Certificate Chain Deep Dive

Comprehensive certificate chain validation and CRL revocation analysis.

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Try these examples:

✅ Valid Chain ❌ Revoked Certificate ⚠️ Incomplete Chain

revoked-isrgrootx1.letsencrypt.org

12/11/2025, 3:04:41 am UTC

Certificate Chain Validation

❌ Certificate chain has issues that may prevent browsers from trusting it.

Issues:

  • Certificate 'revoked-isrgrootx1.letsencrypt.org' is REVOKED

Certificate Details

End Entity

Leaf Certificate
Download PEM
Subject: revoked-isrgrootx1.letsencrypt.org
Issuer: R12
Serial (Decimal): 0x0549BA691493288F4986403391A5F926C143
Serial (Hex): 0549BA691493288F4986403391A5F926C143

Valid From: 2025-12-03 17:38:37

Valid Until: 2026-03-03 17:38:36

Signature: RSA-SHA256

Version: 3

CRL Revocation Status:

❌ Certificate is REVOKED (found in CRL)

CRL size: 239495 bytes

CRL URL

http://r12.c.lencr.org/68.crl

Root CA

Download PEM
Subject: R12
Issuer: ISRG Root X1
Serial (Decimal): 0xC212324B70A9B49171DC40F7E285263C
Serial (Hex): C212324B70A9B49171DC40F7E285263C

Valid From: 2024-03-13 00:00:00

Valid Until: 2027-03-12 23:59:59

Signature: RSA-SHA256

Version: 3