SSL Certificate Viewer

View and analyze SSL/TLS certificates to check validity, expiration dates, and certificate chain information.

How It Works

1

Input Certificate Data

Paste your SSL certificate in PEM format or upload a certificate file (.crt, .cer, .pem).

2

Parse Certificate Information

The tool decodes and displays certificate details including validity dates, subject, issuer, and extensions.

3

Analyze Certificate Chain

View the complete certificate chain, trust path, and identify any issues with certificate validation.

Frequently Asked Questions

What certificate formats are supported?

The tool supports PEM format certificates (Base64 encoded with BEGIN/END headers). You can also view DER certificates by first converting them to PEM format.

Can I check if a certificate is valid?

Yes, the tool shows expiration dates, validity periods, and certificate chain information. However, it doesn't perform live revocation checking or domain validation.

Is it safe to upload certificates here?

Yes, all certificate parsing happens locally in your browser. Certificate data is never transmitted to servers or stored anywhere.

What is a certificate chain?

A certificate chain shows the trust path from your certificate up to a trusted root certificate authority (CA). Each certificate in the chain validates the one below it.

Why is my certificate showing as expired?

Certificates have validity periods with start and end dates. If the current date is outside this range, the certificate is considered expired and browsers will show security warnings.

Gerelateerde Tools

AES Bestand & Tekst Encryptor

Geavanceerde AES-encryptietool voor bestanden en tekst met ZIP-ondersteuning. Versleutel meerdere be...

Base64 Decode

Decode Base64 encoded text and data back to its original format for viewing and processing.

Base64 Encode

Encode text and binary data to Base64 format for safe transmission and storage in text-based systems...

CSR Generator

Generate Certificate Signing Requests (CSR) for SSL/TLS certificates with custom subject information...