NERD IP info

Detects IPv4 addresses on web pages, queries the CESNET NERD API, and displays results in an interactive popup.

As of July 2026, NERD IP info has users in the Productivity category.

Usersno change0%
Ratingno change0%
— reviews
Reviewsno change0%
Version
1.0.0
Manifest V3

History

1 snapshots

Tracking since Jul 4, 2026.

Not enough history yet for this metric — the chart fills in as we collect more snapshots.
View as table
DateUsersRatingReviewsVersion
Jul 4, 20261.0.0
Now1.0.0

Permissions & access

Permissions
storagecontextMenusactiveTabscripting
Host access
<all_urls>

Screenshots

NERD IP info screenshot 1NERD IP info screenshot 2NERD IP info screenshot 3

About

Instantly identify, analyze, and evaluate IP addresses on any web page using the NERD database.
NERD IP Info is a tool designed for everyone with interest in network security. It automatically scans the text of the websites you visit, detects IPv4 addresses, and gets their reputation, threat category, and other useful info directly from CESNET's Network Entity Reputation Database (NERD).
Stop copying and pasting IP addresses manually. Get critical network insights seamlessly integrated into your browsing workflow.
Key Features:
-- Automatic detection: Instantly identifies IP addresses within the text of any web page
-- One click lookup: click the NERD icon next to an IP to open a popup with a full reputation report
-- Right click search: select any text on a page, right-click, and choose "Search using NERD"
-- Page scan: scan every IP visible on the current page and see each one color-coded by reputation
-- Raw JSON copy: copy the complete API response to your clipboard.
-- Recent history
-- Site Blocklist/Allowlist: customize which sites the extension works on 

Required setup
A free CESNET NERD API key is required. It is stored only in your browser's local storage.
To get the API key, you currently need to manually ask for an account. Visit https://nerd.cesnet.cz/ for more information.

Privacy & security
-- No Tracking: This extension does not track your browsing history or collect personal data.
-- Local Storage: Your API token is stored safely and locally on your device using Chrome's secure storage
-- No browsing history, page content, or lookup data is transmitted anywhere except to NERD for the reputation lookups you explicitly request.
-- Recent lookups and cached, reputation data are kept on your device and can be cleared at any time from the options page.

Technical

Version
1.0.0
Manifest
V3
Size
57.0KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
nhknldbhhggflmkfdkgmjldbnpmeelei
Developer ID
u8ab5b232ef5a17a6470cc6593def4892
Developer Email
[email protected]
Created
Jul 3, 2026
Last Updated (Store)
Jul 3, 2026
Last Scraped
Jul 4, 2026
Website
Support URL

Data sourced from the Chrome Web Store · last verified Jul 4, 2026.