{"id":1886,"date":"2024-01-25T06:04:00","date_gmt":"2024-01-25T06:04:00","guid":{"rendered":"https:\/\/certera.com\/kb\/?p=1886"},"modified":"2026-07-20T11:07:30","modified_gmt":"2026-07-20T11:07:30","slug":"how-to-manually-create-a-csr-certificate-signing-request-using-openssl","status":"publish","type":"post","link":"https:\/\/certera.com\/kb\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\/","title":{"rendered":"How to Manually Create a Certificate Signing Request Using OpenSSL?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">TL;DR<\/h2>\n\n\n\n<p class=\"quote-section wp-block-paragraph\">A <strong>Certificate Signing Request (CSR)<\/strong> is a file that contains your website&#8217;s public key and identifying information, such as the domain name and organization. Once created, send the CSR to a <strong>Certificate Authority (CA) or SSL Provider<\/strong> when requesting an SSL\/TLS certificate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Key Takeaways:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A Certificate Signing Request (CSR) is required to obtain an SSL\/TLS certificate from a Certificate Authority.<\/li>\n\n\n\n<li><strong>There are 2 ways to create a CSR:<\/strong> Using OpenSSL (Manually) or using a <a href=\"https:\/\/certera.com\/ssl-tools\/csr-generator\">CSR Generator Tool<\/a> (Automated)<\/li>\n\n\n\n<li>OpenSSL is the most widely used command-line tool for generating CSRs and private keys.<\/li>\n\n\n\n<li>A CSR includes your public key and certificate details, but <strong>never<\/strong> your private key.<\/li>\n\n\n\n<li>Keep the generated private key secure and back it up, as it is required when installing your SSL certificate.<\/li>\n\n\n\n<li>Verify that the Common Name (CN) or Subject Alternative Names (SANs) in the CSR match the domains you want to secure.<\/li>\n\n\n\n<li>You can generate a CSR using an existing private key or create a new key during the process.<\/li>\n\n\n\n<li>Before submitting the CSR, review its contents to ensure the information is accurate.<\/li>\n\n\n\n<li>Once your Certificate Authority issues the certificate, install it using the same private key that was used to create the CSR.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Before exploring the step-by-step instructions to generate a CSR manually using OpenSSL, let&#8217;s analyze and comprehend &#8211; &#8220;<strong>What exactly is OpenSSL?<\/strong>&#8221; Understanding this will help you grasp the process in a better way and widen your knowledge in this respective domain.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/certera.com\/\"><img decoding=\"async\" width=\"960\" height=\"150\" sizes=\"(max-width: 960px) 100vw, 960px\" src=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-ssl-certificates-cta-jpg.webp\" alt=\"Buy SSL Certificates\" class=\"wp-image-2028\" srcset=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-ssl-certificates-cta-jpg.webp 960w, https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-ssl-certificates-cta-300x47.webp 300w, https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-ssl-certificates-cta-768x120.webp 768w\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is OpenSSL?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>OpenSSL is an open-source software library<\/strong>. It offers a commercial-grade and full-featured toolkit for Secure Sockets Layer protocols and is widely employed to shield communications over computer networks against cyber attacks like eavesdropping.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The library also consists of cryptographic library functions that enable encryption and decryption, maintaining privacy and security during data exchanges.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Now that we have some understanding of OpenSSL, let&#8217;s move on to the main topic: creating a CSR manually using OpenSSL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended:<\/strong> <a href=\"https:\/\/certera.com\/kb\/what-is-openssl-useful-openssl-commands-to-work-with-ssl-certificates\/\">What is OpenSSL? Useful OpenSSL Commands to Work with SSL Certificates<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Manually Create CSR Using OpenSSL? [3 Quick Steps]<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here are the steps to manually create CSR using OpenSSL:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 1: Download and<\/strong> <strong>Install OpenSSL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 2: Setup OpenSSL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 3: Generate a Certificate Signing Request<\/strong> using OpenSSL<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s explore each of these steps in-depth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Download and Install OpenSSL<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to download and install OpenSSL on your Windows device:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>Chrome <\/strong>and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The <strong>Chrome <\/strong>browser window will open.