Netlify Edge Functions run Deno-based JavaScript globally at CDN nodes for ultra-low-latency personalization and response transformation — but as an edge compute layer they have no WCAG accessibility audit, no Core Web Vitals scoring, and no post-deployment front-end quality monitoring. PageGuard audits the final HTML delivered to users by Netlify Edge Functions — free, no account access needed, results in 30 seconds.
ADA Title II Deadline: April 24, 2026
State and local government websites must meet WCAG 2.1 AA by April 24, 2026. Government agencies, nonprofits, and educational institutions using Netlify with Edge Functions face this compliance deadline. Edge Functions can transform response HTML — injecting scripts, modifying attributes, personalizing content — in ways that may inadvertently break accessibility after pre-deployment testing. PageGuard scans the final edge-delivered HTML and alerts you when WCAG scores drop after Edge Function deployments.
| Feature | PageGuard | Netlify Edge Functions |
|---|---|---|
| What is it? | External website health monitor — scans any deployed URL for performance, accessibility, SEO, and best practices | Netlify Edge Functions is a globally distributed compute platform built on Deno that runs JavaScript and TypeScript at the network edge — in Netlify's CDN nodes closest to each visitor; launched in 2022 as Netlify's response to Cloudflare Workers and Vercel Edge Functions; Edge Functions intercept and modify HTTP requests and responses before they reach the origin, enabling geolocation-based personalization, A/B testing, authentication checks, URL rewrites, and response header manipulation at ultra-low latency; each Edge Function runs in a Deno-based isolate with a restricted API surface for security; Edge Functions complement Netlify's serverless functions (which run on AWS Lambda) by executing at the CDN layer with sub-millisecond cold starts; built into the Netlify platform alongside builds, deploys, forms, analytics, and identity; supports Web APIs (fetch, Request, Response, URL, crypto); available on all Netlify plans |
| Free tier | Yes — unlimited one-off scans, no signup required | Yes — Netlify Edge Functions are available on all Netlify plans including the free tier; free tier includes 125,000 edge function invocations per month and 100 GB bandwidth; no built-in accessibility or SEO auditing of pages served through edge functions at any tier |
| Accessibility audit (WCAG / ADA) | ✓ Yes — WCAG 2.1 AA scored 0–100 with specific issue list | No — Netlify Edge Functions is a compute layer for executing JavaScript at the CDN edge; it has no built-in WCAG or ADA accessibility auditing for the HTML content it serves or modifies; Edge Functions can transform responses — injecting scripts, modifying headers, adding personalization — but they provide no mechanism to analyze the WCAG compliance, color contrast, ARIA structure, or keyboard navigation of the HTML output they deliver to users; accessibility quality of pages served through Netlify Edge Functions depends entirely on the underlying application content and components |
| Technical SEO audit | ✓ Yes — meta tags, headings, canonical, structured data | No — Netlify Edge Functions provides no SEO audit scores, meta tag validation, heading hierarchy analysis, canonical URL checking, or structured data verification; Edge Functions can rewrite URLs, inject canonical tags, and redirect bots — these are useful SEO operations — but Netlify does not audit or score the SEO quality of the pages being served; developers must use separate SEO tools to verify the quality of pages served through Netlify Edge Functions |
| Performance audit (Core Web Vitals) | ✓ Yes — LCP, CLS, FCP scored 0–100 per scan | No — Netlify Edge Functions provides no Core Web Vitals measurement (LCP, CLS, FCP, INP, TTFB) for pages served through its edge network; Netlify Analytics shows request volume, bandwidth, and top pages but does not report browser-side Core Web Vitals; Edge Functions run at sub-millisecond latency which can improve TTFB, but Netlify does not measure or report the resulting Core Web Vitals impact on live user experience; measuring production Core Web Vitals requires separate tooling like PageGuard |
| Edge compute & CDN delivery | No — PageGuard is an external monitoring tool, not an edge compute or CDN platform | ✓ Yes — Netlify Edge Functions core capability: execute JavaScript/TypeScript at Netlify CDN nodes globally with sub-millisecond cold starts; intercept HTTP requests before they reach the origin for geolocation, personalization, authentication, and A/B testing; use context.geo to detect visitor country, city, and coordinates; set cookies, rewrite URLs, modify response headers, and stream HTML modifications at the network edge; works alongside Netlify's serverless functions (AWS Lambda) for full-stack flexibility; deploy edge functions by exporting a handler from files in the netlify/edge-functions/ directory; supports Deno APIs, Web Crypto, and standard Web APIs; automatic deploys on git push; deploy previews per branch |
| Automated website monitoring | ✓ Yes — weekly or daily scans with email alerts on score drop | No — Netlify Edge Functions does not perform automated quality monitoring of WCAG compliance, Core Web Vitals, or SEO quality for pages it serves; Netlify deploys and runs edge functions automatically on every git push, but has no concept of post-deployment quality scanning, score tracking, or regression alerting for the HTML content delivered through those edge functions; automated accessibility monitoring of the live production URL requires a separate external monitoring tool |
