01
Connect Your GS1 Prefix
Enter your GS1 Company Prefix. The app detects your region and shows how many GTINs you have left in it.
Assign, manage GTIN, UPC and EAN in your store.
Reduce manual work. Save time. Prevent errors. Your products appear in Verified by GS1 shortly after.
Works with your GS1 organization
GS1 US
GS1 Germany
GS1 Sweden
GS1 Netherlands
GS1 Brazil
List everywhere with numbers you own.
Meets Shopify’s Built for Shopify quality standard.
5.0/5
Shopify App Store rating
20,000+
Products & variants per store
Global
Ready-to-upload GS1 file formats
4
Direct GS1 API connections
Why Merchants Switch
The same barcodes, minus the hours of admin work
Spreadsheets, GS1 portals, manual data entry. It costs you hours, and it costs you listings. Do all of it inside Shopify instead.
The Old Way
- Copy-paste from GS1 portal into Shopify, one at a time
- Cross-check every code on the GS1 website by hand
- Eyeball your spreadsheet and hope for the best
- Get rejected, then guess what went wrong
- Leave Shopify and log into your GS1 portal
- Remember to assign a barcode to every new product
With GS1 Assistant
- Select products, click Assign. Done in seconds.
- Instantly spot invalid GTINs in the dashboard
- Duplicate detection across your whole catalogue
- Verified by GS1 status you can see before you list
- Track your full GS1 prefix in one place, inside Shopify
- Shopify Flow auto-assigns GTINs to new products
Capabilities
The tools your barcodes actually need
Assign, validate, and export. All inside Shopify, all from the number block you already own.
GTIN Manager Dashboard
See every product’s barcode status at a glance: Assigned/Unassigned, Valid/Invalid, and Duplicates. Find problems before marketplaces do.
Bulk & Auto Assign
Assign GTINs to your entire catalogue in batches. Connect Shopify Flow to auto-assign when new products are created (Pro plan).
Real-Time GS1 Verification
Every barcode is validated against GS1’s official registry before assignment, correct before Amazon or Walmart see it.
Ready-to-Upload Export Files
Download a ready-to-upload file in your GS1 organization’s import format.
Duplicate & Error Detection
Catch duplicate GTINs, invalid check digits, and barcodes that don’t belong to you, before they cause rejections.
GS1 Registry Connection
Direct API connection with GS1 Germany, Sweden, Netherlands and Brazil, where your products are synchronized automatically. Everywhere else, download a file in your GS1 organization’s import format.
Get Started
Three steps. That’s it.
Easy to use, even if you’re new to GS1. If you have a GS1 Company Prefix, you’re ready. If you don’t, our GS1 Company Prefix setup guide for Shopify covers getting one.
02
Assign GTINs to Products
One product or your whole catalogue. The app takes the next available codes from your prefix, without duplicates.
03
Sell Everywhere With Numbers You Own.
List on Amazon, Google Shopping, Walmart, eBay, Etsy or wholesale with GTINs licensed to your business.
Social Proof
What merchants actually say
Rated 5.0/5 on the Shopify App Store across 10+ reviews.
★★★★★
“We run a Shopify store with more than 20,000 SKUs and manage our own GS1 Norway company prefix. Before GS1 Assistant, our workflow relied on manual Excel spreadsheets, GS1 imports, and countless hours of administrative work.”
★★★★★
“The best thing available for GS1 code management. We have no prior knowledge and the app makes it extremely easy to navigate the complex world of EANs, GTINs etc. Support is also 5 stars.”
★★★★★
“An incredibly helpful and time-saving tool! It takes the guesswork out of product identification and helps ensure everything is formatted and validated correctly.”
★★★★★
“GS1 Assistant has made managing UPC codes effortless. Assigning GTINs is simple, and products appear in Verified by GS1 shortly after.”
★★★★★
“I needed urgently to create GTIN codes for our older stock (600 SKUs). This app saved me 2 days of work!”
★★★★★
“A must-have for any Shopify store managing UPC, EAN, or GTIN barcodes. Accurate assignments without duplicates. Great sync with my GS1 prefix.”
Product Demo
See GS1 Assistant in action
A walkthrough of assigning and verifying barcodes inside Shopify, start to finish.
Start free. Upgrade when you need to.
The free plan covers 20 GTIN assignments. Every plan includes validation, duplicate detection and export. Paid plans only raise the assignment limit.
