
NextDNS
AdGuard
Blokada
AdBlock
uBlock Origin
SponsorBlock
AdClear
2B+ Android users deserve access to a safer and open Internet.

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, RethinkDNS seems to be a lot more popular than Cert Decoder. While we know about 23 links to RethinkDNS, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | rethinkdns.com | certdecoder.com |
| Pricing | ||
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of RethinkDNS 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
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 RethinkDNS 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 RethinkDNS 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.


RethinkDNS has a very active community with a telegram channel so that you can ask for help.
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.


Rethink DNS can block internet access of an app (besides doing DNS-based blocking, etc.): https://rethinkdns.com It uses the VPN functionality, but you can stack a Wireguard VPN on top of it. - Source: Hacker News / 5 months ago
[2] https://rethinkdns.com - if this is something our users value, and given https://archive.md/slpZ9, we'll donate to support them. - Source: Hacker News / almost 2 years ago
Hi, I've been using RethinkDNS https://rethinkdns.com/ for a few days, and for now it's something quite good for what I've seen so far. Source: over 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 RethinkDNS and Cert Decoder, you can also consider the following products.

Block ads, trackers and malicious websites on all your devices.
Compare NextDNS to RethinkDNS or Cert Decoder:


The best ad blocker for Android. Free and open source.
Compare Blokada to RethinkDNS or Cert Decoder:

Ad blocker for Chrome, Safari and Opera on desktop and Safari for iOS devices.
Compare AdBlock to RethinkDNS or Cert Decoder:

Popular and efficient blocker for Chromium, Chrome, Edge, Firefox, Opera, Safari, Thunderbird.
Compare uBlock Origin to RethinkDNS or Cert Decoder:

SponsorBlock is an open-source crowdsourced browser extension to skip sponsor segments in YouTube videos.
Compare SponsorBlock to RethinkDNS or Cert Decoder: