How to Migrate 10,000+ Products from Magento to Shopify

If you're running 10,000+ products on Magento and thinking about Shopify, the product migration is the part everyone dreads — and for good reason. Get it wrong and you're looking at missing images, broken variants, corrupted pricing, and product IDs that no longer match your warehouse system. This guide covers exactly how to do it right.

Why Large Catalog Migrations Are Different

Moving 50 products is a copy-paste job. Moving 50,000 is a data engineering problem. At scale, the issues that trip up store owners aren't the obvious ones — it's the edge cases: products with 150+ variants, multilingual descriptions, custom attributes that don't exist in Shopify's data model, or image filenames with special characters that break on import.

Magento's product catalog is also deeply relational. You have configurable products, simple products, grouped products, bundle products — all linked together. Shopify has a flatter structure: products with variants. That mismatch is what makes the migration non-trivial.

Step 1: Audit Your Magento Catalog Before You Move Anything

Before touching a migration tool, spend two to three days auditing your Magento data. This is not optional. Pull an export of your full catalog and look for:

• Duplicate SKUs — Shopify requires unique SKUs. Duplicates will cause import failures.
• Products with more than 100 variants — Shopify's standard variant limit is 100 per product. Anything over that needs to be restructured using Shopify's variant metafields or split into separate products.
• Missing or broken image URLs — If your Magento images are referenced by URL rather than file path, verify all of them resolve before migration day.
• Custom attributes — Magento lets you create unlimited product attributes. Shopify uses metafields for custom data. Map every custom attribute in your Magento catalog to a Shopify metafield definition before you start.
• Configurable vs. simple product relationships — Document how your configurable products are structured. This determines how you'll map them to Shopify products and variants.

A clean audit typically takes 2–3 days for a catalog of 10,000–50,000 products. It will save you a week of post-migration fixes.

Step 2: Choose the Right Migration Method for Your Volume

There are three approaches for large-scale migrations. Which one you use depends on your catalog complexity and your technical resources.

Option A: Matrixify (formerly Excelify)
This is the most powerful Shopify import tool available and the one TheDeki uses for the majority of large migrations. Matrixify supports bulk imports via Excel or CSV, handles metafields, multi-location inventory, product redirects, and can process hundreds of thousands of rows without failing. It costs $20–$200/month depending on volume, and it's worth every dollar. For 10,000+ products, this is usually the right choice.

Option B: Direct API migration
If you have a developer on your team or you're working with an agency, a custom script using the Shopify Admin API gives you the most control. You write the mapping logic yourself, which means you can handle any edge case — but it also takes significantly more time to build and test. For catalogs with complex custom attributes or unusual product structures, this is often necessary.

Option C: Third-party migration services (LitExtension, Cart2Cart)
These automated services can move your products in hours, but they're a black box. You get less control over data mapping, and for complex Magento catalogs, you'll often end up with messy data that needs significant manual cleanup. They work well for simple catalogs under 5,000 products. At 10,000+ with any complexity, they tend to create more work than they save.

Step 3: Map and Clean Your Product Data

Before running any import, build a data map — a spreadsheet that defines exactly how each Magento field maps to a Shopify field. This includes:

• Magento sku → Shopify Variant SKU
• Magento name → Shopify Title
• Magento description → Shopify Body HTML
• Magento price → Shopify Variant Price
• Magento configurable attributes → Shopify Option1 Name / Option1 Value
• Magento custom attributes → Shopify Metafields (define namespace and key)
• Magento category path → Shopify Collection (manual or via tags)

Once you have the map, clean your data. Strip HTML from fields that shouldn't contain it, normalize pricing (remove currency symbols, standardize decimal places), and fix any encoding issues in your product descriptions. UTF-8 encoding issues are common when exporting from older Magento 1 installations.

Step 4: Run a Test Migration — Always

Never run your full catalog migration directly into your live Shopify store. Create a development Shopify store (free with any Shopify Partner account) and run a test migration with a representative sample — at least 500–1,000 products covering all your product types and edge cases.

After the test import, manually verify:

1. Product titles, descriptions, and images loaded correctly
2. All variants are present with correct SKUs and pricing
3. Metafields are populated and showing correct values
4. Collections have been assigned correctly
5. Inventory quantities are accurate
6. Product URLs are set up (or redirects are in place from your old Magento URLs)

Fix any data issues in your source file before running the full migration. This is the step most stores skip — and it's why they end up with thousands of broken product listings to clean up after launch.

Step 5: Run the Full Migration and Verify

With a clean test migration behind you, run the full import. For very large catalogs (100,000+ products), run in batches of 10,000–20,000 rows to make failures easier to diagnose and re-run.

After the full import completes:

• Cross-check total product count against Magento (allow for any products you intentionally excluded)
• Spot-check 50–100 products manually, covering all product types
• Run a bulk export from Shopify and compare against your Magento export for any discrepancies
• Verify all product images have loaded (Shopify downloads images from URLs asynchronously — give it 30–60 minutes after import)
• Confirm that 301 redirects are in place for all old Magento product URLs

The redirect step is critical for SEO. Magento and Shopify use different URL structures. Without redirects from your old Magento product URLs to your new Shopify URLs, every product page with backlinks or Google rankings loses that equity overnight.

What Gets Left Behind (and What to Do About It)

A few Magento features don't have direct Shopify equivalents and need a workaround or a third-party app:

• Tier pricing (quantity discounts) — Use Shopify's B2B features (Shopify Plus) or an app like Wholesale Gorilla
• Layered navigation / faceted search — Replace with a search app like Searchie or Boost Commerce
• Grouped products — Restructure as product bundles using an app, or as individual products with cross-sells
• Customer group pricing — Available natively in Shopify Plus; use an app on standard Shopify plans

Ready to Migrate? Don't Do It Alone.

A 10,000+ product migration from Magento to Shopify is a significant technical undertaking. Done correctly, it takes 3–6 weeks of preparation, testing, and execution. Done incorrectly, it can take months to clean up — and in the worst cases, it damages your SEO rankings and disrupts your business operations.

TheDeki specialises in Magento to Shopify migrations for complex, large-catalog stores. We handle the full process: catalog audit, data mapping, custom migration scripting, SEO redirect mapping, and post-migration QA — so you launch on Shopify with clean data and zero surprises.

Book a free migration consultation with TheDeki and let's scope your migration properly before you start.