Find Image Issues That Slow Down Your Webflow Site
Speedflow checks every image on your Webflow site — file size, format, alt text, and loading attributes. Including above-the-fold detection that generic tools miss.
Every Image Issue That Affects Webflow Sites
Most images checker tools aren't built for Webflow. Speedflow checks the signals that actually matter for how Webflow generates HTML.
PNG/JPEG not converted to WebP
WebP images are 25–35% smaller than PNG or JPEG at equivalent quality. Webflow supports WebP natively — there's no reason to ship uncompressed formats.
Images too large
Images over 500KB are flagged as critical. Anything over 200KB is flagged as a warning. Large images are the single biggest cause of slow LCP scores on Webflow sites.
Above-fold images missing loading="eager"
Hero images should load immediately. Without loading="eager", browsers may defer them — directly hurting your LCP score and First Contentful Paint.
Above-fold images missing fetchpriority="high"
Without fetchpriority="high" on hero images, the browser doesn't know to prioritize them. One attribute, measurable LCP improvement.
Below-fold images with loading="eager"
Images outside the viewport shouldn't load immediately. loading="eager" on below-fold images wastes bandwidth and slows initial page load.
Images missing alt text
Alt text is required for accessibility and contributes to image SEO. Empty alt on decorative images should be intentional — not accidental.
All 8+ Image Checks
Every check Speedflow runs on your Webflow site, grouped by category.
File size & format
Loading behavior
Accessibility
Images Audit in 30 Seconds, Fixes in Minutes
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Any Webflow page – published or staging.
Get a full audit in seconds
50+ QA checks: accessibility, SEO, and performance. Prioritized by impact.
Fix with confidence
Follow Designer-specific instructions and launch knowing the site is clean.
What Webflow developers say after testing Speedflow
Real feedback from Webflow developers and agencies using Speedflow.
Finally, the tool that deserves the spotlight among Webflow developers. It's soo effective that we've instantly incorporated it into our QA process. An incredible time and nerve saver!
There's always that moment when a client opens the site on their end and starts poking around. I used to dread it. Since I started using Speedflow before every launch, I actually look forward to that moment – because I know the site is clean.
I used to spend 1-2 hours going through each site manually before launch. With Speedflow I get the same result in under a minute. That time adds up fast when you're managing multiple client projects at once.
QA used to be held together by memory and manual checklists.
Speedflow changed that – I run it at the 80-90% mark on every project, paste the URL, work through the fixes, done. Hours became minutes. One sitemap crawl covers the whole site, and fixes come with your actual data pre-filled and clear step-by-step instructions.
Whenever I flag something, Dmytro has it sorted the same day. That kind of support is rare.
If you're doing Webflow work and you're not using Speedflow, you're making QA harder than it needs to be.
QA always felt overwhelming – I knew something was probably off, but I didn't know where to start or what actually mattered. When I tried Speedflow, everything clicked.
The app doesn't just give you a score, it pinpoints the exact element causing the issue, explains why it matters, and guides you on how to fix it. That's how I finally started taking accessibility and other checks seriously, things I had never even considered before. Now auditing a site feels like a clear, manageable process instead of a frustrating guessing game.
Common Questions
How does Speedflow detect which images are above the fold?
Speedflow uses a headless browser to render your page at 1280×800 viewport and measures each image's position relative to the visible area. This is the same approach Google uses for LCP detection.
Does Speedflow optimize images automatically?
No. Speedflow identifies the issues and tells you exactly which images are affected. The fixes happen in Webflow Designer or your asset pipeline — Speedflow shows you where to look.
What's the difference between WebP and AVIF?
Both are modern formats that outperform PNG and JPEG. Speedflow flags PNG and JPEG files — switching to WebP is the practical first step since Webflow's asset manager supports it and browser compatibility is near-universal.
My images are served from a CDN — does that affect the check?
Speedflow checks the actual file size and format regardless of CDN. If the original asset is a 1MB PNG, it's flagged — even if it's cached on a CDN.
Run Your First Webflow Images Audit Free
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