Postcode Helper by SYNQ

One-click postcode picker for Amazon's location dialog across 20+ marketplaces. By SYNQ — Ads, Automation, Analytics.

Postcode Helper by SYNQ Change your Amazon delivery postcode in one click — across every Amazon marketplace. If you're an Amazon seller, agency, or marketer, you already know the drill: hop between amazon.com, amazon.de, amazon.co.uk, amazon.co.jp and the rest to check Buy Box behavior, localized pricing, delivery promises, or product availability. Each one needs a country-specific postcode. Remembering them all is impossible. Looking them up every time is slow. Postcode Helper fixes that. When you open Amazon's "Choose your location" dialog, a small panel appears above the postcode field with the top 5 cities for that country — pre-filled, validated, ready to click. ────────────────────────────────────────── WHAT IT DOES ────────────────────────────────────────── • Auto-detects which Amazon marketplace you're on (.com, .de, .fr, .co.uk, .it, .es, .se, .pl, .com.be, .com.tr, .co.jp, .com.au, .ca, .com.mx, .com.br, .in, .sa, .ae, .sg, .eg) • Shows 5 curated city + postcode chips, picked for the country • One click fills Amazon's postcode field — no typing, no copy-paste • Handles Canada's split FSA + LDU input format automatically • Add your own custom postcodes (per country), saved across your Chrome installs via chrome.storage.sync • Toolbar popup for managing your saved customs and as a fallback fill on tabs where auto-injection didn't catch the dialog ────────────────────────────────────────── BUILT FOR ────────────────────────────────────────── • Amazon sellers running on multiple marketplaces • Marketing managers checking localized ads, search results, and Buy Box • Agencies auditing client storefronts across regions • Anyone who tests Amazon UX in different countries ────────────────────────────────────────── HOW IT WORKS ────────────────────────────────────────── 1. Click "Deliver to" in Amazon's header. 2. The Postcode Helper panel appears above the postcode input. 3. Pick a city. Done. Need a specific city not on the list? "+ Add custom" saves yours forever. ────────────────────────────────────────── PRIVACY ────────────────────────────────────────── • No tracking. No analytics. No automatic data collection. • Your custom postcodes are stored in chrome.storage.sync (synced across your own Chrome installs via your Google account; nothing leaves it). • The extension only runs on Amazon storefronts (see the marketplaces list above). • The only data that ever leaves your device is what you explicitly type into the optional "Share feedback / Report a bug" form (your message, and — if you choose to add them — your name, email, and a screenshot). It is sent to SYNQ so we can read and act on your feedback. Nothing is sent unless you fill in that form and click send. Full privacy policy: https://wearesynq.com/legal#privacy ────────────────────────────────────────── ABOUT SYNQ ────────────────────────────────────────── SYNQ is an advanced advertising agency helping US & European marketplace sellers dominate through performance marketing, data analytics, and cutting-edge tech. We're based in Berlin, Munich, and Barcelona. More from SYNQ: • SYNQ Amazon Tools (our flagship Chrome extension): https://chromewebstore.google.com/detail/SYNQ%20Amazon%20Tools/idnobhokapnhfpamifmfnfkcckchhjon • Amazon Ads Raw — YouTube channel: https://www.youtube.com/@AmazonAdsRaw • Free tools (ACOS calculator, LTV, N-Gram, bid optimizer, more): https://www.wearesynq.com/free-tools • Agency: https://www.wearesynq.com ────────────────────────────────────────── OPEN SOURCE ────────────────────────────────────────── Source code and issue tracker: https://github.com/AlexWho3000/AmazonPostcodeHelper Bug reports and feature requests welcome.