Offerboxer

Free Chrome extension

Five bol tools. One extension window.

Compare the Buy Box, calculate your margin, explore search volumes and keep a product shortlist. Five tools for bol.com sellers, in one Chrome extension.

Add to Chrome for free How it works

Works in Google Chrome on a computer. Free to install. The manual calculation needs no account.

Margin Check Example
Adjustable laptop standEAN 8712345678906 · bol.com

Buy Box NL€29.956 sellers

Selling price
€29.95
Bol commission official
−€4.80
Purchase cost
−€11.50
Shipping
−€3.95
VAT (21%)
−€5.20
Profit per unit €4.50 18% margin

Available in Chrome · bol Toolkit

Five bol tools. One extension window.

Compare the Buy Box, calculate your margin, explore search volumes and keep a product shortlist. Five tools for bol.com sellers, in one Chrome extension.

Available now through the Chrome Web Store. Already using Offerboxer Margin Check? Keep the same extension: bol Toolkit is its updated interface.

  1. Buy Box Coach

    Compare prices, delivery and available seller information with the current Buy Box. Suggestions are estimates, not a promise to win.

  2. Margin Calculator

    Enter your purchase cost. Check profit, maximum purchase cost at break-even or your target margin, and an indicative break-even selling price. Connected commission quotes apply to each exact price.

  3. Search Volume

    Explore 12 months of bol search volumes for NL or BE and related terms through your own connected account. Search counts are not sales estimates.

  4. EAN Grabber

    Select products from the search or category cards already loaded in your browser. Save or copy available EANs. A product without an EAN stays unresolved until you open its page.

  5. My Products

    Keep a local shortlist with saved costs per EAN and market. Refresh recent saved products to compare current observations with their saved values.

bol Toolkit interface · example screen
bol Toolkit interface · example screen

Free installation and manual calculation need no account. Official commission, Coach market data and Search Volume require an Offerboxer account, a working bol integration and the appropriate plan access. VAT starts at an editable 21%; logistics at €0 unless you saved other values. Review these assumptions.

Already installed? Keep the same extension.

Chrome normally installs Store updates automatically. If Chrome disables the extension after the bol-page permission change, review the new access request before enabling it. Reload open bol pages after updating. Open Connection to pair your own Offerboxer account; logging into bol alone does not connect it.

Private monitoring and cloud cost sharing are not currently available. Your shortlist and purchase costs stay on your device. Connecting your Offerboxer account enables the read-only market tools; it does not start monitoring.

Free or connected

Free to use, stronger with your account.

Without an account

Free

  • Product name, EAN and selling price from the page
  • Margin calculation with your own commission, VAT and costs
  • Save purchase costs per EAN and market
Add to Chrome

How it works

Up and running in three steps.

  1. 1

    Add it to Chrome

    Install Margin Check for free from the Chrome Web Store and pin the icon to your toolbar.

  2. 2

    Open a bol product

    Click the icon on a bol.com product page. The extension reads the name, EAN and price.

  3. 3

    Enter your purchase cost

    You see your margin straight away. Choose "Connect through Offerboxer" once for automatic commission and competitors.

Privacy

Built to see as little as possible.

Purchase costs and your shortlist stay on your device. Private monitoring and cloud cost sharing are currently unavailable. Bol API keys stay on the server. The optional bol-page strip reads the loaded product page without background crawling or automatic page-view reporting.

Privacy notice of the extension

Frequently asked questions

Is Margin Check really free?

Yes. Installing it and the manual margin calculation are free, without an account. For the automatic bol commission, competitors and Buy Box you connect an Offerboxer account.

Do I need an Offerboxer account?

Not for the manual calculation. You do for data that comes straight from bol: the official commission at your selling price and the competing offers. Offerboxer fetches those with your own bol connection.

Does it work on my phone?

No. Chrome extensions only work in Google Chrome on a computer (Windows, Mac, Linux or ChromeOS).

What happens to my purchase costs?

Purchase costs and your shortlist stay on your device. Private monitoring and cloud cost sharing are currently unavailable. Bol API keys stay on the server. The optional bol-page strip reads the loaded product page without background crawling or automatic page-view reporting.

Is this a bol.com extension?

No. Margin Check is made by Offerboxer, an independent platform. It is not affiliated with or endorsed by bol.com.

Is bol Toolkit a different extension?

No. It is the updated interface of Offerboxer Margin Check, available through the same Chrome Web Store item. Keep your existing installation.

Check your margin before you buy stock.

Free in the Chrome Web Store. Want your prices to move automatically within your limits as well? Try Offerboxer.

Add to Chrome for free Start free trial