
WebKit
Linux kernel
GNU Hurd
Linux-libre
Replicant
Second Life
Google Open Source
XNU is a hybrid kernel combining the Mach kernel with components from FreeBSD and C++

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, XNU seems to be a lot more popular than Cert Decoder. While we know about 49 links to XNU, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | opensource.apple.com | certdecoder.com |
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| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of XNU 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 XNU yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Great News For JAILBREAK: Apple Open-Sourced The iOS (XNU) Kernel
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing XNU 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 XNU 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.


First link when I typed “Apple open source”: https://opensource.apple.com/. - Source: Hacker News / 4 days ago
Not sure if you are aware how Apple treats open source projects. It's a dump and never care approach, look at the "dumpster of compliance" if you don't believe me: https://opensource.apple.com. - Source: Hacker News / 9 months ago
What I’m suggesting more than asking is, when you say that open source has lifted their development burden, it makes it sound like it’s a unidirectional taking. And sure, some might be freeloading. But they also do contribute quite a bit... - Source: Hacker News / about 2 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
When comparing XNU and Cert Decoder, you can also consider the following products.

WebKit is a layout engine designed to allow web browsers to render web pages.
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The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating...
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GNU Hurd (usually referred to as the Hurd) is a computer operating system kernel designed as a...
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Linux-libre is a GNU package that is maintained from modified versions of the Linux kernel.
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Replicant is a distribution of Android that is 100% Free Software.
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Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
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