Lazy Loading Checker: Find Images Slowing Your Site Down
Scan any page to see which images and iframes load lazily, which do not, and get clear fixes to speed up your site. Results in seconds.
Free with a Brainito account. No credit card required.
Spot Missing Lazy Loading
See every image and iframe on the page that loads eagerly when it could wait, wasting bandwidth on first load.
Protect Your Core Web Vitals
Lazy loading images near the top of the page can hurt LCP. We flag ones that should load right away.
Get Clear Fix Recommendations
Each finding comes with a plain-language recommendation, including the exact loading attribute to add or remove.
Frequently Asked Questions
What does the Lazy Loading Checker actually check?
It fetches your URL and scans every image and iframe for the loading attribute. You get a list of elements that load lazily, elements that load eagerly, and recommendations on which ones to change for faster page loads.
Does lazy loading really affect SEO?
Yes, indirectly. Lazy loading cuts initial page weight, which improves load speed and Core Web Vitals. Google uses page experience signals in ranking, so faster pages tend to perform better in search and keep visitors around longer.
Is the Lazy Loading Checker free to use?
Yes. Create a free Brainito account and you can run the Lazy Loading Checker on any URL, along with the rest of our SEO tools. There is no credit card required, and each scan finishes in seconds.
Run your first lazy loading scan and get fixes in seconds.
One account unlocks lazy loading checker plus 340+ marketing tools, weekly audits, and your action plan.