Certificate Info

Shows TLS certificate info and validation level of the servers you connect.

What is Certificate Info?

'Certificate Info' is an open-source Chrome extension that provides validation level, expiry and additional information of the SSL/TLS server certificate of visited websites. It extracts certificate info for basic validation but should not be solely relied upon for certificate validation. The extension is designed for privacy, ensuring only hostnames, not full URLs, are processed by the backend API.

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Extension stats

By: blupig.net

View on Chrome Web Store

Users: 3,000+

Rating: 3.90 (20)

Version: 0.2.1 (Last updated: 2020-04-18)

Creation date: 2020-04-17

Risk impact: Moderate risk impact

Risk likelihood: Low risk likelihood

Manifest version: 2

Permissions:

tabs
https://*.blupig.net/

Size: 18.52K

Ranking

# 18014 ▼ 160

Other rankings

#3150 in Developer Tools ▼ 2 #7 in info keyword 19 ▲ 5 #169 in server keyword 51 ▼ 3

Other platforms

Not available on Firefox

Not available on Edge

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Extension summary

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Please read the description carefully before installing:

This is a simple extension that displays the validation level, expiration and more info of the SSL / TLS server certificate of the website you visit to help determine the identity of the server.

CAVEATS:

Due to the limitation of Chrome's extension API, the validation info is fetched and processed by our backend API, which only receives the hostname (not the full URL) you visit. Note that in TLS, hostnames are already sent in plaintext to the server because of SNI, regardless if you use this extension or not. For the same reason, the extension will only be able to display information of hosts available to connect from the public network.
This extension extracts certificate info and performs very basic validation, it should be used as a reference and shouldn't be relied on for certificate validation.
Certificate data is cached for 5 minutes.

This extension is open-source (GPLv3): https://github.com/blupig/certificate-info

Feel free to contribute or submit any feedback on GitHub.

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Great functionality and works well for basic needs.
User-friendly and convenient to use.
Accurate in checking certificate validity.

Cons

Lacks support for IPv6 websites.
Limited information displayed about certificates.
Doesn't pull the actual certificate from Chrome, only what is published on the web.

Most mentioned

Valid-until-date visibility is desired.
Functionality for checking certificate expiration based on color coding is requested.
Users expressed the need for more detailed certificate information.

Recent reviews

IPv6 support is missing. IPv6 website shows error

Max, 2023-03-29

As working as a IT admin specialist, what I would really like to see that icon color would match how quickly certification expires. For example, green color: certificate doesn't expire in 60 days, orange color 30 days, red color 10 days, or something similar. Even better, if experience date would be actually visible all the time without clicking the icon. I would love somebody to implement this my own idea. You heard from me, I would appreciate to be mentioned in the credits.