Leaf Certificate (PEM format)
What is a Certificate Chain?
X.509 certificate chains are used in SSL/TLS to establish trust between a website's certificate and a trusted root certificate authority. This tool automatically builds the complete certificate chain by extracting Authority Information Access (AIA) extension URLs from your certificate and fetching intermediate certificates until it reaches the root CA.
How to Use the Certificate Chain Builder
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Paste your PEM-encoded certificate (-----BEGIN CERTIFICATE----- format) into the input field.
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Click the "Build Chain" button to automatically fetch intermediate certificates.
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The tool will parse your certificate, extract the AIA extension URLs, and fetch issuer certificates automatically.
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View the complete certificate chain with details like subject, issuer, validity dates, and signature algorithms.
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Each certificate is displayed with validity information and a visual status indicator.
Keywords: certificate chain builder, X.509 certificate chain, SSL certificate chain, TLS certificate chain, intermediate certificate, certificate authority, AIA extension, build certificate chain