Shopify Theme Detector: Identify Any Store's Theme, Version & Listing

Here is what a real theme detection returns.

A frozen result from kith.com. Every fact comes with the exact piece of evidence pulled from the public storefront, so you can verify it yourself.

kith.com

Custom theme · forked from Be Yours

Base theme: Be Yours

cdn.shopify.com/s/files/…/be-yours-v18-3-2/assets/

Theme name
Version: 18.3.2

asset filename pattern: theme.v18-3-2.min.css

Version
Theme Store listing match

themes.shopify.com/themes/be-yours · $300 USD

Listing
Author: Roar Themes

theme.author meta · roartheme.co

Author
Theme ID detected

window.theme.id = 142362197043

ID
Customization level: heavy

~62% of base templates modified or replaced

Custom

Run your own detection above to see the same evidence for any storefront.

What the Theme Detector reads.

The detection pulls signals from multiple places in the storefront source, so a single rename or asset rewrite does not defeat it:

Theme name and ID from the window.theme JavaScript global that Shopify injects into every storefront.
Theme directory path from CDN asset URLs, the most reliable signal of the original theme.
Theme Store listing match against the public registry of Shopify Themes, with price and category.
Theme version from the asset filename pattern Shopify generates on every theme upload.
Theme author and publisher from theme metadata embedded in theme.liquid.
Customization level by comparing the live storefront templates to the base theme's known template signatures.
Theme app embeds attached to the theme (handled in detail by the App Detector).
Heuristic last-modified date from CDN cache hints and asset versioning.

How the Shopify Theme Detector works.

01

Fetch the public storefront.

A single GET request returns the homepage HTML, the same response any browser would receive. No admin access, no Storefront API token.

02

Read every theme signal.

The HTML is scanned for the theme global, the CDN asset paths, the theme directory name, the asset filename version pattern, and theme.liquid metadata.

03

Match against the registry.

Recovered names and directory paths are matched against the public Shopify Theme Store registry to surface the listing, the author, and the price.

When to use the Theme Detector.

Theme research before purchase.

Spot a storefront you love. Detect the theme. Buy the same one. Save the cost of hiring a designer to reverse-engineer something Shopify already sells for $300.

Competitor stack research.

The theme tells you how a competitor approached their build: out-of-the-box theme, paid theme, custom fork, or fully bespoke. Each tier reveals a different budget and team.

Theme builders tracking adoption.

If you sell themes on the Shopify Theme Store, the Theme Detector is how you check how widely your theme is deployed in the wild, and on which kinds of stores.

Plagiarism and copy-of detection.

Suspect a competitor cloned your storefront? Detect the theme on both. A matching base theme plus matching customizations is a strong signal worth investigating.

What the Theme Detector cannot see.

Theme detection is reliable on classic Shopify themes. A few cases stay invisible.

Headless storefronts. Hydrogen, Next.js, Remix, and Astro storefronts call the Storefront API directly. There is no Liquid theme to fingerprint.
Fully bespoke themes. A theme built from scratch with no base inheritance has no listing to match, only a generic custom theme name.
Heavily renamed assets. A merchant who renames every CDN file path can hide the theme directory name, though the asset structure still hints at a base.
Pre-release theme versions. A theme version that has not yet shipped to the Theme Store will not match a public registry entry.
Password-protected stores. The protected page is a Shopify login screen, not the storefront, so there is no theme HTML to read.

Frequently asked questions.

Is the Shopify Theme Detector free?

Yes. Every detection is free with no daily limit, no signup, and no API key. The tool reads only the public HTML the browser already sees.

Why does the detection say “custom”?

Custom means the store has modified the theme enough that the base theme name was renamed in the source. The detector still reports the original theme it was forked from when that information is recoverable from the CDN path or asset filenames.

Can a Shopify store hide its theme?

A merchant can rename the theme in Shopify admin, but the theme directory name in the CDN path and the original asset filenames usually survive. A truly hidden theme would require a full asset rewrite, which is rare.

How accurate is the theme version number?

Theme versions are read directly from the asset filename pattern that Shopify generates on theme upload. If the merchant uploaded the official version, the number is exact. Custom forks can drift from this.

What is the difference between a theme and a theme app embed?

The theme is the storefront's HTML, CSS, and Liquid templates. A theme app embed is a piece of code injected by an installed app (review widgets, popups, chat). Theme Detector reports the theme. App Detector reports the embeds.

Can I detect a headless Shopify storefront's theme?

No. Headless storefronts (Hydrogen, Next.js, Remix) do not use a Liquid theme. They render through a custom frontend that calls the Storefront API. There is no theme to detect in that case.

Five more free Shopify tools, same evidence-first approach.