Shopify's launched Canvas, a new way for its merchants to design an online store just by talking to an AI agent. The company announced it on 1 October. Canvas lays every page of a store out side by side, and Shopify's agent, Sidekick, rewrites the store's design as the merchant describes what they want.

Shopify says Canvas is rolling out over the coming days, and for now its help centre calls it early access for "certain stores". It only works on desktop, and it isn't replacing Shopify's existing theme editor yet.

What Shopify's Canvas does

In its announcement, Shopify describes Canvas as "a new design surface where merchants build with Sidekick, Shopify's AI agent." The idea is to turn the whole store into one big workspace, instead of a settings panel you work through page by page.

Photo: Raysonho @ Open Grid Scheduler / Grid Engine / Wikimedia Commons (CC0)

When a merchant opens it, every page of the store is laid out together. They can pan across to get a feel for the store as a whole, then zoom in on one product page or one banner. They can still click on something and change it by hand. Or they can type in a chat box and ask Sidekick to do it.

As Sidekick works, the changes show up in Canvas straight away. And Shopify says it's not a mock-up. Merchants are looking at "a render of the real code behind the store," so they can click through pages with full interactivity and animation, and check how they look with different products, collections and screen sizes.

TechCrunch's Sarah Perez explained why that's a big deal. Shopify's old no-code builder worked by shuffling modular sections and blocks around inside whatever theme you'd chosen. Anything deeper meant editing code yourself or paying a developer. With Canvas, the agent edits the theme's code for you.

How Sidekick builds a store

Sidekick isn't new. Shopify says it's been writing code for a while, building apps and custom theme sections, and that it made more than 25 million edits to themes in the first half of 2026.

What's changed is how much of a store it can take on at once. Shopify says Sidekick now works directly on a theme's files, guided by instructions and skills for building stores. The company also simplified how its themes are put together, so the agent can more easily understand a store's structure, logic and design.

The agent checks its own work, too. Shopify says it validates its code and takes screenshots of how its changes came out, then uses both to keep refining the result in a loop before handing it back. Because the merchant and Sidekick are looking at the same render, they can go back and forth quickly.

Shopify says Sidekick asks questions, suggests approaches and remembers preferences, so merchants don't have to keep repeating decisions they've already made.

Austin Knight, a design director at Shopify, said the code wasn't the hard part. "Getting Sidekick to write code was easy, but guiding it to make good design decisions took a great deal of time and attention," he said in the announcement. He said each theme has "a unique design contract, a curated set of patterns to draw from, and a mountain of opinionated eval data."

Twenty minutes instead of two weeks

Ben Sehl, Shopify's director of product and a co-founder of the clothing brand Kotn, painted the clearest picture of what Shopify's going for.

"When I built Kotn 12 years ago, I knew how to code and it still took me two weeks to get a rough store working," he said in Shopify's announcement. "Today, an entrepreneur on Shopify can build a fully custom store in twenty minutes that's head and shoulders above what I built then."

That's Shopify's claim, and it's a big one. It also fits a wider shift. TechCrunch points out that Canvas joins AI site builders from Wix, Squarespace, Webflow and Framer, plus so-called vibe-coding tools like Lovable and Replit.

For small sellers, the upside is simple. A store that looked custom used to need either design skills or money for a developer. Shopify says it wants bespoke to stop being "the path of most resistance."

What Canvas can't do yet

Shopify's upfront that it's early days. "We're early here and Canvas is not replacing the existing editor yet," Sehl said. "Things will change quickly, and there are gaps we still need to close."

The company's requirements page spells those gaps out. Canvas only works on desktop, and only on plans that include theme customisation. It works with themes made by Shopify and with custom themes, but not with third-party themes from other designers. And staff need permission to edit theme code before they can open it.

There are trade-offs once a theme's been through Canvas. Shopify says that theme stops getting theme updates, and its files can't be downloaded. Merchants can't translate theme content inside Canvas, so they'll need Shopify's Translate & Adapt app. They can't tailor a theme for different markets in Canvas, and they can't add or set up app blocks or app embeds. New blocks have to be requested from Sidekick, not dropped in by hand.

TechCrunch reports Shopify told it that support for third-party themes, app blocks and extensions, markets, translations, rollouts and theme updates is planned over time.

Why it matters for online sellers

Design isn't the only thing sellers think about when they pick a platform, and every platform comes with its own risks. In September we reported on StyleSmuggler, a zero-day that hit Magento and Adobe Commerce stores before Adobe shipped a fix.

Canvas also raises a fair question for anyone handing design work to an AI. What happens when the agent gets it wrong? Shopify's answer is to keep the merchant watching every change as it lands. And Unite.AI reports that Canvas changes only reach customers once the merchant publishes them, and that a theme can be restored from its version history.

If you run a Shopify store and want to give it a go, check your theme first. If it came from a third-party designer, Canvas won't open it yet. And if you rely on translations, market-specific versions or app blocks, it's worth trying Canvas on a copy of your theme before you lean on it.