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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, FLATHUB seems to be a lot more popular than Cert Decoder. While we know about 200 links to FLATHUB, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | flathub.org | certdecoder.com |
| Pricing | ||
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of FLATHUB 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
Flathub is particularly recommended for Linux users who want a straightforward and secure way to install and update applications. It's especially beneficial for those who use multiple distributions or want to ensure their software is up-to-date without dependency issues.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Install Linux Apps With Flathub & Flatpak
No Cert Decoder videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing FLATHUB 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 FLATHUB 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.


GUI apps often come in Flatpak these days - which are sandboxed[1] like you are expecting. [1] https://docs.flatpak.org/en/latest/basic-concepts.html#sandboxes - https://flatpak.org/ - https://flathub.org/en. - Source: Hacker News / 8 months ago
1. You can configure the keyboard shortcuts in KDE. Or use something like Toshy: https://github.com/RedBearAK/Toshy 2. KDE Autostart 3. KDE Discover. Supports flatpak for example: https://flathub.org/en 4. SysD Manager... - Source: Hacker News / 11 months ago
There are a lot of third-party Linux apps built with GTK4/Libadwaita. If you just to to https://flathub.org and click on random apps a lot of them will use GTK. - Source: Hacker News / over 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
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