Over 1000 merchants trust OneCart to automatically sync inventory, centralize orders, and save 10+ hours weekly managing their WooCommerce and Shopify stores.
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Connect WooCommerce and Shopify in under 10 minutes with OneCart's guided setup.
Running a self-hosted WooCommerce store on WordPress alongside a Shopify store is common, whether you are migrating a catalogue across or keeping both storefronts live. Maintaining stock and products in two systems by hand is where it gets painful. OneCart links a WooCommerce store and a Shopify store so one inventory pool feeds both, with your marketplaces managed from the same dashboard.
WooCommerce and Shopify share one stock pool in OneCart. When a sale happens on either store, OneCart reduces the matching SKU on the other, so the same unit is not promised twice across your two storefronts. Negative stock is sent as zero to help prevent overselling.
Orders from both your WooCommerce site and Shopify store are brought into OneCart automatically and arrive in one dashboard, so you fulfil from a single queue instead of switching between your WordPress backend and Shopify admin.
Manage your catalogue once in OneCart and keep it aligned across both storefronts. Map each Variant SKU in OneCart to the matching SKU on WooCommerce and on Shopify so quantities update the correct product on each store.
Connect WooCommerce with REST API keys. In your WordPress backend go to WooCommerce > Settings > Advanced > REST API and click Add Key. Set the Description to OneCart, pick an admin user, set Permissions to Read/Write, and click Generate API key. Save the API Key, API Secret, and your site URL, and make sure the Legacy API is enabled. If you run a firewall such as Cloudflare, whitelist the OneCart app first.
Add the WooCommerce store to OneCart with those credentials at app.getonecart.com/shops/new?platform=WooCommerce.
Connect Shopify: go to Settings > My Platforms > Manage Connections and click Add shop for Shopify. Install the OneCart app when Shopify prompts you, log in to the Shopify store, then log in to OneCart. A green banner confirms Shopify is connected. From there manage both storefronts from one product list, mapping each Variant SKU in OneCart to the matching SKU on each store.
Keep products and stock aligned across your WordPress store and your Shopify store from OneCart, so a move between them, or running both at once, does not mean editing two systems by hand.
When a unit sells on WooCommerce, OneCart reduces the matching SKU on Shopify and the reverse holds too, so neither store promises stock the other has already sold.
Everything you need to know about connecting WooCommerce and Shopify with OneCart.
REST API credentials. In WooCommerce > Settings > Advanced > REST API, add a Read/Write key for an admin user, save the key, secret, and site URL, and enable the Legacy API. If a firewall such as Cloudflare is active, whitelist the OneCart app. Shopify connects differently, by installing the OneCart app from Manage Connections.
Yes. OneCart is multi-channel, so alongside your WooCommerce and Shopify stores you can add marketplaces like Shopee, Lazada, TikTok Shop, and Amazon and manage them all from one dashboard.
Yes. OneCart keeps products and stock aligned across your WordPress store and your Shopify store from one place, so a move between them, or running both at once, does not mean maintaining two systems separately.
OneCart has plans for sellers at different order and SKU volumes, so the right plan depends on how much you sell. You can compare plans and what each includes at /pricing/.
Here's what businesses like yours have achieved by connecting WooCommerce and Shopify.
"OneCart didn't just fix our operations, it gave me my sanity back. After struggling with platforms that broke everything, I finally found a system that's reliable, affordable, and backed by real support. If you're still not on OneCart, you're leaving time, money, and peace of mind on the table."

"OneCart saved our business during the pandemic. Stock automatically syncs between platforms and I can manage everything remotely. We've cut inventory discrepancies by 100% and fulfillment time by 75%."

"Order processing that used to take 3 hours now takes just 20 minutes with OneCart. Our warehouse efficiency increased 400%, deliveries are faster, and customer satisfaction scores are up 32% since implementation."

"The OneCart team's support is outstanding. When we needed help expanding to Shopify, they worked with us one-on-one until everything was perfect. We've increased sales by 47% with no additional staff since connecting our platforms."






Expanding to Shopify from WooCommerce used to take days. OneCart makes it happen in hours. Copy your entire product catalog with one click - complete with descriptions, images, variants, and pricing. Get selling on Shopify without the manual work.
"I expanded to Shopify in a single afternoon using OneCart. What would have taken my team a week took just hours."
The average multi-channel seller loses $2,000+ monthly to inventory discrepancies. OneCart eliminates this entirely. When a product sells on WooCommerce, we instantly update Shopify's stock level, and vice versa.
Manage everything from one dashboard. Set low-stock alerts, track inventory across warehouses, and make bulk adjustments that apply to all your sales channels instantly.
"Since using OneCart, we've completely eliminated overselling issues that used to cost us thousands monthly."
Stop the daily platform-switching nightmare. OneCart consolidates all your WooCommerce and Shopify orders into a single, intuitive dashboard. See everything at a glance and fulfill orders in batches.
Our customers report processing times dropping from hours to minutes. Faster fulfillment means happier customers, better reviews, and higher platform rankings.
"Order processing that took 3 hours now takes 20 minutes. OneCart completely transformed our fulfillment process."
See how much you could save by connecting WooCommerce and Shopify with OneCart.
The all-in-one solution for WooCommerce & Shopify sellers who want to grow without the headaches.
Never worry about stock levels again. Our instant, 24/7 synchronization updates WooCommerce and Shopify within seconds of any change.
Cut admin work by 75%. Automate the tedious tasks of updating multiple platforms and reconciling inventory discrepancies.
Manage products, inventory, and orders for WooCommerce, Shopify, and all your other channels from one intuitive interface.
Add new sales channels or handle 10X order volume without adding staff. OneCart scales with your business without added complexity.
Get help when you need it. Our responsive team is based in Singapore and provides personalized assistance for your integration.
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Everything you need to know about connecting your stores with OneCart.
OneCart creates a real-time connection between your stores that works 24/7:
This happens automatically without any manual work, preventing overselling and inventory discrepancies that cost merchants thousands in lost sales and customer goodwill.
Our customers report saving 75-90% of the time previously spent on order management:
For a merchant processing 50 orders daily across multiple platforms, this typically saves 2-3 hours every day, time you can invest in growing your business instead.
Most merchants complete the basic setup in under 10 minutes:
Your inventory will begin syncing immediately. Our onboarding team is available to help if you need assistance, and we offer premium onboarding services for larger merchants with complex requirements.
OneCart is designed for complex catalogs with variations, bundles, and kits:
This ensures that even sophisticated product catalogs with thousands of SKUs and variations maintain perfect accuracy across all your sales channels.
OneCart scales to support businesses of all sizes:
We have clients ranging from small merchants with 10 orders/day to large enterprises processing thousands of orders daily across multiple channels. The system is designed to grow with your business.
Our integration experts are ready to help you connect WooCommerce and Shopify seamlessly.
Our simple 3-step process gets you up and running fast.
Create your OneCart account and connect your WooCommerce and Shopify stores through our guided setup.
Time: 10 minutes
Choose how products, inventory, and orders sync between platforms based on your business needs.
Time: 15 minutes
Begin managing your WooCommerce and Shopify stores from one dashboard with real-time synchronization.
Time: Immediate
Most merchants complete setup in under 30 minutes!
Start Your Free 14-Day TrialJoin 1,000+ merchants who have automated their WooCommerce and Shopify operations with OneCart.
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