Monthly
Annual Save up to 24%
Free
$0 /mo
Up to 20 GTIN assignments
- ✓ GTIN Validation (Format & Check Digit)
- ✓ GTIN Status Visibility (OK/Discontinued)
- ✓ Duplicate GTIN Detection
- ✓ Verified by GS1 Status & Details
- ✓ Manage Your Company Prefixes
- ✓ Multiple Region Export Format Support
- ✓ API Access (where supported)
Basic
$4.99 /mo $49.99 /yr
$49.99/yr (save 17%) $4.17/mo equivalent
Up to 500 GTIN assignments
- ✓ GTIN Validation (Format & Check Digit)
- ✓ GTIN Status Visibility (OK/Discontinued)
- ✓ Duplicate GTIN Detection
- ✓ Verified by GS1 Status & Details
- ✓ Manage Your Company Prefixes
- ✓ Multiple Region Export Format Support
- ✓ API Access (where supported)
Most Popular
Pro
$11.99 /mo $110 /yr
$110/yr (save 24%) $9.17/mo equivalent
Unlimited GTIN assignments
- ✓ GTIN Validation (Format & Check Digit)
- ✓ GTIN Status Visibility (OK/Discontinued)
- ✓ Duplicate GTIN Detection
- ✓ Verified by GS1 Status & Details
- ✓ Manage Your Company Prefixes
- ✓ Multiple Region Export Format Support
- ✓ API Access (where supported)
All charges are billed in USD through Shopify. Monthly plans renew every 30 days, annual plans once a year. Cancel any time from your Shopify admin.
Support
Common questions before you install
Do I need a GS1 Company Prefix before I install?
Yes. GS1 Assistant uses your GS1 Company Prefix to assign valid barcodes. The app doesn’t sell or generate its own codes. If you don’t have a prefix yet, purchase one from your local GS1 member organization. US merchants can also purchase directly through the app.
Will this fix my Amazon or Google Shopping GTIN rejections?
If rejections are caused by invalid or missing GTINs, yes. GS1 Assistant assigns codes from the GS1 Company Prefix you already own and checks them against GS1’s database. Amazon and Walmart go further and verify identifiers against GS1’s data, which is where a resold number gets caught.
What’s the difference between UPC, EAN, and GTIN?
They’re the same numbering system at different lengths. UPC is 12-digit (North America). EAN is 13-digit (Europe and global). GTIN is the umbrella term. GS1 Assistant handles all of them.
Does it work with GS1 organizations outside the US?
Yes. GS1 Assistant has direct API integration with GS1 Germany, Sweden, Netherlands and Brazil, so products in those countries are synchronized automatically and appear in Verified by GS1 shortly after. Every other region is supported through your GS1 organization’s import format: download a ready-to-upload file.
What happens to my barcodes if I uninstall the app?
GTINs that GS1 Assistant has already assigned stay in your Shopify barcode fields. Uninstalling the app does not remove or change your product data.
My products already have barcodes. Can I still use GS1 Assistant?
Yes. GS1 Assistant scans your existing barcodes and shows the validity status of each one. You can bulk-unassign the invalid ones and assign GTINs from the prefix you already own, formatted and validated correctly, without duplicates.
Is this different from buying cheap barcodes online?
Yes. Reseller barcodes are not registered to your company. Amazon and Walmart verify identifiers against GS1's data, and a mismatch gets the listing rejected. GS1 Assistant only assigns codes from your own GS1 Company Prefix, so they are verified by GS1, not just generated.
How many products can the app handle?
GS1 Assistant supports catalogues of 20,000+ variants, and the Pro plan assigns unlimited GTINs. One merchant assigned GTINs to 600 SKUs and saved two days of manual work.
What languages is the app available in?
GS1 Assistant is available in English, German, Italian, Dutch and Portuguese (Brazil).
What does GS1 Assistant cost?
The free plan assigns up to 20 GTINs. Basic is $4.99 a month for 500 GTINs. Pro is $11.99 a month for unlimited GTINs. All charges are billed in USD through Shopify, and you can cancel any time from your Shopify admin.
What data does the app access in my store?
GS1 Assistant accesses your products and collections. It reads your existing barcodes and writes assigned GTINs into your Shopify barcode fields. It does not need access to orders or customer data.
Take the guesswork out of your barcodes.
Every invalid GTIN is a rejected listing waiting to happen. GS1 Assistant catches them before the marketplaces do.
Questions? Fast, responsive support, usually from the developer himself.
Free plan available · Built for Shopify certified · Cancel anytime