
Thomas Was Alone
Celeste
Momento Temporis: Light from the Deep
N++
Owlboy
Planet of the Eyes
Environmental Station Alpha
A platformer about a boy's journey to climb a giant tower

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 | fossilecho.com | certdecoder.com |
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| Listed in |
In their own words, as submitted to SaaSHub.


No description of Fossil Echo 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
Walkthroughs and reviews on video.
Fossil Echo - Quick Game Review
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Fossil Echo 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 Fossil Echo 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 Fossil Echo since May 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
When comparing Fossil Echo and Cert Decoder, you can also consider the following products.

Thomas Was Alone is a Wonderful, 2D, Casual, Minimalist, Puzzle-Platform, Atmospheric, Sci-fi, Adventure, and Single player video game created and published by Bithell Games.
Compare Thomas Was Alone to Fossil Echo or Cert Decoder:

Celeste is a platforming video game by Canadian video game developers Matt Thorson and Noel Berry.
Compare Celeste to Fossil Echo or Cert Decoder:
A massive 2D, pixel-art, metroidvania style, platformer.
Compare Momento Temporis: Light from the Deep to Fossil Echo or Cert Decoder:

N++ is a Puzzle-Platform and Single-player video game that takes place in the 2D world, developed by Metanet Software, Inc.
Compare N++ to Fossil Echo or Cert Decoder:

Owlboy is an Adventure, Shooting, Strategy, single-player action-arcade video game for many platforms.
Compare Owlboy to Fossil Echo or Cert Decoder:

Planet of the Eyes is an Action-Adventure, Side-Scrolling, Puzzle-Platform, and Single-player video game developed and published by Cococucumber.
Compare Planet of the Eyes to Fossil Echo or Cert Decoder: