About this tool
Review image-loading exports before launch so critical images are not deferred, non-critical assets are not over-prioritized, and Core Web Vitals risk stays controlled.
This SEO tool is built for pre-publish QA and implementation support rather than vague optimization advice. It helps teams check one search-facing signal cleanly before a page, template, or release goes live.
- Parses rows in URL|image|loading|fetchpriority|context|size format and normalizes page URLs with an optional base URL.
- Flags lazy-loaded critical images, eager below-fold images, high-priority misuse, and directive conflicts.
- Supports configurable below-fold eager payload budgets and per-page high-priority limits for practical remediation triage.
How to use Lazy Loading Checker
Enter the relevant metadata, markup, URL set, or export data into the tool above, then review the checks and corrected output. Use the result to fix the source template, CMS field, or deployment rule before shipping changes.
When this tool is useful
- Audit loading and fetchpriority directives before launching templates, migrations, or performance-focused releases.
- Catch lazy-loaded hero/LCP images that can delay rendering and hurt Core Web Vitals.
- Prioritize non-critical images still marked eager or high-priority when they should defer.
Practical tips
- Keep above-fold and LCP images eager with clear high fetch priority, then lazy-load non-critical media by default.
- Set a byte budget for eager below-fold assets so accidental template regressions are easier to catch.
- Limit per-page high-priority images to only the truly critical visual assets to avoid resource contention.
Why people use this tool
Technical SEO work is usually about preventing avoidable mistakes before crawlers and users see them. Tools like this are most valuable when they make those checks concrete and fast.
Related search intents
image lazy loading checker, loading lazy audit, above the fold image loading checker, native lazy load seo tool.