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SSL deployment guides, code-signing manuals, FAQs and handy tools to help you request, deploy and operate certificates smoothly.

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Server certificate install guide (Nginx)

The full flow: generate a CSR, build the chain, configure Nginx SSL, and back up.

Server certificate install guide (Apache)

From CSR to preparing files, enabling mod_ssl, vhost config and backup.

Server certificate install guide (Tomcat)

From CSR to a PKCS12/JKS keystore, Connector config and backup.

Deploy a wildcard certificate

The full flow: CSR, DNS validation, deployment, distribution and backup.

Code signing certificate install guide

UKey driver install, token initialization, signing and verifying with DigiCert Utility.

About code-signing timestamping

How timestamping works, the problem it solves, and the recommended server.

Certificate basics

PKI principles, applications, problems solved and certificate authorities.

SSL configuration FAQ

21 common questions — redirects, buying, chains, session handshake and more.

Server certificate install guide (HAProxy)

From CSR to a combined PEM, frontend/backend config and backup.

Server SSL install guide (Load Balancer / SLB)

From CSR to creating the certificate in the console, listener rules and backup.

SHA256 compatibility list

SHA-256 compatibility across operating systems, browsers and web servers.

An API for developers

Request, download and revoke certificates in a few lines of code — embed trust into your product.

POST /v1/certificates
Authorization: Bearer <api_key>

{ "domain": "example.com",
  "type": "DV" }
  • RESTful endpoints & SDKs
  • Webhook event notifications
  • Sandbox test environment
  • Full OpenAPI documentation