Scan report for yandexdataschool.ru
5 pages crawled — 1198 words, 20 images and 186 links read straight off the pages and checked for accessibility, performance, SEO, security, forms, links and infrastructure. 34 distinct problems found, counted 89 times across the pages.
Report updated 2026-10-29
Category scores
- Overall
- 90/100
- SEO
- 57/100 · Issues: 38
- Accessibility
- 83/100 · Issues: 17
- Performance
- 93/100 · Issues: 7
- Security
- 69/100 · Issues: 15
- Privacy
- 88/100 · Issues: 2
- HTML validity
- 100/100 · No issues found
- Forms
- 100/100 · No issues found
- Links
- 100/100 · No issues found
- Console
- 100/100 · No issues found
- Infrastructure
- 100/100 · No issues found
- Mobile
- 97/100 · Issues: 5
- Images
- 91/100 · Issues: 5
Quick Wins
High-impact, low-effort fixes, ranked by what this scan actually found.
- Add alt text to the images that are missing it — Search engines can index the images and screen-reader users learn what they show.
- Send a Strict-Transport-Security header — Browsers refuse to fall back to plain HTTP for this domain.
- Load the first image eagerly — The largest image starts downloading with the page instead of after it.
- Add an H1 heading — Both readers and crawlers get a clear statement of what the page is about.
- Wrap the content in a <main> element — Screen-reader users jump straight to the content.
- Send a Permissions-Policy header — Camera, microphone and geolocation stay switched off for embedded content.
What the site checks found
- Low — SEO — Sitemap URLs pointing at a different domain: 3 — they will be ignored.
- Low — SEO — No entry in the sitemap carries a lastmod date, so crawlers cannot tell which pages have changed since they last read them.
- Low — SEO — Pages the crawl found that the sitemap does not list: 5 of 5 — crawlers have to reach them through links alone.
- Medium — SEO — The sitemap lists 5 service addresses (cart, account, search, thank-you pages, sort and filter parameters): /support/search, /support/search/search-results/settings.html, /support/search/query-language/qlanguage.html, /support/search/search-suggestions/suggestions.html.
- Low — Performance — The HTML is sent with no Cache-Control, Expires, ETag or Last-Modified — every visit re-downloads it in full.
- Low — Security — The Content-Security-Policy allows 'unsafe-inline' or 'unsafe-eval', which is what a script injection needs.
- Medium — Security — No DMARC record at _dmarc — nothing tells receiving servers what to do with mail that fails the SPF check.
- Low — Security — No CAA record — any certificate authority may issue a certificate for this domain.
- Low — Security — The zone is not signed with DNSSEC, so a forged DNS answer cannot be detected.
- Low — Privacy — The site loads Yandex Metrica with no consent layer anywhere in the markup — under the GDPR and the ePrivacy Directive those tags need consent before they run.
- Medium — Privacy — None of the scanned pages links a privacy policy (missing: privacy, terms, imprint).
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