Question 1

How does this decoder parse certificates without a backend?

Accepted Answer

The tool utilizes a pure client-side binary ASN.1 engine. It decodes the Base64 X.509 DER structure entirely in your browser memory and hashes the certificate via Web Crypto with 100% privacy.

Question 2

What certificate file formats can I inspect?

Accepted Answer

You can paste or upload PEM, CRT, CER, and TXT files. The engine automatically handles line endings (CRLF/LF), trailing spaces, and standard X.509 headers.

Question 3

Can I inspect live domain certificates directly?

Accepted Answer

Yes. By entering any live domain name, the inspector queries the host over port 443 with SNI via a free public edge proxy to fetch and inspect the public SSL certificate.

Question 4

Is my certificate data safe?

Accepted Answer

Yes. All PEM parsing is performed locally in client-side memory. No private keys are ever requested or transmitted.

SSL Certificate Decoder & Inspector

Frequently Asked Questions

Related Network & Diagnostic Tools