
Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Lovable
BASE44
replit
v0
Cursor
Tempo Labs
AI Driven Development
Build custom apps with AI assistance using Shakespeare, an open-source development environment.
Which is more popular?
Shakespeare.diy might be a bit more popular than Cert Decoder. We know about 1 link to it since March 2021 and only 1 link to Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | certdecoder.com | shakespeare.diy |
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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.
No description of Shakespeare.diy yet.
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 Cert Decoder and Shakespeare.diy.
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 Cert Decoder and Shakespeare.diy. 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
But you get full ownership and privacy in return. AGPL licensed, self-hostable. Try it: https://shakespeare.diy Source: https://gitlab.com/soapbox-pub/shakespeare. - Source: Hacker News / 8 months ago