Certificate Chain Downloader
Enter any website. Get its complete SSL/TLS certificate chain — leaf, intermediates and root — as PEM and DER files in a single zip.
Chain
What's in the zip?
fullchain.pem— leaf followed by every issuer. What nginx, Caddy and HAProxy want.certificate.pem— the leaf certificate alone.chain.pem— intermediates (and root, if present) without the leaf. For Apache'sSSLCertificateChainFileoropenssl verify -CAfile.01-leaf-…,02-intermediate-…, … — each certificate individually, as.pemand binary.cer(double-click to open on Windows or macOS).README.txtandchain-info.json— subjects, issuers, serials, validity, fingerprints and SANs.
Public certificates only. Nothing here can include a private key.