StackPeek Chrome Extension | Website Tech & SEO Inspector
Inspect public website technology, CMS, SEO, indexability, content and performance clues directly from Chrome.
StackPeek is a lightweight Chrome extension by PlugTheHole.com that helps you understand what a website is likely built with. Open a page, click StackPeek, and review public clues such as CMS signals, platform fingerprints, theme and plugin hints, SEO basics, sitemap checks, content structure, links, images and optional PageSpeed data.
It is built for website owners, developers, agencies, hosting providers, SEO teams and curious technical users who want a quick, readable overview without digging through source code manually.
What StackPeek helps you check
StackPeek checks the current page first. This is important because many sites use different systems in different areas. A homepage may use one CMS, while a shop, client area, booking flow or app section may use something else.
StackPeek can help you spot:
- CMS and platform clues
- Website builder clues
- eCommerce platform clues
- Headless CMS and enterprise CMS signals
- Theme and public plugin clues
- SEO title and meta description checks
- Canonical and robots signals
- Sitemap and robots.txt checks
- Heading structure
- Image alt text basics
- Internal and external link counts
- Structured data clues
- Social sharing tags
- Optional PageSpeed Insights results
Current page first, main site second
A mixed website can be confusing. StackPeek shows the technology clues for the actual page you are viewing first, then shows the main site URL as secondary context.
For example:
Current page: client portal or app
Main URL: WordPress, Drupal, Sitecore or another CMS
This helps avoid misleading results when different parts of a website use different technology.
Key Features
- Shows the current number of open Chrome tabs.
- Updates automatically when tabs or windows change.
- Red warning badge when your tab count goes above your chosen limit.
- Adjustable tab warning threshold.
- Subtle normal badge colour that blends in with Chrome.
- Simple popup with current tab count and settings access.
- Lightweight Manifest V3 Chrome extension.
- No tracking, no account, no analytics, no remote scripts.
- Created by PlugTheHole.com.
Built for useful public clues
StackPeek does not hack, scrape private data or access hidden server settings. It reads public information that a normal browser can see, then presents it in a clearer way.
That includes things like:
- HTML and meta tags
- public script and stylesheet paths
- visible CMS and platform markers
- public robots.txt and sitemap clues
- public page content structure
- optional user-triggered PageSpeed checks
CMS and platform detection
StackPeek recognises public clues for many popular systems, including CMS platforms, website builders, eCommerce systems, headless CMS tools, enterprise DXP systems and client portals.
Examples include WordPress, Drupal, Joomla, Shopify, Wix, Squarespace, Webflow, TYPO3, HubSpot CMS, Magento / Adobe Commerce, Contentful, Sitecore, Adobe Experience Manager, Storyblok, Sanity, BigCommerce, PrestaShop, Shopware, WHMCS and more.
Detection is evidence-based. If a platform hides its public clues, StackPeek may show a cautious result such as possible clue or unknown rather than pretending certainty.
SEO overview
StackPeek gives a quick on-page SEO overview, including:
- title and meta description presence
- title and description length warnings
- canonical URL
- robots meta tag
- indexability clues
- heading structure
- image alt basics
- link counts
- schema clues
- Open Graph and Twitter/X sharing tags
This is not a full SEO audit, but it gives a fast first look at the signals that often matter when reviewing a page.
Optional PageSpeed checks
The Speed tab lets users run PageSpeed checks when needed. StackPeek does not run these checks automatically every time, which helps keep the popup fast and reduces unnecessary remote requests.
Privacy-friendly by design
StackPeek keeps its purpose narrow. It scans public page clues from the current tab after the user opens the extension. It does not load remote advertising scripts, does not include hidden tracking code, and does not access private server data.
Who made StackPeek?
StackPeek is built by PlugTheHole.com.
PlugTheHole.com creates practical tools for website owners, developers, hosting providers, agencies and online businesses.
Visit PlugTheHole.com to learn more.
Disclaimer
StackPeek is an independent tool. It is not affiliated with, endorsed by or officially connected to any CMS, browser, search engine, eCommerce platform or technology vendor mentioned in its results. Platform names are used only to describe possible public technology clues.
What is StackPeek?
StackPeek is a Chrome extension that helps inspect public website technology, CMS, SEO, indexability, content and performance clues from the page you are viewing.
Does StackPeek detect every CMS perfectly?
No. StackPeek uses public evidence visible to the browser. Some platforms hide their CMS or use custom front ends, especially enterprise and headless systems. When evidence is limited, StackPeek should show a cautious result.
Does StackPeek check the current page or only the homepage?
StackPeek checks the current page first. It also shows the main URL as secondary context, because different areas of a website can use different technology.
Can StackPeek show all installed plugins?
No. StackPeek can only show public plugin and service clues. Hidden, server-side-only, inactive or renamed plugins may not appear.
Is StackPeek an SEO audit tool?
StackPeek is a quick inspection tool. It checks useful SEO basics, but it is not a replacement for a full SEO audit.
Does StackPeek collect private data?
StackPeek is designed to inspect public page clues. It does not access private server settings or hidden admin data.