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Get access to your prospects’ phone numbers and email, instantly.

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, Kaspr.io should be more popular than Cert Decoder. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | kaspr.io | certdecoder.com |
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In their own words, as submitted to SaaSHub.


No description of Kaspr.io 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 Kaspr.io yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Find email addresses with Kaspr
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Kaspr.io 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 Kaspr.io 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.


Kaspr is a LinkedIn Chrome extension that helps you to get B2B verified emails, phone numbers, and social media profiles from various sources, including LinkedIn, Sales Navigator, Groups and Recruiter Lite.
On the other hand, Kaspr is a sales prospecting tool that provides verified email addresses and phone numbers for potential leads. It specializes in providing accurate contact information to help sales, recruiters and...
Kaspr.io is a straightforward prospecting tool for sales teams looking to identify new leads at scale.
We have no reviews of Cert Decoder yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Kaspr is the most LinkedIn-native option on this list. The Chrome extension sits on LinkedIn profiles and exports contact data directly — phone numbers, emails, and CRM sync. 120M+ European contacts is their differentiator; US coverage... - Source: dev.to / 5 months ago
^This, the kaspr-privacy.io was registered 3 months ago whereas kaspr.io was registered 4 years ago. That's a tad shady as companies usually use subdomains and not new ones. Source: about 4 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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