Keycloak
authentik
ZITADEL
Authelia
Hanko
AWS Identity and Access Management
Auth0
Single Sign-On for Your Self-Hosted Universe ๐โโฌ๐

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Based on our record, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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VA
VoidAuth
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| Website | voidauth.app | certdecoder.com |
| Pricing | โ | |
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| Listed in |
In their own words, as submitted to SaaSHub.

No description of VoidAuth yet.
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0โ100% relative to the other.

As answered by people managing VoidAuth and Cert Decoder.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTMLโsimple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools canโt even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Share your experience with using VoidAuth and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking VoidAuth since Jan 2026.
Why? Because I built certdecoder.com and couldnโt find a decent place to submit it. So I said screw it โ Iโll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
When comparing VoidAuth and Cert Decoder, you can also consider the following products.

Open Source Identity and Access Management for modern Applications and Services.
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The Identity Infrastructure for Modern B2B SaaS
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Authelia is an open-source authentication server providing SSO and two-factor for your applications running behind NGINX.
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AWS Identity and Access Management enables you to securely control access to AWS services and resources for your users.
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