Shopify Information

Technical and Developer Tools in Shopify

Last modified: May 26, 2026

Updated May 26, 2026 Expert reviewed

Shopify gives store owners and developers two different toolsets sitting on top of the same platform. For store owners, the technical layer is a set of settings you toggle and snippets you paste: SSL, CSS edits, analytics, tracking pixels, cache, API keys, CSV imports. For developers, it’s a full stack: the Shopify CLI, Shopify Functions for backend customization, Hydrogen for headless storefronts, GraphQL Admin and Storefront APIs, theme development through GitHub, webhooks, and metaobjects. This guide covers both sides, with deeper how-to walkthroughs linked from each section.

None of the store-owner tasks below require a development background. The developer-tools section is a quick map of what each piece does so you know what to reach for when a project actually needs custom code.

Shopify Developer Tools

The developer-facing side of Shopify is bigger than most merchants realize. Here are the pieces a developer or technical agency actually uses day to day.

Shopify CLI

The Shopify CLI is the command-line tool that scaffolds and tests apps, themes, and Hydrogen storefronts locally before pushing them live. It handles dev store creation, theme pull/push, app extension scaffolding, and local preview. If you’re building anything custom on Shopify, this is usually the first thing you install.

Shopify Functions

Functions let you write custom logic that runs inside Shopify’s own backend, things like custom discount rules, delivery customizations, payment customizations, and cart validations. They run in a WebAssembly sandbox and execute fast enough to be safe on the cart and checkout path, which is why they replaced the old script-tag and Shopify Scripts approach.

Hydrogen and Oxygen

Hydrogen is Shopify’s React-based framework for building custom storefronts that pull product data from Shopify but render their own front end. Oxygen is the hosting layer Shopify provides for Hydrogen storefronts. Together they’re the headless option for brands that want a fully custom shopping experience without giving up Shopify’s cart, checkout, and inventory backend.

Admin API and Storefront API

Shopify exposes two main GraphQL APIs. The Admin API is what apps and integrations use to read and write store data on the merchant’s behalf, including products, orders, customers, and inventory. The Storefront API is the public-facing one that custom storefronts and mobile apps use to fetch product and cart data for shoppers. Both are GraphQL-first; older REST endpoints still exist for some resources but Shopify is moving everything to GraphQL.

Theme development

Themes are built with Liquid, Shopify’s templating language, plus standard HTML, CSS, and JavaScript. Modern theme development uses the CLI for local preview and a GitHub integration so you can version-control themes and deploy through pull requests instead of editing files directly in the admin.

Webhooks, metaobjects, and metafields

Webhooks notify your app or external service when something happens in the store (order created, product updated, customer registered) so you don’t have to poll. Metafields and metaobjects let you store structured custom data against products, variants, collections, customers, and orders, which is useful when you need fields the standard schema doesn’t offer (size guides, ingredient lists, B2B price tiers, anything bespoke).

Dev stores and the theme inspector

A development store is a free Shopify store you create for building and testing. It can be set up to mimic real configurations (Plus features, multiple currencies, B2B) without billing. The Theme Inspector is a Chrome extension that profiles theme Liquid rendering so you can find the slow parts of a page and fix them.

Customization and Security

Editing CSS in Shopify

CSS controls how your store looks: fonts, colors, spacing, layout, and every visual detail that sits between your theme’s default appearance and the store you actually want. Shopify gives you access to your theme’s CSS files directly through the theme editor, which means you can make precise visual changes without touching anything structural. The guide on how to edit CSS in Shopify covers how to find the right file, how to make changes safely, and how to test edits without breaking anything on your live store.

Enabling SSL on Shopify

SSL is what puts the padlock icon in the browser bar and the “https” in your store’s URL. It encrypts the connection between your store and your customers, protects sensitive data during checkout, and is a baseline requirement for customer trust and search engine ranking. The guide on how to enable SSL on Shopify covers how SSL works on Shopify, how to make sure it’s active on your store, and what to check if your store is showing as unsecured despite having a custom domain connected.

API and Access

Getting a Shopify API key

The Shopify API is what allows third-party apps, custom integrations, and developer tools to connect to your store and interact with your data. To use it, you need an API key, which acts as the credential that identifies your app or integration to Shopify. The guide on how to get a Shopify API key walks through how to create a custom app in your Shopify admin, where to find the API key once the app is set up, and what permissions you need to enable depending on what the integration will be doing.

Getting a Shopify access token

An access token is what your app or integration actually uses to authenticate requests to the Shopify API after the initial setup. It’s separate from the API key and needs to be retrieved and stored correctly at the point of app creation, because Shopify only shows it once. The guide on how to get a Shopify access token covers where to find it, what to do if you missed it the first time, and how access tokens work alongside API keys in practice.

Analytics and Tracking

Adding Google Analytics to Shopify

Google Analytics gives you a detailed picture of how people find your store, what they do once they’re there, and where they drop off before buying. Connecting it to Shopify means you can track sessions, traffic sources, conversion rates, and product performance in one place. The guide on how to add Google Analytics to Shopify covers how to set up a Google Analytics property, how to connect it to your Shopify store, and how to verify that data is flowing correctly after setup.

Adding tracking code in Shopify

Beyond Google Analytics, you may need to add tracking codes for other tools: Facebook Pixel, TikTok Pixel, heat mapping software, affiliate tracking, or any number of other third-party services that require a snippet of code to be placed on your store. The guide on how to add tracking code in Shopify covers where tracking code lives in Shopify, how to add it correctly so it fires on the right pages, and what to watch out for when managing multiple tracking scripts at once.

