
Okular
OneNote
xournal
Obsidian
Logseq
Excalidraw
GoodNotes
Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input fr...

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, Xournal++ seems to be a lot more popular than Cert Decoder. While we know about 55 links to Xournal++, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | github.com | certdecoder.com |
| Pricing | — | |
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| Listed in |
In their own words, as submitted to SaaSHub.


No description of Xournal++ 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
Xournal++ is recommended for students, educators, researchers, and anyone in need of a reliable tool for digital note-taking, annotating PDFs, or creating handwritten notes in a digital format.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Xournal++ Digital Inking & PDFs on Linux - IG App Picks
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Xournal++ 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 Xournal++ 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.


Used my laptop, a small wacom tablet, and this program to replace all my engineering notes this semester. No more scanning to upload, re-drawing plots, re-writing equations, printing assignments, or heavy binder to...
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Recommendations tracked on public social media and blogs since March 2021.


I tried a whole bunch of the these apps, and I decided that Xournal++ [1] is better than Rnote for note taking. However, I have used Openboard [2] for teaching online since 2020. I agree that Rnote's smoothing is better, but it's tool... - Source: Hacker News / about 2 years ago
I've been using Xournalpp[1] for many years, highlighting books as I read them, adding in text/hand drawn annotations in whitespaces if necessary. Unlike other PDF readers/annotators, it saves a separate file, so the original PDF is... - Source: Hacker News / over 2 years ago
Currently, I am trying to build a small open source NLP project for which I first find text on a page and then translate it; see the current project state here: https://github.com/PellelNitram/xournalpp_htr. The purpose of this project... Source: almost 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
When comparing Xournal++ and Cert Decoder, you can also consider the following products.

Okular is a universal document viewer based developed by KDE.
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Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
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A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
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Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
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Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
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