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CMS checker

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CMS checker for one domain. See CMS, frameworks, servers, and other tech signals. Plus research tool with monthly credits. Starting point only.

Sign in and get Plus ($19/mo) to run live keyword research. Free browser SEO helpers stay available without Plus.
Detection is based on publicly observable signals — not a full security audit. Useful for outreach and competitive notes.

How it works

  1. 1

    Enter a domain

    Competitor or prospect site.

  2. 2

    Detected tech

    Frameworks, CMS, servers, and related signals.

  3. 3

    Export CSV

    Save the stack list for outreach notes.

Need more room?

Pro lifts daily file caps. Plus adds keyword research when you outgrow free checks.

See plans — from $9/mo

Why people use Toolsy

Fast

You get the result in a second. No waiting in a line.

Private

Browser tools stay on your device. Uploaded files are processed and discarded with the response.

No sign-up

Open the page and start. An account is only for paid plans.

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Use a CMS checker before outreach or tech notes

A CMS checker shows what software a site likely runs. You get CMS, framework, and server signals from public tech fingerprints.

Enter one domain, review the list, and copy notes for outreach or competitor research. Hard-to-detect stacks may be missing.

This is a Plus tool. Pair with WHOIS lookup for registration dates, or domain overview for traffic context.

Good for

  • Prospect tech notes
  • Competitor CMS checks
  • Outreach shortlists
  • Quick stack snapshots

Tips

  • Enter a clean root domain
  • One credit per lookup
  • Treat gaps as unknown, not none
  • Follow with WHOIS if needed

Common questions

What does a CMS checker show?

CMS, frameworks, servers, and other technologies detected from public signals on the domain you enter.

Do I need Plus for the CMS checker?

Yes. Live tech stack lookups are a Plus research feature and use credits.

How accurate is the CMS checker?

It uses publicly observable signals. Some stacks stay hidden. Treat results as a starting point, not a full audit.

How many CMS checker credits do I use?

One credit per domain. Plus includes 200 research credits per month. Identical lookups within 7 days may use cache at no extra cost.

Is the CMS checker the same as WHOIS lookup?

No. The CMS checker finds technologies. WHOIS lookup shows registration dates and registrar details.

CMS Checker Online — Toolsy