Swift·Cap

Free tools

Check your domain in seconds

Real technical checks, free and without sign-up. You enter a domain, we read what is already public and hand you a readable report with the exact fix for each finding.

  • Available

    Web security check

    Reads your site's HTTPS response headers and assesses the protections the browser applies to your visitors.

    • HTTPS, HSTS and redirection
    • CSP, clickjacking, MIME type
    • Cookie attributes
  • Available

    DNS and email deliverability

    Reads your public DNS records and checks whether your domain can be spoofed in a phishing campaign.

    • SPF, DMARC, DKIM
    • MX servers and NS redundancy
    • Fixes ready to publish
  • Soon

    Performance audit

    Measurement of real load time and Core Web Vitals metrics, with blocking points ranked by impact.

    • Core Web Vitals
    • Payload and render blocking
    • Fix prioritisation

    In development.

What these tools do — and do not do

They observe only what your server and your DNS zone already publish to everyone: one HTTPS request to your home page, a few DNS lookups. Nothing is sent to your users, no account is tested, no port is scanned, no vulnerability is exploited. They are therefore surface indicators: they spot missing or dangerous configuration, but they replace neither an application audit, nor a penetration test, nor a code review. A good score does not mean your system is secure — it means these particular checks pass, at this moment.

Acceptable use

  • Passive, read-only checks, one request per run.
  • Test only domains you own or are explicitly authorised to test.
  • Certain sensitive domains (government, banking) are refused automatically and require written authorisation.
  • Reports are generated on demand and are not published.

Coming soon

A one-off check shows the moment. Monitoring shows the drift.

A configuration that is correct today can be broken tomorrow by a release, a change of supplier or an expired certificate. We are preparing a subscription for continuous checking: repeated runs, history, email alerts and exportable reports. It is not open yet.

Be told when it opens