
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, ASP.NET Core should be more popular than Cert Decoder. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | dotnet.microsoft.com | certdecoder.com |
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In their own words, as submitted to SaaSHub.


No description of ASP.NET Core 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.


No analysis of ASP.NET Core yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Intro to ASP.NET Core Razor Pages - From Start to Published
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing ASP.NET Core 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 ASP.NET Core 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.


As for performance, both ASP.NET and Flutter perform really well. For ASP.NET Core, it’s partly due to the lightweight and efficient Kestrel web server. Flutter’s speed is thanks to the Dart VM and Ahead-of-Time (AOT)...
ASP.NET Core is an open-source and cross-platform framework for building modern cloud-enabled web apps on Windows, Mac, and Linux. One unique capability ASP.NET Core introduces relates to scalability. The framework...
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Recommendations tracked on public social media and blogs since March 2021.


However, usage of a C# framework like ASP .NET Core or a Java framework like OfficeFloor are more than capable in the right hands. The key is to understand the tradeoffs of each language and framework, and to choose the right tool for... - Source: dev.to / over 3 years ago
The administration UI is now built on React and ASP.NET Core which means it's fast 🚀! - Source: dev.to / about 4 years ago
Per https://dotnet.microsoft.com/en-us/learn/aspnet/what-is-aspnet-core, "ASP.NET Core is the open-source version of ASP.NET, that runs on macOS, Linux, and Windows. ASP.NET Core was first released in 2016 and is a re-design of earlier... Source: about 4 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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