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Video Q&A with influencers and experts 🐳

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, Whale should be more popular than Cert Decoder. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | whale.naver.com | certdecoder.com |
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| Listed in |
In their own words, as submitted to SaaSHub.


No description of Whale 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
Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Whale 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 HTML—simple, 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 can’t 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 Whale and Cert Decoder. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Whale helps us a lot with streamlining our onboarding process. Whale just automates the assignment of different onboarding documents. We just add a new hire to a group, and the system does the rest for us.
It’s very manual to install the suggestions. Once everything is installed, it’s ep-ic but it can take some time so don’t wait long to do it. Start while you’re creating your documentation in Whale.
It's VERY customizable! You can add your own search engine, customize colors, and more!
We have no reviews of Cert Decoder yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Might check out Naver Whale and Yandex Browser. Source: over 3 years ago
Why not use it - https://whale.naver.com/en/. Source: over 3 years ago
I would NEVER use anything else than Firefox as my main browser. HOWEVER, I'm always looking for a secondary browser that I can use for a quick consult or managing my router settings quickly without wasting too much RAM in the process.... Source: over 3 years ago
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
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