<\/li>\n\n\n\n<li>In the URL bar, type <strong>https:\/\/slproweb.com\/products\/Win32OpenSSL.html<\/strong>.<\/li>\n\n\n\n<li>Press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Scroll to the <strong>Download Win32\/Win64 OpenSSL <\/strong>table.<\/li>\n\n\n\n<li>Select and download one of the <strong>non-light editions<\/strong> of the installer.<\/li>\n\n\n\n<li>Double-click the <strong>OpenSSL<\/strong> file.<\/li>\n\n\n\n<li>Follow the default settings to finish the <strong>OpenSSL <\/strong>installation.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Set up OpenSSL<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to setup OpenSSL on your Windows device:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search <\/strong>placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>CMD <\/strong>and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The <strong>Command Prompt<\/strong> window will appear.<\/li>\n\n\n\n<li>Type the <strong>cd \\OpenSSL-Win32 <\/strong>command and press<strong> Enter<\/strong>.<\/li>\n\n\n\n<li>Verify that the line changed to <strong>C:\\OpenSSL-Win32<\/strong>.<\/li>\n\n\n\n<li>Type <strong>set OPENSSL_CONF=c:\\OpenSSL-Win32\\bin\\openssl.cfg <\/strong>command and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li><strong>Restart <\/strong>your <strong>Windows <\/strong>device.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Generate a Certificate Signing Request using Commands<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to generate a code signing request using OpenSSL:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>CMD <\/strong>and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The <strong>Command Prompt <\/strong>window will appear.<\/li>\n\n\n\n<li>In the <strong>Command Prompt <\/strong>window, type <strong>cd \\OpenSSL-Win32\\bin <\/strong>command and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Verify that the line changed to <strong>C:\\OpenSSL-Win32\\bin<\/strong>.<\/li>\n\n\n\n<li>Type the <strong>openssl genrsa -out private-key.key 2048 <\/strong>command and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Type the <strong>openssl req -new -key private-key.key -out csr.txt <\/strong>command and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Enter the required information in the respective fields:<ul><li>In the <strong>Country Name <\/strong>field, type the <strong>two-letter code<\/strong> of the country where the organization is situated.<\/li><li>In the <strong>State <\/strong>field, type the <strong>name of the state<\/strong> where the organization requesting the SSL cert is located.<\/li><li>In the <strong>City or Locality <\/strong>field, type the <strong>name of the city or town<\/strong> where the organization is situated or located.<\/li><li>In the <strong>Company <\/strong>or <strong>Organization <\/strong>field, type the <strong>full legal name<\/strong> of the organization.<\/li><li>In the <strong>Organizational Unit <\/strong>field, type the <strong>department name <\/strong>or organization unit making the request.<\/li><li>In the <strong>Common Name<\/strong> field, type the <strong>Fully Qualified Domain Name<\/strong> that you want to shield.<\/li><\/ul><\/li>\n\n\n\n<li>Verify that a <strong>public\/private key pair<\/strong> is created.<\/li>\n\n\n\n<li>Type the commands given below to move the <strong>private key <\/strong>and <strong>CSR <\/strong>file to a centralized directory, and press <strong>Enter <\/strong>after entering each command:<ul><li><strong>md c:\\certificate<\/strong><\/li><li><strong>move private-key.key c:\\certificate<\/strong><\/li>\n<li><strong>move csr.txt c:\\certificate<\/strong><\/li><\/ul><\/li>\n\n\n\n<li>The CSR file is ready to use for certificate enrollment.<\/li>\n\n\n<\/ul>\n<p><\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>Alternate Option: <\/strong><a href=\"https:\/\/certera.com\/ssl-tools\/csr-generator\">Save Time with Free Online CSR Generator Tools<\/a><\/p>\n<p><\/p>\n<\/ul>\n<p>\n<\/li>\n<h2 class=\"wp-block-heading\">How to Open the Certificate Signing Request File?<\/h2>\n<p><!-- \/wp:post-content --><\/p>\n<p><!-- wp:paragraph --><\/p>\n<p>Follow the steps mentioned below to open the created code signing request file:<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<p><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/p>\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- wp:list-item --><\/p>\n<li>Type <strong>CMD <\/strong>and press <strong>Enter<\/strong>.