Browser extensions · 2026
Amazon ベストプライス
See the real unit price behind Amazon variations.
A Chrome extension that turns Amazon.co.jp's inconsistent product variations into comparable unit prices, so a cheap-looking bundle cannot hide a worse deal.
Screenshots
Compare unit prices and spot better bundles. 
See equally good options. 
Compare across variation groups.
Built after getting tired of comparing sheet counts, bottle sizes, cable lengths, and awkward multipacks by hand.
It normalizes count, weight, volume, length, and area in the browser, marks the best-value option, shows the math, and catches cases where buying smaller packs twice is cheaper.
Built with
- TypeScript
- React
- WXT
- Chrome MV3