Excluding your own IP address from Shopify stats

Every time you visit your own store to check something, test a page, or preview a change, that visit gets counted in your analytics. Over time this inflates your traffic numbers and skews the data you’re making decisions from. The guide on how to exclude your own IP address from Shopify stats walks through how to find your IP address and filter it out so your store’s analytics reflect actual customer behavior rather than your own activity.

Performance and Cache

Adding cache in Shopify

Caching stores a version of your store’s pages so they load faster for returning visitors instead of being rebuilt from scratch on every request. For stores with a lot of products, complex pages, or high traffic, caching can make a meaningful difference to page load times and overall performance. The guide on how to add cache in Shopify covers how caching works in the context of Shopify, what options are available at the theme and app level, and how to implement it without causing stale content issues.

Deleting your cache on Shopify

When you make changes to your store and they don’t seem to be showing up, a cached version of the old page is often the reason. Clearing the cache forces Shopify to serve the latest version of your content. The guide on how to delete your cache on Shopify walks through how to clear cached data at both the browser level and the store level, and when to do it so your updates appear immediately without affecting the experience for other visitors.

Store Data and Configuration

Finding your Shopify catalog ID

Your catalog ID is a unique identifier that Shopify assigns to your product catalog. It’s used when connecting your store to external platforms, setting up B2B price lists, or working with certain API integrations that need to reference your catalog directly. The guide on how to find your Shopify catalog ID covers where this ID lives in your Shopify admin and when you’ll need it.

Setting up email forwarding

Email forwarding lets you receive messages sent to a professional address like [email protected] directly in whatever personal or business inbox you already use. It means you don’t need to set up a separate email account to maintain a professional-looking contact address. The guide on how to set up email forwarding on Shopify walks through how to configure forwarding through your domain settings so customer emails reach you without any extra accounts to manage.

Solving common import problems on Shopify

Importing products, customers, or other data into Shopify via CSV is straightforward in theory but often runs into formatting issues, missing fields, or error messages that aren’t always easy to interpret. The guide on how to solve common import problems on Shopify covers the most frequent causes of failed or incomplete imports, how to diagnose what went wrong from Shopify’s error output, and how to fix your file so the next import goes through cleanly.

Migrating from Squarespace to Shopify

Moving your store from Squarespace to Shopify means transferring your products, customer data, content, and settings to a new platform without losing what you’ve built. The process involves more than an export and import, and the order in which you do things matters. The guide on how to migrate your Squarespace website data to Shopify covers the full migration process, what transfers cleanly, what needs to be rebuilt manually, and how to set up redirects so your SEO and existing links survive the move.

FAQs

Do you need to know how to code to use Shopify?

No. Shopify is built so a store owner with no coding background can launch and run a store entirely from the admin interface. Code only becomes useful when you want to customize a theme beyond what the visual editor allows, build a private integration with another system, or develop your own app or headless storefront. For most merchants, the platform’s built-in tools cover everything they need.
What programming language does Shopify use?

Shopify themes are built in Liquid, Shopify’s own templating language, alongside standard HTML, CSS, and JavaScript. Apps are commonly built in Node.js, Ruby, Python, or PHP and talk to Shopify through its GraphQL Admin and Storefront APIs. Hydrogen storefronts use React and TypeScript. Shopify Functions are written in JavaScript or Rust and compiled to WebAssembly to run inside Shopify’s backend.
What is the Shopify CLI used for?

The Shopify CLI is a command-line tool that scaffolds, tests, and deploys themes, apps, and Hydrogen storefronts from a developer’s local machine. It handles creating a development store, pulling and pushing theme files, generating app extension boilerplate, and running a live local preview against real store data. If you build anything custom on Shopify, the CLI is usually the first tool you install.
What is the difference between the Shopify Admin API and the Storefront API?

The Admin API is the authenticated interface that apps and internal tools use to read and write merchant-side data: products, orders, customers, inventory, fulfillments. The Storefront API is the public-facing interface used by custom storefronts, mobile apps, and headless front ends to fetch product and cart information for shoppers. Both are GraphQL-first, and the Admin API also still has REST endpoints for some resources.
Can you build a custom storefront on Shopify?

Yes. Shopify supports headless commerce through Hydrogen, its React-based storefront framework, and Oxygen, the hosting layer Hydrogen runs on. With this setup, you build a fully custom front end and pull product, cart, and customer data through the Storefront API while keeping Shopify’s checkout, inventory, and order management on the backend. It is the path most large brands take when a standard theme cannot deliver the shopping experience they want.
How do I create a Shopify development store?

A development store is a free, unbranded Shopify store created from inside a Shopify Partner account. From the Partner dashboard you choose “Add store,” select “Development store,” and pick the configuration you want to test (a regular store, a Plus sandbox, or one with B2B features turned on). Development stores have no order limit for testing but cannot process real payments until they are transferred to a paying merchant.

Conclusion: Build on a Solid Technical Foundation

The technical side of Shopify spans two audiences: store owners who need to get the basics right (SSL, analytics, cache, API keys, clean imports) and developers reaching for the deeper stack (CLI, Functions, Hydrogen, the GraphQL APIs). Both groups benefit from the same thing, getting the foundations in place once so they stop being a recurring problem. Clean analytics mean better decisions. Proper SSL and security mean customer trust. A working API setup means your tools talk to each other the way they should. And a well-managed cache means your store loads fast and shows the right content every time. It’s all part of setting up a Shopify store.

None of this needs to be complicated. Work through it once, get it set up correctly, and it becomes part of the infrastructure you never have to think about again. And if you run into trouble pushing product data into the store, our guide on how to solve common Shopify CSV import errors covers every error message Shopify can throw and the exact fix for each.

Written by:

Lindsey Perry

I have 5+ years of experience with Shopify and 15+ years of experiences on other eCommerce platforms. My theme reviews are designed to help store owners find the best theme for them.