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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, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | boundedself.com | certdecoder.com |
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| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Bounded Self tracks where your energy goes. You log what you did, rate how much it cost you (1-10), and the app shows you patterns over time. Most people know they're tired but can't point to why. This gives you a ledger that shows which tasks, which people, which situations are expensive, and...
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
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
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Bounded Self 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
Bounded Self's answer
This tool was built for Engineers, people who thrive on quantified self, and anyone who has gone in and out of emotional burnout where they know the tools work, but just get caught back up in it again as soon as they find a momentary reprieve.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Bounded Self's answer
Bounded Self is for people who want to focus on their energy. It started as a simple tracking app used to address burnout from the founder and developed into a planning app. Others focus on your mood or journals or even a myopic view of where your energy is going today, but none of them address long term planning or analysis.
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.
Bounded Self's answer
Bounded Self gives you the tracking and budgeting tools to know where your energy is being spent and take control of what job you give the energy. It approaches the Freudian concept of cathexis to a place where we can identify what and who is draining us while ensuring we are actively working towards the goals we want to achieve.
Share your experience with using Bounded Self 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.


Tracking Bounded Self since Apr 2026.
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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