Privacy Policy

Teardown is a Chrome extension that reads the page you are currently looking at and shows you its structure. It has no account system, no analytics, and no backend. This policy explains exactly what that means.

The short version

Everything the extension produces stays in your browser. Nothing is transmitted to the developer or to any third party, with one exception you control, described under Webhooks below.

This website also offers free web tools that check a page you paste in. Those do use a server, because they have to fetch the page for you. It is the only part of this project that does, it is covered in full under The free web tools below, and it is entirely separate from the extension.

What the extension reads

When you click Scan Page, a script runs in your active tab and reads, from the rendered page only:

• Heading elements (H1 to H6) and their text and position
• The page title, meta description and Open Graph image URL
• Computed text and background colours, and font family, size and weight
• Visible text content, used to calculate keyword frequency
• Links, their destinations and their anchor text
• Resource timing data, used to estimate total page weight
• The page URL and markers that identify the platform it is built on

If you use the Asset Scraper, it additionally reads image URLs from the page. If you use the Sitemap or robots.txt / llms.txt tools, the extension requests those files from the site you are on.

What is stored, and where

Scan results, your projects and your settings are written to Chrome's storage API on your own machine. Scan history is capped at the 50 most recent scans per project; older ones are discarded automatically. You can delete any project or clear a project's history at any time from within the extension, and uninstalling it removes everything.

None of this is synced to a server operated by the developer, because there is not one.

Webhooks, the one exception

Settings includes an optional Webhook URL field. It is empty by default. If you enter a URL, scan results are sent to that endpoint, one you choose and control, as a POST request. Nothing is sent anywhere if the field is blank. Clear the field to stop it.

Third parties

The Insights tab includes links that open Ahrefs, Semrush, Ubersuggest and PageSpeed Insights for the current URL. These are ordinary links: nothing is sent until you click one, and once you do, that service's own privacy policy applies. Teardown is not affiliated with any of them.

Permissions, and why they exist

• activeTab and scripting, used to run the scan on the tab you are viewing, only after you click
• storage, used to keep your projects, scans and settings locally
• downloads, used to save reports, CSVs and scraped images to your machine
• host permissions, so the extension can work on any site you choose to scan, and fetch that site's sitemap and robots.txt

What is not collected

No browsing history, no personal information, no telemetry, no crash reporting, no advertising identifiers. Nothing is sold or shared, because nothing is collected.

Children

The extension is a professional tool and is not directed at children under 13. No personal data is collected from anyone.

Changes

If this policy changes, the date at the top of this page changes with it, and the updated version is published here before the change takes effect.

Cookies and this website

This website sets no cookies, uses no analytics and has no tracking pixels, so there is nothing to consent to and no banner to dismiss.

It also loads nothing from anyone else's servers. Every font, stylesheet and image is served from this domain, so no third party, no font CDN, no script CDN, nobody, sees your IP address or user agent because you visited this page. Earlier versions of this site pulled fonts from Google and jsDelivr and the stylesheet from the Tailwind CDN; those are gone.

The only party that sees the request is our host, Vercel, who serve the page and keep short-lived operational logs in the ordinary course of running a web server. This section is about the website; what the extension does on the network is covered above under Webhooks and What the extension reads.

The free web tools

The heading structure checker, the meta length checker and the alt text checker are pages on this site, not part of the extension. They work differently and it is important to be straight about how.

When you submit a URL, it is sent to a function running on this site's host, which fetches that page from the public internet and reads its headings, meta tags and image alt attributes. The result is returned to your browser and displayed. This is the one place in the whole project where something you type reaches a server.

• The URL is not stored. It is used to make the request and then discarded. There is no database and no record of what has been checked.
• The fetched page is not stored either. It is read in memory to produce the result and then dropped.
• No account, no cookie, no identifier. Nothing links one check to another or to you.
• Only public pages. The tool fetches as an anonymous visitor, so it cannot reach anything behind a login, and it refuses addresses that are not publicly reachable.
• Rate limiting uses the IP address your request arrives with, held in memory for a matter of minutes to count recent requests. It is not written to disk and not used for anything else.

Our host, Vercel, keeps short-lived operational logs in the ordinary course of running a web server, and those logs can include the URL of a request. That applies to this endpoint as it does to any page on the site.

Your rights

UK GDPR gives you rights over personal data held about you: access, rectification, erasure, restriction, portability and objection. In practice we hold no personal data about you, so there is nothing to disclose, correct or delete on our side. Everything the extension records is already on your own machine, under your control, and removed when you uninstall it.

If you believe we have handled data improperly you can complain to the UK Information Commissioner's Office at ico.org.uk.

Contact

Privacy and data questions: privacy@lukeduff.co.uk
Anything else: hello@lukeduff.co.uk

Data controller: Luke Duff, a sole trader in the United Kingdom.