The BugViso Blog
Practical guides on website audits, Core Web Vitals, technical SEO, and getting your site cited by AI answer engines.
What automated accessibility testing with axe-core catches, what it flags for review, and what it can never see. Data from 219 sites plus a manual checklist.
Discover the best broken link checker tool large site in 2026. Compare concurrent async HTTPX link probers, 404 cascade detection, and redirect graph checks.
Master canonical tags to prevent duplicate content penalties. Learn self-referencing rules, cross-domain canonicals, and how to fix subpage-to-home errors.
Discover the most common WCAG violations and how to fix each with verified code. Remediate low contrast, missing alt text, form labels, and focus rings.
Do accessibility overlays work? We ran axe-core on 62 sites with the overlay on and blocked: on 90%, it changed nothing. Data, method and what to do instead.
How a duplicate content checker finds exact and near-duplicate pages with SimHash, what it misses, and data from 1,332 pages on 57 sites. Free Python script.
Learn how to achieve ADA website compliance and mitigate legal risk. Test your site against WCAG 2.1 AA benchmarks using automated and manual audit workflows.
How to fix broken internal links: find every 404 and redirecting href, update the source link instead of stacking redirects, and verify. Data from 219 sites.
Fix color contrast accessibility errors: WCAG AA needs 4.5:1 for text and 3:1 for large text. Failure data from 219 sites and a script for passing colors.
Learn how to find and remove unused JavaScript and CSS. Eliminate dead code, optimize tree-shaking, and reduce web bundle sizes with CDP coverage analysis.
Learn how to update old blog posts for SEO. Master content decay audits, GSC query refreshes, semantic updates, schema upgrades, and post-refresh technical QA.
How to write alt text for screen readers and image search: 15 before/after examples, when to leave alt empty, and data from 14,321 images on 219 sites.
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