---
title: "Domain Age Checker by Semantic Pen – Chrome extension stats, history and permissions"
description: "2,000 users, rated 4.78 by 27 people. Version 2.3, updated 2025-04-24. Requests 2 permissions."
url: "https://extensiontracker.com/extension/gmfpkimhlpfknllbhfbcjbghmkhhgdbc"
---

# Domain Age Checker by Semantic Pen

Live in the Chrome Web Store.

- Users: 2,000
- Rating: 4.78 from 27 ratings
- Last checked: 2026-09-27 01:57 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #14,553 of 264,703 live extensions
- Rank in Developer Tools: #1,275 of 27,615

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> Check domain age and registration details for any website

- Extension ID: `gmfpkimhlpfknllbhfbcjbghmkhhgdbc`
- Developer: [David Malla](https://extensiontracker.com/developer/uea402a97cd1a9563bb34925b050cfcdf)
- Category: [Productivity › Developer Tools](https://extensiontracker.com/category/productivity/developer)
- First published: 2024-10-04
- Last updated: 2025-04-24
- Version: `2.3`
- Size: 21.3 KiB
- Minimum Chrome: 88
- Languages (1): English
- Website: `semanticpen.com`
- Support page: `https://www.semanticpen.com/contact`
- Chrome Web Store: <https://chromewebstore.google.com/detail/domain-age-checker-by-sem/gmfpkimhlpfknllbhfbcjbghmkhhgdbc>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fgmfpkimhlpfknllbhfbcjbghmkhhgdbc>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 2,000 | 4.78 | 27 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

**Every website:** it can read and change your data on all the sites you visit.

### Sites where it runs scripts

- `<all_urls>`: Every website

### Browser features

- `activeTab`: The tab you're on, only after you click the extension
- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [Domain Authority Checker](https://extensiontracker.com/extension/aiehdjgeijiaojekcihghpcamepglmha) | 10,000 | 4.44 | 287 | Tools |
| [Domain Authority Checker - Google SERP](https://extensiontracker.com/extension/opolopmmjpcggcbeeielhpcpcinoclgd) | 1,000 | 3.84 | 80 | Tools |
| [Domain Age Checker Google SERP - Semantic Pen](https://extensiontracker.com/extension/ckgeaghalgglnfmdfjbajmlckkkicdfm) | 874 | 4.33 | 94 | Workflow & Planning |
| [Domain Authority, Traffic, Keywords & Technical Analysis- Semantic Pen](https://extensiontracker.com/extension/aopnnahnggcgfbjehhaicipcnjoaboil) | 343 | 5.00 | 7 | Tools |
| [Open Multiple URLs](https://extensiontracker.com/extension/dfanaedlfeapcalipllnkkcdboffjnap) | 114 | 5.00 | 3 | Workflow & Planning |
| [Keyword Auto Complete Magic](https://extensiontracker.com/extension/ocjppcomicmadlagldlinpcjipodcpii) | 99 | 5.00 | 1 | Tools |
| [Comment Whisper - AI Comment Generator for Twitter (X) & LinkedIn](https://extensiontracker.com/extension/pohihbciacjkimfjojfjfhiinjlikace) | 81 | 4.60 | 5 | Tools |
| [Tweet Whisper - AI Tweet Generator Twitter / X](https://extensiontracker.com/extension/mihngeabpmajbmkioejegppfjeponcfc) | 12 | – | – | Workflow & Planning |
| [YouTube Transcript: AI Summary & Chat](https://extensiontracker.com/extension/bbappnicmjmiliipjcmciaffiglmoekd) | 5 | 5.00 | 1 | Workflow & Planning |

All 10 extensions by [David Malla](https://extensiontracker.com/developer/uea402a97cd1a9563bb34925b050cfcdf).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 2026-09-27 01:57 UTC; next check around 2026-09-29.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “Domain Age Checker by Semantic Pen” (gmfpkimhlpfknllbhfbcjbghmkhhgdbc). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/gmfpkimhlpfknllbhfbcjbghmkhhgdbc. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_gmfpkimhlpfknllbhfbcjbghmkhhgdbc,
  title   = {Domain Age Checker by Semantic Pen (gmfpkimhlpfknllbhfbcjbghmkhhgdbc)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/gmfpkimhlpfknllbhfbcjbghmkhhgdbc},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/gmfpkimhlpfknllbhfbcjbghmkhhgdbc>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.