
Ghostery
Adblock Plus
AdGuard
BlockBear
NextDNS
Privacy Badger
F*ckOff
1Blocker is a content blocking software that you can rely on to save time and money. Unlike its competitors who use JavaScript to block ads after they have been download, 1Blocker does the contrary. Read more about 1Blocker.

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, 1Blocker seems to be a lot more popular than Cert Decoder. While we know about 35 links to 1Blocker, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | 1blocker.com | certdecoder.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of 1Blocker 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 1Blocker yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
1Blocker for Safari on iOS
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 1Blocker 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 1Blocker 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.


1Blocker was one of the first really good ad blockers on iOS when Apple opened up that functionality on iPhones and iPads, and 1Blocker X is an overhaul optimized for Safari.
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.


I've been using https://1blocker.com for meany years now without issues. It isn't in their comparison list, but looks pretty similar design wise. - Source: Hacker News / 10 months ago
Just adding another alternative that I've been using for years for people to consider - 1Blocker. https://1blocker.com/. - Source: Hacker News / about 1 year ago
1blocker works well for me on iOS, iPadOS and MacOS https://1blocker.com/ If you want to use uBlock Origin on Webkit you can do it with Kagi's Orion browser. https://help.kagi.com/orion/browser-extensions/ublock-origin.html. - Source: Hacker News / over 1 year 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 1Blocker and Cert Decoder, you can also consider the following products.


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Block ads, trackers and malicious websites on all your devices.
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Privacy Badger blocks spying ads and invisible trackers. How is Privacy Badger different from Disconnect, Adblock Plus, Ghostery, and other blocking extensions?
Compare Privacy Badger to 1Blocker or Cert Decoder: