Sell Ltd
Chrome, Edge, Brave, Arc & Opera

See the company behind any website — in one click

The Sell Ltd extension reads the site you're on, finds its UK company number in the footer or legal pages, and instantly shows filed financials, directors, ownership and filings — with a link straight into the full dossier.

Free · No account needed to try

Finds the company for you

Scans the page, footer, terms, privacy and contact pages for a UK company number — and falls back to a register name search when there isn't one.

Real filed financials

Turnover, profit, total assets, net worth, cash and employees across the last three filed years — straight from filed accounts.

Directors and ownership

Active directors, persons with significant control, outstanding charges, insolvency history and recent filings.

Chris, in your sidebar

Ask Chris — our AI deal adviser — anything about the company you're looking at: financial health, valuation range, buyer angle and red flags, grounded in its filings.

Search and save as you browse

Live typeahead for any UK company or director, plus one-click saving into watchlists that sync straight to your Sell Ltd account.

Read-only and private

The extension never changes the sites you visit and only sends the company details it detects. Results are cached locally for 24 hours.

Sell Ltd Chrome extension showing Victorian Plumbing company financials, directors and recent filings in the browser side panel

The side panel in action on a real UK ecommerce site — Victorian Plumbing Ltd (04079213).

Install it in two minutes

  1. 1Download the ZIP below and unzip it somewhere you'll keep it.
  2. 2Open chrome://extensions in Chrome (or Edge, Brave, Arc, Opera).
  3. 3Turn on Developer mode using the toggle in the top-right.
  4. 4Click "Load unpacked" and select the unzipped folder.
  5. 5Pin the Sell Ltd icon to your toolbar, then click it on any website.

Publishing it to the Chrome Web Store

Loading it unpacked is for you and your team. When you're ready for the public, this is the full process.

Extension ZIP packaged and ready
128×128 icon included in the package
At least one 1280×800 store screenshot
Privacy policy live at sellltd.co.uk/privacy
Chrome Web Store developer account created
Listing description, permissions and data use declared
Step 1

Create a developer account

Go to the Chrome Web Store Developer Dashboard and sign in with the Google account you want to own the listing. There is a one-off $5 registration fee.

Step 2

Prepare your listing assets

You'll need: a 128×128 icon (included in the ZIP), at least one 1280×800 screenshot of the panel in action, a short description (132 characters) and a detailed description.

Step 3

Add a privacy policy

Chrome requires a public privacy policy URL because the extension reads page content. Point it at sellltd.co.uk/privacy and state that page text is used only to detect a company number and is not stored.

Step 4

Declare permissions and data use

Justify each permission: activeTab and host access to read the page you're on, storage for the 24-hour cache. Tick that you do not sell user data.

Step 5

Upload and submit

Create a new item, upload the ZIP, fill in the listing, choose Public or Unlisted visibility, then submit for review. First reviews usually take a few days.

Step 6

Shipping updates

Bump the "version" in manifest.json (e.g. 1.0.1), re-zip, and upload it as a new package on the same item. Updates roll out to installed users automatically.