Tech stack detection with evidence
Identifies frameworks, libraries, CMSs, tag managers, and other technologies on the open page, while keeping the evidence that matched each detection beside the result.
LoupeKit
LoupeKit is a browser panel that inspects live web pages for stack details, layout, SEO, accessibility, and AI-generated code smells. It works as an over-the-page extension with a free tier and Pro options for exports, reports, advisories, and server-side readings.
Browser panel for page inspection and audits
LoupeKit is a browser panel that floats over the current page and reads what is there: the stack, the layout, the page signals, the SEO surface, accessibility details, and more. Its homepage positions it as a way to read any page “like you built it,” with each tab focused on a different kind of inspection.
The product is organized into nine tabs and 70 tools and diagnostics, with the tab views presenting evidence alongside each reading. The source emphasizes local, in-browser reads for most checks, no host permissions, and free access to the page-reading tools, while Pro adds exports, reports, advisories, and some server-side readings.
Core features
Version advisories and vulnerability lookup
Checks detected versions against published advisories and CVEs. The Stack tab notes that vulnerability checks run on a press rather than automatically on open.
Headers and load diagnostics
Reads response headers and page-load pulse data such as nodes, requests, bytes, and paint timings without asking for extra data beyond the current page load.
Vibe audit with rule-level findings
Scores the page for AI-generated code smells, prints the rules behind the score, and shows a refactor suggestion for each finding.
UI inspection and reversible edits
Provides live inspect-and-edit style UI readings, including box model, element type, and colours, with the ability to change the page and take the change back.
Large tool library with command palette
Includes a tools grid with 70 tools and diagnostics, searchable from a command palette that spans tools, tabs, and sections.
Practical use cases
Reverse-engineer a page’s stack
A developer can open the Stack tab to see which frameworks, CMSs, libraries, and tags a live page appears to use, along with the matched evidence and any published advisories for detected versions.
Study layout and visual details in place
A designer or frontend engineer can inspect colors, box model values, focus path, and other UI signals directly on the page, then test changes and revert them within the panel.
Review AI-generated code or markup smells
An editor or reviewer can run the Vibe audit to see which parts of the page read as generated, inspect the printed rules, and use the refactor suggestions to improve the page.
Check a page from search and accessibility angles
A site owner can use the SEO, accessibility, and domain tabs to review what crawlers, assistive software, and domain records are likely to see before publishing changes.
Package findings for external review
A consultant or agency can create a link-based report or evidence pack on Pro when they need to share findings, baselines, or timestamped audit results with a client or procurement team.
Pros and Cons
Pros
- Covers multiple inspection modes in one panel, including stack, UI, SEO, accessibility, domain, and developer views.
- Keeps evidence next to results, which helps explain why a detection or finding appeared.
- Includes a large tool set with 70 tools and diagnostics, searchable from a single command palette.
- Uses no host permissions and says page reads stay local unless a specific reading requires a server request.
- Offers a free tier for the main page-reading tools and diagnostics, with Pro available for heavier workflows.
Cons
- Some readings are Pro-only, including exports, reports, advisories, and server-side readings.
- The source does not show broad integration details such as external export destinations, team workspaces, or account-sharing features.
FAQ
What is LoupeKit?
LoupeKit is a browser panel that reads the page you are on and organizes its outputs into nine tabs, including stack, vibe, UI, developer, SEO, accessibility, domain, server, and tools. The homepage describes it as a panel that floats over the page and reads the page in front of you.
What browsers does it support?
The source shows LoupeKit working as a browser extension panel that opens over the current page. It is described as installable in multiple browsers, including Chrome, Firefox, Edge, Brave, Opera, and other Chromium-based browsers.
Is LoupeKit free?
LoupeKit has a free tier for the page-reading tools and diagnostics, plus Pro plans for exports, reports, advisories, and server-side readings. The pricing page lists Pro Monthly at €6.99 per month and Pro Lifetime at €74.99 once, with the lifetime price scheduled to rise after launch.
Does LoupeKit send page data anywhere?
The site says the extension ships with no host permissions and that nothing is sent when reading a page. The pricing page also says paying does not change that and that there is no version that transmits the page.
How do you access the tools?
The site presents command-palette access with ⌘ K or Ctrl K and says the panel contains 70 tools and diagnostics. The panel pages also show that some paid readings, such as advisories and server-side data, are reserved for Pro.
Quick Facts
- Category
- Developer Tool
- Platform
- Browser extension panel
- Primary use
- Inspecting and auditing live web pages
- Tabs
- 9
- Tools and diagnostics
- 70
- Website
- loupekit.com
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