<\/li>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- wp:list-item --><\/p>\n<li>The <strong>Command Prompt <\/strong>window will appear.<\/li>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- wp:list-item --><\/p>\n<li>In the <strong>Command Prompt <\/strong>window, type the <strong>notepad c:\\certificate\\csr.txt <\/strong>command and press <strong>Enter<\/strong>. (Change the name of the file in the command.)<\/li>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- wp:list-item --><\/p>\n<li>Notepad will appear with the encoded data needed to enroll for an SSL cert.<\/li>\n<p><!-- \/wp:list-item --><\/ul>\n<p><!-- \/wp:list --><\/p>\n<p><!-- wp:paragraph --><\/p>\n<p>Now, what&#8217;s left is to copy the encoded text and paste it into the required field to proceed with the <a href=\"https:\/\/certera.com\/kb\/ssl-installation\/\">SSL Certificate Installation<\/a>!<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<p><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Quick Summary<\/h2>\n<p><!-- \/wp:heading --><\/p>\n<p><!-- wp:paragraph --><\/p>\n<p>Creating a CSR with OpenSSL is a straightforward and reliable way to request an SSL\/TLS certificate. As long as you use the correct domain information and keep your private key secure, your CSR will be ready for submission to a Certificate Authority and certificate installation within 5-10 minutes.<\/p>\n<p><!-- \/wp:paragraph --><\/p>","protected":false},"excerpt":{"rendered":"<p>TL;DR A Certificate Signing Request (CSR) is a file that contains your website&#8217;s public key and identifying information, such as the domain name and organization. Once created, send the CSR to a Certificate Authority (CA) or SSL Provider when requesting an SSL\/TLS certificate. Key Takeaways: Before exploring the step-by-step instructions to generate a CSR manually<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/certera.com\/kb\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\/\">Read More<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":3273,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50],"tags":[317,318,471],"class_list":["post-1886","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-generate-csr","tag-generate-a-csr-using-openssl","tag-manually-certificate-signing-request-using-openssl","tag-openssl-csr-generation","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>OpenSSL CSR Generation: Create Certificate Signing Request in 5 Minutes<\/title>\n<meta name=\"description\" content=\"Need a CSR for an SSL certificate? 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Learn how to manually create a Certificate Signing Request using OpenSSL with simple commands and expert tips.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/certera.com\/kb\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Base - Certera.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/certeraLLC\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-01-25T06:04:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-20T11:07:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/01\/openssl-csr-creation-commands.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1561\" \/>\n\t<meta property=\"og:image:height\" content=\"1008\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"certerakbdbuser\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@certera_llc\" \/>\n<meta name=\"twitter:site\" content=\"@certera_llc\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"certerakbdbuser\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/\"},\"author\":{\"name\":\"certerakbdbuser\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#\\\/schema\\\/person\\\/c25e1519e333a817f30c805384cba014\"},\"headline\":\"How to Manually Create a Certificate Signing Request Using OpenSSL?\",\"datePublished\":\"2024-01-25T06:04:00+00:00\",\"dateModified\":\"2026-07-20T11:07:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/\"},\"wordCount\":949,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2024\\\/01\\\/openssl-csr-creation-commands.webp\",\"keywords\":[\"Generate a CSR Using OpenSSL\",\"Manually Certificate Signing Request using OpenSSL\",\"openssl csr generation\"],\"articleSection\":[\"Generate CSR\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/\",\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/\",\"name\":\"OpenSSL CSR Generation: Create Certificate Signing Request in 5 Minutes\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-to-manually-create-a-csr-certificate-signing-request-using-openssl\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2024\\\/01\\\/openssl-csr-creation-commands.webp\",\"datePublished\":\"2024-01-25T06:04:00+00:00\",\"dateModified\":\"2026-07-20T11:07:30+00:00\",\"description\":\"Need a CSR for an SSL certificate? 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