
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 | certdecoder.com | callboxee.com |
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| Platforms | — | |
| Company | — | Startup from the United States |
| Listed in |
In their own words, as submitted to SaaSHub.


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.
Your property still stock with that outdated callbox/intercom? We allow you to modernize at no cost with our callbox software that requires no installation from property managers.
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 Cert Decoder and Callboxee.
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.
Callboxee's answer:
The idea was born out of a real, everyday frustration. The problem was obvious but unsolved: gated access systems assumed you’d always be available to answer your phone. Every visit started the same way, a phone call at the gate. Whether I was in a meeting, driving, or simply unavailable, I still had to stop what I was doing just to let someone in. I needed a better solution: a way to create secure, time-limited access codes that visitors could use on their own.
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.
Callboxee's answer:
Our primary audience consists of apartment community managers and gated property owners who use legacy callbox systems and want a modern, streamlined solution for managing access codes and visitor permissions.
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.
Callboxee's answer:
We implement a unique software to help modernize outdated callbox/intercom systems without the cost of a new hardware and installation.
Cert Decoder's answer
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Callboxee's answer:
Purely software implementation at no additional cost to the property.
Share your experience with using Cert Decoder and Callboxee. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


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
Tracking Callboxee since Dec 2025.