Chrome Extension for eBay Sellers

Know Your Exact Profit on Every eBay Sale.

eBay Profit Guardian calculates your true margin by auto-scraping fees, shipping, and processing costs from any UK or US listing — right in your browser.

Install on Chrome£14.99 lifetime — no subs
Pay onceNo subscriptionLifetime updates
ebay.com/itm/265843...

Sony WH-1000XM5 Wireless Noise Cancelling Headphones

£219.99

+ £3.99 shipping

Profit Guardian
eBay Fees (13.25%)-£29.15
Payment Processing-£6.72
Packaging & Postage-£4.50
Estimated Profit£78.63
Features

Built for Serious eBay Sellers.

Everything you need to know your true profit margin before you buy or list.

Instant Auto-Scrape

Pulls price and shipping directly from the eBay page DOM. One click and your profit is calculated — no manual data entry required.

Accurate Fee Math

Factors in eBay Final Value Fees, payment processing charges, and packaging costs. Every deduction accounted for with precision.

Floating Widget

See a profit summary right on the eBay page without opening the popup. Your margin at a glance, always visible as you browse.

Unlimited History (Pro)

Track all your calculated flips with full history. Free tier caps at 5 records — Pro unlocks unlimited storage of every calculation.

Custom Fee Rates (Pro)

Adjust percentages to match your specific eBay store tier. If you have a Top Rated or Anchor store, your real fees differ — now your calculator does too.

No Data Collected

All calculations happen locally in your browser. Your eBay data never touches our servers. We don't track, store, or share anything.

How It Works

Install. Browse. Know Your Profit.

01

Browse eBay

Visit any UK or US eBay listing page as you normally would. The extension detects product pages automatically — no setup required.

Works on any listing
02

See Your Profit

A floating widget shows your estimated profit margin in real time. All fees, shipping, and processing costs are calculated instantly from the page data.

Instant calculation
03

Flip with Confidence

Know exactly what you'll walk away with before you buy. Track your flips, adjust fee rates for your store tier, and protect your margins forever.

£14.99 lifetime
Simple Pricing

Pay Once. Protect Your Margins Forever.

Lifetime Access
£14.99one-time

Pay once, protect your margins forever. No subscriptions, no upsells, no hidden fees.

  • Instant auto-scrape on any eBay listing
  • Accurate fee math for UK & US listings
  • Floating profit widget on eBay pages
  • Free tier: 5 history records
  • Pro: Unlimited flip tracking
  • Pro: Custom fee rates for your store tier
  • Lifetime updates & support
Install on Chrome

Stop Guessing. Start Profiting.

Install eBay Profit Guardian today. Know your exact margin on every listing — £14.99 lifetime, no subscriptions.

Install on Chrome