Who is Domain Age Checker for?

Domain Age Checker is a consumer product built for website owners, developers, and SEO professionals.

Does Domain Age Checker have a free plan?

Yes — Domain Age Checker is free to use.

What platforms does Domain Age Checker run on?

Domain Age Checker runs on the web, embeddable surfaces, Windows, macOS, and Linux.

Is Domain Age Checker still active?

Unverified. Domain Age 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 Domain Age Checker?

Similar projects tracked by PulseGate include Domain Age Checker Tool, WHOIS Check, and DNS Checker.

Who develops Domain Age Checker?

Domain Age Checker is developed by chk7964.

When did Domain Age Checker launch?

Domain Age Checker first shipped in 2024.

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Domain Age Checker

Name: Domain Age Checker
Author: chk7964

mozilla.orgBrowser DevTools & extensions

Domain Age Checker is a Firefox browser extension that checks domain age and related WHOIS information. It is intended for users researching websites, domains, and SEO-related metrics directly from the browser.

FreeWebEmbeddableWindowsmacOSLinux

Visit mozilla.org

Overview

4 features

In the Browser DevTools & extensions space, Domain Age Checker takes a focused approach. It focuses on checking a domain's age and registration details without using a separate WHOIS website. It is built as a consumer product for website owners, developers, and SEO professionals. Domain Age Checker costs nothing to use. It runs on the web, embeddable surfaces, Windows, macOS, and Linux.

It is developed by chk7964, and it first shipped in 2024. Among its 4 catalogued features are domain age lookup, WHOIS lookup, and browser tab access. The interface is available in 32 languages, including Czech, German, and Greek.

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

Domain age lookup
WHOIS lookup
Browser tab access
Firefox integration

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

Indexed17 Sep · 17:32 UTC
Domain Age Checker | Site Age Checker verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Domain Age Checker

What does Domain Age Checker do?: Domain Age Checker focuses on checking a domain's age and registration details without using a separate WHOIS website. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Domain Age Checker for?: Domain Age Checker is a consumer product built for website owners, developers, and SEO professionals.
Does Domain Age Checker have a free plan?: Yes — Domain Age Checker is free to use.
What platforms does Domain Age Checker run on?: Domain Age Checker runs on the web, embeddable surfaces, Windows, macOS, and Linux.
Is Domain Age Checker still active?: Unverified. Domain Age 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 Domain Age Checker?: Similar projects tracked by PulseGate include Domain Age Checker Tool, WHOIS Check, and DNS Checker.Domain Age Checker Tool WHOIS Check DNS Checker
Who develops Domain Age Checker?: Domain Age Checker is developed by chk7964.
When did Domain Age Checker launch?: Domain Age Checker first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: website owners, developers, and SEO professionals
Model: B2C
Solves: Checking a domain's age and registration details without using a separate WHOIS website.

Registered as

Firefox Add-ons: domain-age-checker

Developer

chk7964

Index record

Indexed: 17 Sep 2026
Lifecycle: Alive
Last seen: 17 Sep 2026

Identity audit (13)

Slug: domain-age-checker-site-age-checker-mozilla-org
Lifecycle state recorded: 17 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 17 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: 17 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/domain-age-checker

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