Local appraisal on page
The extension evaluates listings directly in the browser on Amazon pages, so no account or cloud lookup is required during shopping.
Knockoff
Knockoff is a free browser extension for Chrome and Firefox that filters pseudo-brand and unbranded listings from Amazon search results. It appraises listings locally and lets you hide, dim, or label items with adjustable strictness.
Overview
Knockoff is a browser extension for Amazon that filters pseudo-brand and unbranded listings out of search results. It is described as free and fair-source, and the source page says it works in Chrome and Firefox.
The extension appraises listings locally in your browser rather than sending shopping behavior to a cloud service. It compares unknown names against a curated list of more than 5,000 real brands, then lets you decide how aggressively to filter the results.
Features
Brand-based filtering
A curated register of more than 5,000 real brands is refreshed daily. Recognized brands pass immediately, while unknown names are scored against pseudo-brand patterns.
Three strictness levels and display modes
You can choose Relaxed, Standard, or Strict. Filtered listings can be hidden, dimmed, or labeled, depending on how you want to review results.
Sponsored listing filter
A toggle can remove Amazon's paid Sponsored listings from search results. The feature is off by default.
Custom trust and block lists
You can trust or block brands yourself, and those personal lists override the other signals used by the extension.
Community reporting loop
Misclassification reports are one-click and anonymous. The site says reports update the shared brand list within a day without requiring a manual extension update.
Use cases
Cleaner Amazon product searches
Useful for shoppers who want to reduce noisy Amazon results and focus on established brands instead of pseudo-brand listings.
Adjusting search strictness
Helpful when you want a stricter or looser filter depending on the category you are browsing, using Relaxed, Standard, or Strict modes.
Side-by-side review of flagged items
Appropriate for people who prefer to review borderline results visually, with dimmed or labeled items instead of fully hidden listings.
Hiding sponsored listings
Useful for shoppers who want to remove Amazon's paid Sponsored results from search pages without changing the rest of the filtering behavior.
Correcting misclassifications
Good for users who notice recurring false positives or misses and want to correct them locally, or report them back to the shared list.
Pros and Cons
Pros
- Runs locally in the browser, which keeps the appraisal on the page instead of requiring cloud lookups.
- Lets you hide, dim, or label items rather than forcing one fixed filtering style.
- Supports custom trust and block lists that override the default scoring.
- Includes one-click misclassification reporting that feeds a shared brand list.
Cons
- The pricing page currently shows a 404, so the source does not confirm whether there are any paid plans or premium tiers.
- The site only names Chrome and Firefox, so broader platform support is not documented.
- Some capabilities, such as sponsored-listing filtering, are optional and off by default.
FAQ
How does Knockoff work on Amazon?
It is a browser extension for Chrome and Firefox that runs on Amazon search pages. After installing it, you can choose a strictness level and optionally override individual verdicts on a listing-by-listing basis.
Is Knockoff free?
The page content describes it as a free, fair-source browser extension. The pricing page currently returns a 404, so the source does not show any paid plans or tiers.
What does it change in search results?
Knockoff can hide filtered listings, dim them until hovered, or label them with a warning chip. It can also strip sponsored listings if you turn that option on.
Which browsers does it support?
The source explicitly mentions Chrome and Firefox. It does not provide other platform, mobile, or browser compatibility details.
Is it designed for team or shared use?
The product describes personal trust/block lists that override other signals, and a one-click report flow for misclassifications. It does not describe shared team workspaces or admin features.
Quick Facts
- Category
- Browser extension
- Primary use
- Filtering Amazon search results
- Platforms
- Chrome, Firefox
- Pricing
- Listed as free; pricing page currently returns 404
- Notable workflow
- Local on-page appraisal with optional sponsored-listing filtering
- Source domain
- knockoff.co
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