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Pendekode Sertifikat SSL / X.509

Tempel sertifikat SSL/TLS berformat PEM (-----BEGIN CERTIFICATE-----) untuk membaca Subjek, Penerbit (Issuer), tanggal kedaluwarsa, Subject Alternative Names (SAN), dan algoritma.

Status alatBerjalan di browser Anda
Pratinjau
Or drop a certificate fileatau pilih file
.pem, .crt, .cer · hingga 2.0 MB. Dibaca di browser Anda, tidak pernah diunggah.
Or drop a certificate fileatau pilih file
.der, .cer, .crt · hingga 2.0 MB. Dibaca di browser Anda, tidak pernah diunggah.

This decodes certificate information only. It does not validate trust, hostname, DNS, revocation, or certificate chains.

Hasil

This decodes certificate information only. It does not validate trust, hostname, DNS, revocation, or certificate chains.

Cara kerja

  1. Masukkan data Anda

    Isi nilai yang diperlukan, tempel teks Anda, atau unggah file yang ingin diproses.

  2. Lihat hasil seketika

    Sebagian besar alat diperbarui secara langsung saat Anda mengetik; beberapa menggunakan satu tombol tindakan.

  3. Gunakan hasil Anda

    Salin, unduh, atau bagikan hasil yang dihasilkan — Anda selalu memiliki kendali penuh atas data Anda.

Privasi dan pemrosesan data — Berjalan secara lokal di browser Anda. Alat ini tidak mengunggah data Anda.

Apa itu Pendekode Sertifikat SSL / X.509?

Paste or load a PEM/DER certificate to inspect its subject, issuer, validity period, public key, fingerprint, and common extensions.

PAHAMI CARA KERJA ALAT

How to read an X.509 certificate

Certificate information

The decoder reads fields encoded inside the certificate itself, such as Subject, Issuer, serial number, validity dates, Subject Alternative Names, Key Usage, and Basic Constraints.

Trust is different

A certificate can be decoded without proving that it is trusted for a domain. Trust requires hostname context, a certificate chain, revocation information, and platform trust roots, none of which this local decoder verifies.

Common uses

  • Check when a certificate expires.
  • Inspect SAN entries before configuring TLS.
  • Compare issuer and public key details during debugging.

What is parsed locally

Subject and issuer distinguished names, validity dates, serial number, public key details, common extensions, and the SHA-256 fingerprint are decoded from the certificate bytes.

Certificate parsing notes

PEM text or DER bytes are parsed in your browser to show certificate fields and a SHA-256 fingerprint; the tool does not validate a live TLS connection.

Pertanyaan yang Sering Diajukan (FAQ)

Does this prove a certificate is trusted?

No. It decodes certificate data but does not validate trust, hostname, DNS, revocation, or certificate chains.

Can I load DER certificates?

Yes, DER files can be loaded from your device and parsed locally when they are not malformed.

What is the SHA-256 fingerprint?

It is a digest of the certificate bytes, useful for comparing certificates without sharing the full certificate.

Why can an expired certificate still be decoded?

Decoding only reads the certificate bytes. Expiration affects whether a certificate should be trusted, not whether its fields can be parsed.

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