What does DNS Checker do?

DNS Checker focuses on diagnosing website DNS configuration and network problems from the browser. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is DNS Checker for?

DNS Checker is a consumer product built for web developers and network administrators.

Yes — DNS Checker is free to use.

Is DNS Checker still maintained?

Unverified. DNS Checker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to DNS Checker?

Similar projects tracked by PulseGate include DNSSEC, DNS Blocker, and Hash Checker.

Who makes DNS Checker?

DNS Checker is developed by dns-checker.

When did DNS Checker launch?

DNS Checker first shipped in 2025.

Back to the index

DNS Checker

Name: DNS Checker
Author: dns-checker

mozilla.orgBrowser DevTools & extensions

DNS Checker is a Firefox browser extension that displays DNS information for the current website, including IP addresses, name servers, and related configuration details. It is intended for developers and network administrators troubleshooting domains and website connectivity.

FreeWebEmbeddableWindowsmacOSLinux

Visit mozilla.org

Overview

5 features

DNS Checker sits in PulseGate's Browser DevTools & extensions category. It focuses on diagnosing website DNS configuration and network problems from the browser. DNS Checker is a consumer product aimed at web developers and network administrators. DNS Checker is free to use. It runs on the web, embeddable surfaces, Windows, macOS, and Linux.

Behind DNS Checker is dns-checker, and it first shipped in 2025. Among its 5 catalogued features are DNS lookup, IP address display, and name server display. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

DNS lookup
IP address display
Name server display
Current-site detection
Browser tab access

Built with & integrations

Runs on

BrowserEmbeddableWindowsmacOSLinux

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed14 Sep · 13:05 UTC
DNS Checker verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about DNS Checker

What does DNS Checker do?: DNS Checker focuses on diagnosing website DNS configuration and network problems from the browser. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is DNS Checker for?: DNS Checker is a consumer product built for web developers and network administrators.
Is DNS Checker free?: Yes — DNS Checker is free to use.
What platforms does DNS Checker run on?: DNS Checker runs on the web, embeddable surfaces, Windows, macOS, and Linux.
Is DNS Checker still maintained?: Unverified. DNS Checker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to DNS Checker?: Similar projects tracked by PulseGate include DNSSEC, DNS Blocker, and Hash Checker.DNSSEC DNS Blocker Hash Checker
Who makes DNS Checker?: DNS Checker is developed by dns-checker.
When did DNS Checker launch?: DNS Checker first shipped in 2025.

At a glance

Pricing: Free
Platforms: Web
Built for: web developers and network administrators
Model: B2C
Solves: Diagnosing website DNS configuration and network problems from the browser.

Registered as

Firefox Add-ons: dns-web-checker

Index record

Indexed: 14 Sep 2026
Lifecycle: Alive
Last seen: 14 Sep 2026

Identity audit (13)

Slug: dns-checker-mozilla-org
Lifecycle state recorded: 14 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 14 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 14 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/dns-web-checker

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