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Certificate Decoder — X.509 PEM, Chain & CSR Viewer

Decode X.509 certificates, chains and CSRs online. Subject, issuer, SANs, validity countdown, key, usages, extensions and SHA-256 fingerprints. In your browser.

PEM or DER
End-entity certificateNot yet valid

douni.example

Douni Example Ltd

From Valid in 20,605 daysUntil

Subject alternative names

6
dnsdouni.exampledns*.douni.examplednsapi.douni.exampleip192.0.2.10ip2001:db8::10emailadmin@douni.example

Details

Subject
C=JP, ST=Tokyo, L=Shibuya, O=Douni Example Ltd, CN=douni.example
Issuer
C=US, O=Douni Sample Trust, CN=Douni Sample TLS Issuing CA 2
Serial
04:D2:A1:7E:9B:3C:55:F0:E1
Version
v3
Signature
sha256WithRSAEncryption
Public key
EC · P-256 · 256 bits
Key usage
digitalSignature
Extended key usage
serverAuthclientAuth
Basic constraints
CA: FALSE
Subject key ID
B9:DE:28:B5:FC:14:FA:9F:6E:9D:66:9A:3C:C0:87:FE:A3:74:EB:A1
Authority key ID
F1:EA:63:B0:A0:D2:95:07:15:D0:E6:46:29:CD:6D:21:7E:8F:34:D4

Fingerprints

SHA-256
…
SHA-1
…
SPKI SHA-256
…
  • Basic Constraintscritical2.5.29.19
    CA: FALSE
  • Key Usagecritical2.5.29.15
    digitalSignature
  • Extended Key Usage2.5.29.37
    serverAuth
    clientAuth
  • Subject Key Identifier2.5.29.14
    B9:DE:28:B5:FC:14:FA:9F:6E:9D:66:9A:3C:C0:87:FE:A3:74:EB:A1
  • Authority Key Identifier2.5.29.35
    keyid: F1:EA:63:B0:A0:D2:95:07:15:D0:E6:46:29:CD:6D:21:7E:8F:34:D4
  • Subject Alternative Name2.5.29.17
    DNS: douni.example
    DNS: *.douni.example
    DNS: api.douni.example
    IP: 192.0.2.10
    IP: 2001:db8::10
    EMAIL: admin@douni.example
  • Authority Information Access1.3.6.1.5.5.7.1.1
    OCSP: http://ocsp.example.com
    CA Issuers: http://pki.example.com/tls-ca-2.crt
  • CRL Distribution Points2.5.29.31
    http://crl.example.com/tls-ca-2.crl
  • Certificate Policies2.5.29.32
    2.23.140.1.2.2 (Organization Validated)
Issued by the next certificate
Intermediate CANot yet valid

Douni Sample TLS Issuing CA 2

Douni Sample Trust

From Valid in 20,468 daysUntil

Details

Subject
C=US, O=Douni Sample Trust, CN=Douni Sample TLS Issuing CA 2
Issuer
C=US, O=Douni Sample Trust, CN=Douni Sample Root CA R1
Serial
0C:0F:FE:E1:56:00:D0:01
Version
v3
Signature
ecdsa-with-SHA384
Public key
RSA · 2048 bits · e=65537
Key usage
digitalSignaturekeyCertSigncRLSign
Extended key usage
serverAuthclientAuth
Basic constraints
CA: TRUE · pathLen 0
Subject key ID
F1:EA:63:B0:A0:D2:95:07:15:D0:E6:46:29:CD:6D:21:7E:8F:34:D4
Authority key ID
DC:4A:E9:B8:6E:59:E9:E9:07:4E:99:0D:47:BC:F5:E8:92:8B:13:CB

Fingerprints

SHA-256
…
SHA-1
…
SPKI SHA-256
…
  • Basic Constraintscritical2.5.29.19
    CA: TRUE
    pathLen: 0
  • Key Usagecritical2.5.29.15
    digitalSignature
    keyCertSign
    cRLSign
  • Extended Key Usage2.5.29.37
    serverAuth
    clientAuth
  • Subject Key Identifier2.5.29.14
    F1:EA:63:B0:A0:D2:95:07:15:D0:E6:46:29:CD:6D:21:7E:8F:34:D4
  • Authority Key Identifier2.5.29.35
    keyid: DC:4A:E9:B8:6E:59:E9:E9:07:4E:99:0D:47:BC:F5:E8:92:8B:13:CB
  • CRL Distribution Points2.5.29.31
    http://crl.example.com/root-r1.crl
  • Authority Information Access1.3.6.1.5.5.7.1.1
    CA Issuers: http://pki.example.com/root-r1.crt
  • Certificate Policies2.5.29.32
    2.23.140.1.2.1 (Domain Validated)
Issued by the next certificate
Self-issued certificateNot yet valid

Douni Sample Root CA R1

Douni Sample Trust

From Valid in 20,454 daysUntil

Details

Subject
C=US, O=Douni Sample Trust, CN=Douni Sample Root CA R1
Issuer
C=US, O=Douni Sample Trust, CN=Douni Sample Root CA R1
Serial
1A:2B:3C:4D:5E:6F:70:81
Version
v3
Signature
ecdsa-with-SHA384
Public key
EC · P-384 · 384 bits
Key usage
keyCertSigncRLSign
Basic constraints
CA: TRUE
Subject key ID
DC:4A:E9:B8:6E:59:E9:E9:07:4E:99:0D:47:BC:F5:E8:92:8B:13:CB

Fingerprints

SHA-256
…
SHA-1
…
SPKI SHA-256
…
  • Basic Constraintscritical2.5.29.19
    CA: TRUE
  • Key Usagecritical2.5.29.15
    keyCertSign
    cRLSign
  • Subject Key Identifier2.5.29.14
    DC:4A:E9:B8:6E:59:E9:E9:07:4E:99:0D:47:BC:F5:E8:92:8B:13:CB

Decoded: 3

Decoded in your browser. Signatures, trust and revocation are not checked.

Format references

Tool page updated: