imgix transforms and delivers perfectly optimized images via URL parameters — WebP conversion, smart cropping, responsive srcset, 100+ transformations — but as an image CDN it has no WCAG accessibility audit of the pages that use imgix, no Core Web Vitals scoring, and no post-deployment front-end quality monitoring. PageGuard audits any website using imgix externally — free, no imgix account access needed, results in 30 seconds.
ADA Title II Deadline: April 24, 2026
Government agencies, nonprofits, and educational institutions using imgix to serve optimized images on public-facing pages face ADA Title II compliance requirements. imgix's automatic WebP conversion and smart cropping improve image delivery performance — but cannot enforce that the HTML surrounding imgix image URLs implements correct alt text (WCAG 1.1.1), width/height to prevent CLS, or aria-hidden on decorative images. A missing alt text on an imgix-served image is served immediately to all users at full CDN speed without any imgix alert. PageGuard checks all imgix-referenced images for WCAG compliance without requiring your imgix source credentials.
| Feature | PageGuard | imgix |
|---|---|---|
| What is it? | External website health monitor — scans any deployed URL for performance, accessibility, SEO, and best practices | imgix is a real-time image processing and optimization CDN founded in 2012 and headquartered in San Francisco, California; imgix specializes in on-the-fly image transformation via URL parameters — cropping, resizing, format conversion (WebP/AVIF), quality optimization, smart cropping using face/focal point detection, watermarking, text overlay, color adjustment, and 100+ image transformation operations; imgix serves images through its global CDN network built on top of Fastly and Amazon CloudFront; imgix is used by Buzzfeed, Unsplash, Squarespace, Shopify, and thousands of media-heavy websites to dramatically reduce image payload sizes and serve correctly-sized images to any device; imgix also offers imgix Content (formerly Canopy) for digital asset management; imgix is exclusively an image processing and delivery platform and does not perform WCAG accessibility auditing, SEO quality analysis, or Core Web Vitals measurement of the web pages that use imgix for image delivery |
| Free tier | ✓ Yes — unlimited one-off scans, no signup required | No free tier for production use — imgix pricing starts at $0.08/GB for bandwidth on the Starter plan ($35/month minimum) and goes up to $0.05/GB on Growth ($150/month minimum) and custom Enterprise pricing; imgix offers a free trial with a $35 credit; imgix has no WCAG accessibility auditing, no Core Web Vitals measurement, no technical SEO audit of websites using imgix for image delivery, and no ADA compliance monitoring at any price tier |
| Accessibility audit (WCAG / ADA) | ✓ Yes — WCAG 2.1 AA scored 0–100 with specific issue list | No — imgix is an image processing and CDN platform; imgix has no built-in WCAG compliance checking, accessibility scoring, or ADA compliance monitoring for web pages that use imgix-delivered images; imgix can resize, compress, and convert images to WebP or AVIF format via URL parameters (e.g. ?w=800&auto=format&fit=crop), but cannot verify whether the surrounding HTML correctly implements alt text (WCAG 1.1.1), whether images used decoratively are marked as aria-hidden, or whether image dimensions prevent Cumulative Layout Shift; imgix's Client Hints and automatic DPR optimization serve the right image to the right device, but accessibility compliance of the HTML surrounding imgix image URLs is entirely the developer's responsibility |
| Technical SEO audit | ✓ Yes — meta tags, headings, canonical, structured data | No — imgix provides no SEO audit of websites that use imgix for image delivery; imgix analytics show bandwidth consumption, cache hit ratios, transformation request volume, and image origin performance — not the SEO quality of the HTML pages that contain imgix image URLs; serving correctly-sized, WebP-format images through imgix can contribute to improved SEO scores by reducing image payload, but the overall technical SEO quality of the page (meta tags, heading hierarchy, canonical URLs, structured data) is not analyzed by imgix |
| Performance audit (Core Web Vitals) | ✓ Yes — LCP, CLS, FCP scored 0–100 per scan | imgix's auto=format&fit=crop URL parameters can significantly reduce image payload sizes, contributing to better LCP and FCP scores; imgix's aspect-ratio-preserving transformations and responsive srcset generation via the imgix client libraries can help prevent CLS from layout-shifting images; however, imgix does not directly measure browser-side Core Web Vitals (LCP, CLS, FCP, INP) for pages using imgix; measuring actual Core Web Vitals impact of imgix optimization on a deployed production website requires external performance testing tools; missing width and height attributes on imgix URL-based images still cause CLS regardless of imgix's image optimization capabilities |
| Real-time image processing CDN | No — PageGuard is an external monitoring tool, not an image CDN or processing service | ✓ Yes — imgix's core value proposition: 100+ image transformation operations via URL parameters with global CDN delivery; imgix transformations via URL: resize (w=, h=), crop modes (fit=crop, fit=clamp, fit=fill), format conversion (auto=format for WebP/AVIF, fm=webp, fm=avif), quality (q=75), DPR/HiDPI (dpr=2), face detection crop (fit=facearea), focal point crop (?fp-x=0.4&fp-y=0.3), background removal (bg-remove=true on Enterprise), smart crop with entropy and edge modes, watermarking, text overlay, color saturation/exposure/vibrance adjustments, blur, sharpen, and monochrome; imgix generates responsive srcset URLs for any transformation; imgix Client Hints support for automatic DPR and width negotiation; imgix's built-in CDN (Fastly + CloudFront backed) serves transformed images with high cache hit rates globally |
| Automated website monitoring | ✓ Yes — weekly or daily scans with email alerts on score drop | No — imgix does not perform automated front-end quality monitoring of WCAG compliance, Core Web Vitals, or SEO quality for websites using imgix for image delivery; imgix analytics show image transformation performance, cache metrics, and bandwidth but do not monitor HTML accessibility regressions, Core Web Vitals degradation, or SEO issues on pages that contain imgix image URLs; automated front-end quality monitoring of websites using imgix requires a separate external monitoring tool |
