The independent quality score for websites.
Check websites quickly and thoroughly against 74 checkpoints. Free and without sign-up. You see the full result right away. Promise!
A check with no strings attached
Most website checks are lead forms: you see part of the result and get the rest in exchange for your email address. checkmaster.net shows everything and wants nothing from you.
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The full report, right away
Score, all results and the most important actions right in your browser. We never ask for your email address, not even at the end.
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Independently rated
We do not sell websites, SEO or consulting. The score follows fixed rules, and every check is explained in the knowledge base.
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Quality you can show
Share the report via link with your team, your agency or your customers. Everyone sees the same result, for 30 days.
What we check
Eight areas in one report.
AI readability
AI assistants can read the website and match it with the right organisation.
- Structured company data
- Company details in Schema.org
- Marked-up content
- Linked profiles
- Valid structured data
- Access for AI services
- Preparation for AI assistants
- Content pages
- Semantic HTML structure
- Text share
- Content readable without JavaScript
Search engine friendliness
Be found when someone searches on Google.
- Page title
- Description for Google
- Main heading
- Structure of headings
- Main heading fits the content
- Readable and findable by Google
- Canonical tag
- Redirect with and without www
- Language details
- Language versions (hreflang)
- Sitemap
- Broken links
- Readable addresses (URLs)
- Breadcrumb navigation
- Error page (404)
- Preview on social media
Security
Protection against attacks and forged emails in the company's name.
- Encrypted connection (HTTPS)
- Security certificate
- Unencrypted content on HTTPS pages
- Protective settings of the server
- Protection of cookies
- Outdated software
- JavaScript libraries with known vulnerabilities
- WordPress plugins with known vulnerabilities
- Protection against email fraud
- Permitted certificate authorities (CAA)
- Contact for security issues (security.txt)
- Signed DNS records (DNSSEC)
Performance
Fast pages lose fewer visitors before they get in touch.
- TTFB (Time to First Byte)
- Loading time and Core Web Vitals
- Images
- Data volume of the home page
- HTML document
- Text compression
- Transfer protocol
- Blocking files
- Browser cache
Mobile
Most visitors come from a smartphone.
- Viewport and zoom
- Appearance on a smartphone
- Images in a suitable size
- Table layout
- Tappable phone number
Privacy
Less risk of privacy complaints.
- Privacy policy and imprint
- Date of the privacy policy
- Third parties before consent
- Cookie notice
- Effect of the cookie choice
- Server location
Accessibility
More reach, including among older people.
- Accessibility (automatic preliminary check)
- Operation with the keyboard
- Media that starts by itself
- Accessible PDF documents
- Accessibility statement
Markup
Error-free HTML is read reliably by browsers, Google and AI.
- HTML5 doctype
- W3C validation
- Outdated HTML elements
- Duplicate IDs
- JavaScript errors
- Missing files
- Inline styles
- Size of the HTML
- Character encoding
- Technology in use
Questions
What is the catch?
There is none. You see the full report without an email address and without an account. We do not sell anything, and nobody contacts you after the check.
How is the score calculated?
Every check deducts points by fixed rules, depending on how serious a finding is. This gives a score per area and an overall score from 0 to 100. What each check measures and why is explained in the knowledge base.
Can I share the report?
Yes, via the link you receive after the check. The full report can be opened with this link for 30 days, without an account and without appearing in search engines. After that the link no longer works.
Does the check ask ChatGPT about me?
No. It checks whether AI assistants can read the website and match it with the right organisation. We do not measure whether they actually recommend it.
Do you attack my website?
No. We open the website like a normal visitor and read public records such as DNS. No port scans, no login attempts.
How long does the check take?
Usually 2 to 5 minutes. We measure loading time and appearance in a real browser, which takes a little time.
What happens to my data?
The report is available for 30 days. We keep the address and the result afterwards for evaluations. We set no cookies for advertising or analytics and pass nothing on to AI providers. Details in the privacy policy.
Is this legal advice?
No. Notes on privacy and accessibility come from an automatic check and do not replace professional advice.