable directory is not on the search path. Locate the installation or install it from a trusted source appropriate for your system.

Can I check the OpenSSL version used by a website?
Not reliably with this local command. It reports the OpenSSL executable on your computer, not necessarily the server’s software or its TLS configuration.

Does the version command show whether OpenSSL is secure?
No. It identifies a version and possibly build details. Security status depends on the exact build, vendor updates, configuration, and how the software is used.

What is the difference between version and version -a?
version gives a concise version line. The -a option adds build and configuration details that can help identify which installation you are checking.

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in v | OpenSSL version output | - | 3.0.0 | -
out result | OpenSSL version | - | v | 0