| AI-generated plain-English report | ✓ Yes — explains issues in non-technical language | No — imgix provides no AI-generated health report or plain-English explanation of front-end accessibility, SEO, or Core Web Vitals issues for websites using imgix; the imgix dashboard shows image transformation analytics, source configuration, billing, and CDN performance data — not front-end quality analysis of the HTML pages that reference imgix image URLs |
| ADA Title II compliance monitoring | ✓ Yes — WCAG audit + alert on accessibility regression | No — imgix does not audit or alert on WCAG compliance for pages using imgix-delivered images; government agencies, nonprofits, and educational institutions that use imgix to serve optimized images on public-facing pages face ADA Title II compliance requirements with an April 24, 2026 deadline; imgix's automatic format conversion (WebP/AVIF) and smart cropping improve image delivery performance, but cannot enforce that the HTML surrounding imgix image URLs implements correct alt text, aria-label, role=img, or other WCAG 2.1 AA image requirements; an accessibility regression — missing alt text on an imgix-served image — is served immediately to all users at full CDN speed without any imgix alert or detection |
| Works on any deployed platform | ✓ Yes — scans any URL on any hosting or platform | imgix delivers transformed images for websites hosted on any platform (WordPress, Shopify, Next.js, custom servers) through imgix source configuration pointing to S3, web folder, WebDAV, or Azure Blob origins; imgix does not scan or monitor the front-end quality of web pages that use imgix image URLs; imgix is exclusively an image processing and CDN service with no web page health monitoring capabilities |
| Independent external audit | ✓ Yes — third-party scan, shareable URL for clients/stakeholders | No — imgix provides no built-in tool to generate a shareable external front-end health report for websites using imgix; the imgix dashboard provides image analytics, source configuration, transformation usage, and billing — not WCAG accessibility scores or Core Web Vitals quality scores shareable with clients, procurement teams, or ADA compliance auditors |
| Instant on-demand scan | ✓ Yes — results in 30 seconds, no code changes needed | No — no on-demand front-end health scan of websites using imgix; auditing a website that uses imgix for image delivery for WCAG accessibility, Core Web Vitals, or SEO quality requires running third-party tools against the public URL; imgix has no concept of scanning the HTML accessibility or SEO quality of web pages that contain imgix transformation URL references |
| Multi-site dashboard | ✓ Yes — 1–50 sites depending on plan | imgix's dashboard manages multiple image sources (S3 buckets, web folders, Azure Blob origins) across an account; there is no cross-website front-end health dashboard showing WCAG compliance, SEO quality, or Core Web Vitals for multiple websites that use imgix as their image delivery layer |
| Pricing for health monitoring | ✓ Free + from $9/mo for automated monitoring | Front-end health monitoring not available — imgix Starter: $35/month minimum, $0.08/GB bandwidth, 1,000 origins included; Growth: $150/month minimum, $0.05/GB; Enterprise: custom pricing; no WCAG or Core Web Vitals monitoring at any tier |
Get WCAG accessibility scores and Core Web Vitals for any website serving images through imgix. Checks alt text on imgix-URL images, CLS from missing width/height, heading hierarchy, and overall page health. Results in 30 seconds. No imgix account, source credentials, or API token required.
Results in ~30 seconds. 4 scores: Performance, Accessibility, SEO, Best Practices.
Yes — PageGuard scans any public URL regardless of whether images are served from imgix, Cloudinary, Akamai, or any other image CDN. Paste your website URL into PageGuard for a full health report covering WCAG accessibility, Core Web Vitals, SEO, and best practices in ~30 seconds. PageGuard checks images referenced via imgix URL parameters for missing alt text, detects CLS from missing width/height attributes, and audits overall page accessibility compliance. No imgix account, source configuration credentials, or API token required.
No — imgix is a real-time image processing and optimization CDN. It has no built-in WCAG compliance checking, accessibility scoring, or ADA compliance monitoring for web pages that use imgix-delivered images. imgix can convert images to WebP or AVIF, perform smart face-detect cropping, and generate responsive srcset values, but cannot verify whether the surrounding HTML implements correct alt text, aria-hidden on decorative images, or explicit width/height attributes to prevent CLS. Detecting missing alt text and WCAG violations on pages using imgix requires an external audit tool like PageGuard.
Yes — using imgix for optimized image delivery does not automatically make a website WCAG 2.1 AA compliant. Images served via imgix URL transformations still need correct alt text in the HTML img element (WCAG 1.1.1). Missing width and height attributes on imgix images — even perfectly WebP-optimized images with face-detect cropping — cause Cumulative Layout Shift (CLS), a Core Web Vitals failure. imgix's smart cropping and responsive srcset cannot compensate for missing HTML accessibility attributes. PageGuard detects these issues by auditing the live rendered HTML, including the alt text and dimension attributes of all imgix-referenced images.
No — they serve completely different purposes. imgix is a real-time image processing and optimization CDN with 100+ URL parameter transformations, WebP/AVIF conversion, face-detect smart cropping, focal-point cropping, responsive srcset generation, watermarking, text overlay, background removal, and global CDN delivery via Fastly and CloudFront — helping websites reduce image payload and serve correctly-sized images. PageGuard is an external quality monitoring tool that audits deployed web pages for WCAG compliance, Core Web Vitals, and SEO quality. Organizations using imgix for superior image delivery should also use PageGuard to verify that HTML pages correctly implement alt text and image dimensions that imgix cannot enforce on surrounding markup.