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Native email app for email productivity.

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?
Cert Decoder might be a bit more popular than Polymail. We know about 1 link to it since March 2021 and only 1 link to Polymail.
Website, pricing, platforms and company facts side by side.
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| Website | app.polymail.io | certdecoder.com |
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| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Polymail 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
Polymail is recommended for business professionals, sales teams, and marketing specialists who need insights and tools to manage their email communications effectively. It is also suited for teams that require collaborative email functionalities and integration with other business tools.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Best Mailbox Alternative For Mac OSX (Polymail)
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Polymail 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 Polymail 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.


Polymail - This one is a lot like Twobird but with a lot more features. It's a different type of email client. It's really cool, but the Windows version is just a web app. It's available on iOS as well. Source: almost 5 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 Polymail and Cert Decoder, you can also consider the following products.

Airmail is a lightweight and lightning fast mail client for Mac.
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Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
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Mailbird is the best email client for Windows 7, 8 and 10
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Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
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