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SSL Certificate Chain Builder

Paste your server certificate and get the complete chain: the missing intermediate certificates are fetched for you and returned as a ready-to-install PEM bundle.

Certificate Chain Completion

Automatically download and complete the intermediate certificate chain. Use this if your certificate shows as untrusted in some browsers.

How it works

Why the chain matters

Servers must send intermediates

Browsers trust a small set of roots. Your server has to send every intermediate certificate between your certificate and that root.

The classic symptom

A site that works in Chrome on a desktop but fails on Android, in curl or in Java almost always has an incomplete chain.

FAQ

Frequently asked questions

In what order do certificates go?

Your certificate first, then each intermediate in turn. The root itself does not need to be included.

How do I check the result?

Install the bundle and run the SSL checker against your domain: it shows whether the chain is complete and trusted.