Certificate Decoder - Decode certificates to view their contents

About Certificate Decoder - Decode certificates to view their contents

Certificate Decoder

Decode the information included in your PEM-encoded SSL certificate with the help of this Certificate Decoder, and make sure that the decoded information is accurate. A certificate that has been PEM encoded is a block of encoded text that contains all of the information about the certificate as well as the public key.

To view the information contained in a certificate on a Windows computer, simply double-click the file that contains the certificate. This is an additional straightforward method. Copy the text of your certificate and paste it into the box below; the Certificate Decoder will handle the rest of the processing.

This certificate viewer is at your disposal. The text "——-BEGIN CERTIFICATE——-" and "——-END CERTIFICATE——-" should appear at the beginning and end of your certificate, respectively. After you have completed the SSL installation on your server, you may use the SSL Checker to validate that the SSL certificate was successfully installed.

Execute the following command in OpenSSL on your personal computer in order to decode any certificates:

openssl x509 -in certificate.crt -text -noout is the command that should be used.

The private key that corresponds to the public key contained in a CSR is used to sign a CSR document. By doing this check, you can ensure that the signature on the CSR is legitimate. A signature that is invalid suggests that the CSR has been altered after it was initially generated, or that the public key contained inside the CSR does not correspond to the private key that was used to sign it.

What does the Certificate Decoder provide?

This check determines whether or not the name of the CSR contains a field that has no value. For instance, the CSR Decoder would provide a warning regarding the name that is provided below due to the fact that the location field is available, but it does not have a value.

CN=www.acme.com, O=acme, L=, and C=gb respectively.

This warning is necessary because some certification authorities (CAs) have the ability to reject CSRs that contain fields with empty values.

Performs tests to determine whether weak RSA keys were created by systems based on Debian. It makes use of the dowkd blacklist, which may or may not be comprehensive.

This page contains CSRs and certificates that use keys that are already known to be weak. In the event that it fails to identify a CSR or certificate that you are aware to have a weak key, kindly inform us.

In May of 2008, the Debian team made the announcement that Luciano Bello had found a vulnerability in the OpenSSL package that was distributed by Debian. The result of this was that any SSL and SSH keys that were created on Debian-based systems (including Ubuntu) between September 2006 and May 13th, 2008 were potentially vulnerable to being compromised.

This flaw was discovered and reported by the Debian Security Team in the Debian Security Advisory number 1571. The Debian Wiki is the greatest source of information regarding this vulnerability. Additionally, this topic is covered in our CSR Frequently Asked Questions article.

Verifies that RSA and DSA keys have a minimum of 2048 bits, and that EC keys have a minimum of 224 bits

Decoder for CSRs and Certificates; furthermore decodes PKCS#7 Certificate Chains
The CSR Decoder as well as the Certificate Decoder

Visit the Red Kestrel website to test out our more recent decoder.

Decryption of Certificates

If you get a set of SSL certificates confused with one another, you could run into a lot of trouble. When it comes to managing huge orders, this is actually more simpler than you may think it is. If you install the incorrect SSL certificate on the incorrect server, you won't set the world on fire or anything like that, but you will waste a lot of time and have a lot of headaches.

Or, it's possible that all you're doing is double-checking the validity of the information included on the certificate you were given. Mistakes happen. It is preferable to have this knowledge before installing the certificate as opposed to discovering it after the fact. This is the motivation behind the creation of the Certificate Decoder tool.

The SSL Certificate Decoder program decodes SSL Certificates in an instant, regardless of the format used to store the SSL Certificate (PEM, DER, or PFX encoded SSL Certificates).

It will remove all of the information from your certificate in a speedy and accurate manner and will then give the data in a style that is simple to comprehend.

To use the certificate decoder tool, simply copy and paste your certificate into the form below, and the program will handle the remainder of the decoding process for you.

Each and every SSL Certificate begins with:


...and finish with:


Please take note that there need to consistently be five dashes on either side of both prompts.

Want even more assistance? Use our SSL Checker once you have successfully installed the certificate you just decrypted so that you can confirm that it was installed correctly.

A Handy Hint: It's never a terrible idea to go ahead and confirm that the information on your SSL certificate is valid. In fact, it's always a good idea to do so. It is preferable to get the information now than than discover it later. You are able to re-issue a certificate and generate a new CSR if it turns out that the certificate in question contains inaccurate information.

As always, if you would like to talk to a real, live human being who speaks English, please do not hesitate to get in touch with our helpful team of SSL experts at any time of the day or night through phone or live chat. They are always happy to assist.





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