Bulk website CMS detector: which platform is each website built on?
In short: Paste a list of websites and see which platform each one shows signals of, such as WordPress, Shopify, Wix, Squarespace or Webflow, with the marker that gave it away. Limit: Markers in the first 128 KB of the home page only; no JavaScript is run.
A bulk website CMS detector reads the home page of many sites and reports the platform markers it finds. Paste up to 100 websites, or 500 after a free Google sign-in; each row names the platforms it shows signals of, such as WordPress or Shopify, and the generator tag, asset path or header behind it. Signals, not certainties. Download the CSV.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Sample result
acme.example shows WordPress signals; globex.example shows Shopify signals.
- Site
- acme.example
- Platform
- WordPress
- Marker
- /wp-content/ in page source
What this means for you
A marker is a signal that a platform is used, not proof; themes and CDNs can hide or mimic one.
- About 16 platforms recognised
- Generator tag, paths and headers read
- The matching marker shown
- Signals, never certainties
- WordPress
- Shopify
- Webflow
By SimpleVerifier Team · Last updated
Sorted your list by platform?
- Paste the sites here: 100 a run, or 500 after a free Google sign-in. Filter to the platform you sell to and download the CSV.
- Upload or paste it at /verify. Every address gets a live mailbox check, and the first 100 email checks are free with a Google sign-in, no card.
How do I find out which platform many websites use?
- Paste up to 100 sites, or 500 after a free Google sign-in, one per line; email addresses and URLs work too, and the domain is taken from each. You can also upload a CSV.
- Press Detect website platforms. Each home page is requested once, over HTTPS and then HTTP if HTTPS doesn't answer, five sites at a time. Only the first 128 KB is read.
- Read each row: Platform signal found, with the name and the exact marker (a generator meta tag, an asset path such as /wp-content/, or a response header), or No platform signal.
- Filter to one platform, such as Shopify stores, and download the CSV.
Example
- You enter
- Three sites:
acme.example(a WordPress theme),globex.example(a Shopify store) andinitech.example(a custom build). - You get
- acme.example: Platform signal found, WordPress, from the /wp-content/ path and a generator tag. globex.example: Shopify, from cdn.shopify.com. initech.example: No platform signal. Download the CSV.
- Limits
- Up to 100 a run without an account and 500 when signed in with Google, counted over a minute. 10 sites a request; one GET of the home page from our server, no cookies, nothing stored.
How does a tool tell which platform a website uses?
Most platforms leave marks in the page a visitor receives. WordPress sites usually load files from /wp-content/ and often carry a generator meta tag; Shopify stores load assets from cdn.shopify.com; Wix, Squarespace, Webflow and Framer each serve files from their own asset hosts. This tool looks for those markers in the first 128 KB of the home page, and for a few response headers such as x-shopid.
It reports what it saw, with the marker, so you can judge it. If a site has only a generator tag the tool doesn't recognise, the tag's text is shown as it is.
Why a signal, not a certainty?
A marker can be left over from an old theme, copied into a custom build, or hidden by a developer who removed the generator tag. A headless shop can use Shopify for its back end while the page shows none of its files. A row with no signal means no known marker was in the page we fetched, not that no platform exists.
A page that builds its content in the browser can look empty to a tool that doesn't run JavaScript. For who hosts a site, use the website host checker; hosting and platform are different questions.
What can you do with a list of platforms?
Agencies, app makers and freelancers use the platform to decide who to approach: a Shopify app for stores, a theme shop for WordPress sites, a migration offer for sites on a builder. The platform says what the site is built with, not who runs it or how to reach them.
When you find the addresses, check that they exist before you send. Verify the list so a stale address doesn't cost you your sender reputation. Find the addresses on a site first if you only have the domain.
Who uses this tool, and for what?
- Agencies and freelancers
- Find sites on a platform you build for before you pitch a redesign or a migration.
- App and plugin makers
- Pick out the Shopify or WordPress sites in a prospect list.
- Sales teams
- Add a platform column to an account list before outreach.
- Researchers
- Count which platforms a set of competitors or customers run.
What can’t this tool tell you?
- Markers in the first 128 KB of the home page only; no JavaScript is run.
- A signal is not proof; themes, CDNs and headless builds can hide or mimic a platform.
- A missing signal is not proof that a site has no platform.
- Up to 100 sites a run without an account, 500 signed in.
Common questions
- How do I check what CMS a website uses?
- Paste the site into a bulk website CMS detector like this one. It reads the home page's generator tag, asset paths and headers, and names the platforms it shows signals of.
- Is this website CMS detector free?
- Yes. 100 sites a run without an account, 500 after a free Google sign-in, with no card, and a CSV download.
- Which platforms does it recognise?
- WordPress, WooCommerce, Shopify, Wix, Squarespace, Webflow, Framer, Drupal, Joomla, Ghost, HubSpot CMS, Magento, BigCommerce, GoDaddy Website Builder, Weebly and Elementor, plus any other generator tag it reads.
- Why does a site show no platform?
- No known marker was in the first 128 KB of its home page. A custom build, a headless site or a page rendered by JavaScript shows none.
- Can it be wrong?
- Yes. A marker can be left behind by an old theme or hidden on purpose. Read each result as a signal and the evidence as the reason.
- Does it store or log in to the sites?
- No. It sends one request per page with no cookies, reads the HTML and keeps nothing.
Sources
A tidy list can still be full of dead addresses.
Extracting, deduplicating and syntax checks all work on the text of an address. None of them can tell whether the mailbox exists. Only the server that hosts it can answer that, through an SMTP check, and that is what the paid product does.
- Upload the cleaned file as it is: CSVs up to 100,000 rows
- A real SMTP mailbox check on every row, with catch-all detection
- Small list? Starter at $9/mo covers 2,500 emails a month, cancel anytime
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.