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The easiest way for travelers to find the best eSIM

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, esimdb seems to be a lot more popular than Cert Decoder. While we know about 205 links to esimdb, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | esimdb.com | certdecoder.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of esimdb 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
Esimdb is particularly recommended for international travelers, digital nomads, and tech-savvy individuals who frequently switch between networks or require flexible connectivity solutions across different countries. It's also useful for those new to eSIM technology who want to compare various service options before committing.
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 esimdb 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 esimdb 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.


How do you judge "the best" network? It normally depends on if you're in the city, countryside, island etc. I travel fulltime and constantly buy new esims. Normally I just go on esimdb and buy the cheapest one. Then when I get to the... - Source: Hacker News / about 2 months ago
Get a esim adapter (ie. Euicc in sim card format), find a plan on https://esimdb.com/, load it onto the esim, and plug it into your iot device. - Source: Hacker News / 11 months ago
eSIM is amazing for purchasing roaming internet while traveling. There is a eSIM aggregator that I can recommend: https://esimdb.com/. - Source: Hacker News / about 2 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
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