Free browser extension · Beta

Right-click any image. Get a resale value in seconds.

The Item Value Checker browser extension turns every product image on the web into a one-right-click value lookup. Works on Facebook Marketplace, Craigslist, OfferUp, Mercari, and any site with images. Built for thrift flippers, resellers, and anyone who's ever wondered “is this actually a deal?”

Install it (beta)

We're submitting to the Chrome Web Store. While that approval is pending, you can install the extension via Chrome's “Load unpacked” developer mode.

View install instructions on GitHub

Chrome Web Store listing coming soon

How it works

1

Right-click any image

On Facebook Marketplace, Craigslist, OfferUp, Mercari, eBay, Amazon, or any site with product photos.

2

Pick "Check value with Item Value Checker"

The extension grabs the image and sends it to our value-checking backend.

3

See the resale value

A new tab opens with an estimated price range based on real eBay sold listings + a one-click eBay search link.

Built for

Thrift flippers

FB Marketplace sourcing

Garage sale hunters

eBay/Mercari sellers

Estate cleanouts

Card / collectibles flippers

Designer resellers

Sneaker resellers

Why a browser extension?

You can already check item values at itemvaluechecker.com — open the site, upload an image, get an estimate. The extension exists because for people checking 10+ items per session — thrift flippers triaging a cart, resellers scrolling FB Marketplace, dealers at estate sales — that workflow has too much friction.

Right-click → done is one second. Switching tabs, downloading the image, re-uploading it, and waiting is 30+ seconds. Multiplied by hundreds of evaluations per week, that compounds.

The website stays the easier entry point for casual users. The extension is for the people who use the tool every day.

What's coming next

Browser extension FAQs

It lets you check the resale value of any product image on the web without leaving the page. Right-click any image — on Facebook Marketplace, Craigslist, OfferUp, Mercari, anywhere — and pick "Check value with Item Value Checker." A new tab opens with an estimated price range from real eBay sold listings.
Yes, completely free. No signup, no rate limits, no premium tier (yet). The same web tool you can use at itemvaluechecker.com, just one right-click away in any browser tab.
Yes. Right-click any FB Marketplace listing image and choose "Check value with Item Value Checker." A new tab opens with the estimated value. Useful for thrift flippers and resellers triaging deals quickly.
Same backend, same accuracy. The extension just removes the friction: instead of right-clicking, saving image, switching tabs, uploading, and waiting for results, you right-click and you are done. For people checking 10+ items per session (resellers, flippers, dealers), the time savings add up fast.
Not yet — Chrome extensions only work on desktop browsers (Chrome, Edge, Brave, Opera). For mobile, use the responsive web app at itemvaluechecker.com which works in any phone browser.
During the beta period, install via "Load unpacked" mode in Chrome — instructions in the extension repo. Once submitted to the Chrome Web Store, it will be a one-click install.
It needs permission to read images on the pages you visit (so the right-click menu can capture them) and to call our backend API at pricelens-production.up.railway.app. It does not collect browsing history, send analytics, or read non-image content from your tabs.