Privacy Policy for What CMS Is This Site

1. Who we are and what this policy covers

What CMS Is This Site is a browser extension for Google Chrome, published by an independent developer. This policy explains what the extension does with your data, what our website at whatcmscheck.com does, and what rights you have. It applies to the extension itself and to the pages of whatcmscheck.com that belong to it: the front page, the welcome page, the uninstall page and this policy.

The short version: the extension reads the page you are looking at only when you click its icon, works inside your browser, keeps nothing and sends nothing to us.

2. What data the extension handles

The extension does not send personal data to us or to anyone else, and we do not sell it. The data described below is handled only on your device.

• Technical signals from the current page, only after your click. When you click the extension icon, it runs a read-only script once in the tab you are looking at. The script collects technical signs of how the site is built: meta tags such as the generator tag, the addresses of the page's scripts, styles, images and frames with their query strings removed, class names and ids, the names of cookies the page can see (never their values, which are dropped inside the page), and a fixed list of objects that site builders define, such as the name of a Shopify theme. HTML comments and inline scripts are compared with the extension's list of patterns inside the page; only the names of the patterns that matched leave the page. The script does not read the text you see, form fields or what you type, and it changes nothing on the page.
• The address of the current tab. The extension window shows the domain of the tab you clicked on.
• One request to the same website. To read the website's response headers (for example Server or X-Powered-By), the script sends one HEAD request for the address you already have open, to that same website, without cookies. It goes to the website you are viewing, not to us, and that website may log it like any other visit. If it does not answer within 1.5 seconds, the extension works without it.
• Nothing is stored. The result lives only in the extension window and disappears when you close it. The extension has no storage permission, keeps no history and has no settings.
• Copy. When you press Copy, the result is placed on your clipboard as text. Nothing is copied unless you press the button.
• No accounts. The extension has no sign-up, no login and no user profiles.
• No tracking inside the extension. The extension contains no analytics, no advertising code and no remote code. Its list of technologies is part of the extension and is not downloaded from anywhere.

3. Cookies and analytics on our website

The pages of whatcmscheck.com use Google Analytics 4 to count visits and to understand which pages are useful. This happens only on the website, not inside the extension. The uninstall page has no analytics. The welcome page also reports whether the extension's icon is pinned to your toolbar. We never send Google Analytics the addresses of the websites you check with the extension. Advertising features are off for everyone.

If you are in the European Economic Area, the United Kingdom or Switzerland, analytics cookies are off by default. Google works out your country from your IP address. Without your consent, Google Analytics sets no cookies and stores no identifier on your device. The Google script still loads and can send Google a basic signal without a cookie: the page you opened, the time, your browser and device type, and your approximate location.

Everywhere else, analytics cookies are on by default. Google Analytics sets cookies named _ga and _ga_*, which can last up to two years, and processes the same technical data.

Your browser connects to Google to load the script, so Google sees your IP address. Google says Google Analytics 4 uses it to estimate location and does not store it. Statistics are kept for 14 months (see section 8).

Your choice. If your browser's time zone is in Europe, the front page of whatcmscheck.com asks "Allow analytics cookies?" Yes and No take one click each. We save your answer in your browser's local storage and apply it to the whole website, including the welcome page and this policy. The "Cookie settings" button at the bottom of the front page lets anyone, in any country, change the answer at any time. Choosing No stops analytics cookies and deletes the ones already set.

You can also block cookies in your browser settings, use a content-blocking extension or install Google's opt-out add-on (tools.google.com/dlpage/gaoptout). The website keeps working without them. Google's own privacy policy describes how Google processes this data.

Server logs. Like any web server, ours keeps a technical log of requests to these pages: IP address, the address requested, the time, the browser type and, if your browser reports it, the page you came from. We use it to keep the site running and safe, and it is deleted automatically after a short time. The extension sends nothing to this log; only opening one of these pages does.

4. How we use data

The only data we receive is the aggregated website statistics and server logs described above and, if you choose to send them, your answer on the uninstall page and any email you write to us. We use the statistics to see how many people reach the welcome page and which pages are visited, the logs to keep the site running and safe, and your answers and emails to reply to you and to improve the extension. We do not build individual profiles and we do not combine this data with any other source.

When you remove the extension, Chrome opens a short page on our website that asks why. Answering is optional. Only if you press Send, the reason you picked and the text you typed (up to 500 characters) go to our server, which passes them to us as a message in Telegram with the name of the extension and does not store them. To stop spam, the server counts answers per day by a one-way hash of your IP address with a key that changes every day; the hash is kept for 2 days and is never part of the message. The uninstall page has no analytics and sets no cookies. Please do not put personal details in your answer.

The use of information received from Google APIs will adhere to the Chrome Web Store User Data Policy, including the Limited Use requirements.

5. Who we share data with

We do not sell or rent data, and we share it only with the services named here. They process data for us: Google Analytics, as a service provider for the website statistics in section 3; Telegram, which delivers answers from the uninstall page to us (it receives the extension name, the reason and the text you send, but not your IP address or any install ID); and our hosting and email providers, which store the server logs and the emails you send us. Please do not put personal details in your answer on the uninstall page. We have no server that receives data from the extension.

6. Your rights, including under the GDPR

If you are in the European Economic Area, the United Kingdom or Switzerland, you have the right to access, correct or delete personal data about you, to restrict or object to its processing, and to lodge a complaint with your local data protection authority. The extension keeps no data, so there is nothing about you to access or delete on your device. For website analytics, you can opt out as described in section 3. For anything else, write to [email protected] and we will answer within 30 days.

The legal basis for analytics cookies in those places is your consent, which you can withdraw as described in section 3. The legal basis for the basic signal without cookies, for website analytics elsewhere and for server logs is our legitimate interest in understanding how the website is used and keeping it safe. The legal basis for emails and uninstall page answers you send us, and for counting those answers by the IP hash, is our legitimate interest in replying to you, improving the extension and preventing spam.

7. Children

The extension and the website are not directed at children under 13 (or under the age set by your country's law). We do not knowingly collect data from children. The extension sends nothing to us, so we hold no such data from it.

8. Data retention and deletion

The extension keeps no data: the result disappears when you close its window, and removing the extension from Chrome removes the extension itself. Website analytics data is kept by Google Analytics for the retention period set in our account (14 months) and then deleted automatically. Server logs are deleted automatically after a short time. We keep emails only as long as we need them to reply or to improve the extension, and you can ask us to delete them. Answers from the uninstall page stay in our private Telegram chat until we delete them; our server keeps only the daily counts and the IP hash described in section 4, for 2 days.

9. Changes to this policy

If we change this policy, we will update the text on this page and the date at the top. Please check this page from time to time if you want to stay informed.

10. Contact

Questions about this policy or about your data: [email protected].