Virtual Try-On for Headless Shopify and Hydrogen Stores

Going headless gives you full control of the storefront. It also hands you the job of rebuilding every feature an app used to install in one click. Try-on is one of those features.

Can you add virtual try-on to a headless Shopify store?

You can, and the build is smaller than it sounds. A try-on button needs a photo upload, one server call and a place to show the result. All three are ordinary parts of a React storefront.

What you give up is the shortcut. On a standard theme you would add our Shopify app block in the theme editor and be done by lunch. On Hydrogen there is no theme editor to add it to.

Why do most Shopify apps miss headless stores?

Many apps put their storefront features into theme app extensions, which plug into Online Store 2.0 themes. Merchant community threads and agency guides keep reporting the same result: on Hydrogen, some of those apps do not appear and others need to be wired back in through the API. Shopify's own docs are the final word, so check them for the app you are eyeing.

The Corlen Shopify app is a theme app block, so we tell headless merchants plainly to use the API instead. We would rather you hear that before you buy than discover it while staring at an empty storefront.

How does try-on work on Hydrogen?

The flow is the same on any custom storefront. Your catalog stays in Shopify, and only the try-on call lives in your code:

1. Read the product's garment image through the Storefront API, as you already do for the gallery.
2. Add a button and a photo upload to the product route.
3. Post the photo and the garment image to a server route in your app.
4. Have that route call the Corlen API with your key and start a job.
5. Poll the job from the page, then show the finished image.

The request fields and job states are in the API docs, and the developer guide walks through the full flow. If you have already read our BigCommerce guide, the shape will look familiar: platforms differ, the server call does not.

Picture a store that moved to Hydrogen for speed and a custom product page. A try-on button should feel like part of that page, not a widget bolted on. With the API you own the button, the upload step and the loading state, so it can match the rest of the design.

You also own the error handling. A shopper who uploads a blurry photo or loses signal should see a clear message and a retry, not a spinner that never ends. Budget a little time for that part, because it decides how the feature feels.

What goes wrong on a custom storefront?

• The key in the browser: keep it in a server only variable. A key in client code is public, whatever you named the file.
• Large phone photos: resize before upload, or the request is slow and some hosts reject it.
• Edge runtime limits: a long generation can outlast a short request limit, so start a job and poll rather than waiting on one request.
• Logging uploads: your own server should not store or log shopper photos. Corlen on the API does not save them, and your route should match.

Is it worth the build?

If you already have developers on the storefront, it is a small feature on a project they own. If you have no developer, headless was probably a heavier choice than the store needed, and a standard theme with the app block would be cheaper to run.

Before any code, run your hardest garments through the live demo. Good product photos matter more than the framework, so see how to photograph clothing for virtual try-on. Once it ships, track it with how to measure virtual try-on results.