| AI-generated plain-English report | ✓ Yes — explains issues in non-technical language | No — Netlify Edge Functions provides no AI-generated health report or plain-English explanation of front-end accessibility, SEO, or Core Web Vitals issues for pages served through its edge network; Netlify provides deployment logs, function logs, build summaries, and traffic analytics — not front-end quality analysis with actionable plain-English recommendations |
| ADA Title II compliance monitoring | ✓ Yes — WCAG audit + alert on accessibility regression | No — Netlify Edge Functions does not audit or alert on WCAG compliance for pages served through its edge network; government agencies, nonprofits, and educational institutions using Netlify for their websites face ADA Title II compliance requirements with an April 24, 2026 deadline; Edge Functions auto-deploy on every git push and can transform response HTML in ways that may inadvertently modify accessibility-relevant markup (ARIA attributes, alt text, landmark roles); these transformations bypass pre-deployment accessibility testing and can introduce new WCAG violations without triggering alerts; PageGuard provides continuous post-deployment monitoring of the live production URL as delivered through the edge layer |
| Works on any deployed platform | ✓ Yes — scans any URL on any hosting or platform | Netlify Edge Functions run within the Netlify platform and serve traffic for Netlify-hosted sites; Edge Functions cannot be used to monitor or audit websites hosted on other platforms like Vercel, Cloudflare, AWS, or self-hosted servers; Netlify focuses exclusively on its own platform's request pipeline without cross-platform quality monitoring capability |
| Independent external audit | ✓ Yes — third-party scan, shareable URL for clients/stakeholders | No — Netlify provides no built-in tool to generate a shareable external front-end health report for pages served through its edge functions; Netlify provides deployment status, function invocation logs, analytics dashboards, and build summaries — not WCAG accessibility scores or SEO 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 pages served through Netlify Edge Functions; auditing a Netlify site using Edge Functions for WCAG accessibility, Core Web Vitals, or SEO quality requires running separate third-party tools against the public URL after deployment; Netlify Edge Functions has no concept of scanning the HTML quality of the responses it serves and transforms at the edge |
| Multi-site dashboard | ✓ Yes — 1–50 sites depending on plan | Netlify dashboard shows all deployed sites with deployment history, function logs, analytics, forms, identity, and edge function invocations within a Netlify account; there is no cross-site health dashboard showing WCAG compliance, SEO quality, or Core Web Vitals for sites using Netlify Edge Functions |
| Pricing for health monitoring | ✓ Free + from $9/mo for automated monitoring | Health monitoring not available — Netlify Edge Functions pricing is based on invocations: free tier includes 125,000 invocations/month; Pro plan ($19/mo per member) includes 2M invocations/month; additional invocations billed per million; no front-end quality monitoring at any price tier regardless of plan level |
Get WCAG accessibility scores and Core Web Vitals for any website on Netlify, including Edge Function-delivered pages. Results in 30 seconds. No Netlify account access required.
Results in ~30 seconds. 4 scores: Performance, Accessibility, SEO, Best Practices.
Yes — PageGuard scans the final HTML delivered to users, including content transformed by Netlify Edge Functions. Paste your live production URL into PageGuard for a full health report covering WCAG accessibility, Core Web Vitals, SEO, and best practices in ~30 seconds. No Netlify account access or code modifications required.
Yes — Edge Functions can transform response HTML by injecting scripts, modifying attributes, or personalizing markup after your pre-deployment tests have run. These transformations may inadvertently modify ARIA attributes, alt text, form labels, or heading hierarchy in ways that create new WCAG violations. PageGuard scans the final edge-delivered HTML and alerts you when accessibility scores drop after Edge Function changes are deployed.
Netlify Edge Functions execute at CDN nodes closest to each visitor with sub-millisecond cold starts, which typically reduces TTFB and improves LCP compared to origin-server requests. However, Edge Functions that inject large personalization scripts or delay HTML streaming can counteract these gains. PageGuard measures your actual LCP, FCP, and CLS scores as delivered through the edge layer, giving you objective Core Web Vitals data after Edge Function transformations are applied.
No — they serve completely different purposes. Netlify Edge Functions is a Deno-based compute layer that runs JavaScript globally at CDN nodes for personalization, A/B testing, authentication, and response transformation at ultra-low latency. PageGuard is an external quality monitoring tool that audits the front-end HTML ultimately delivered to users for WCAG compliance, Core Web Vitals, and SEO quality. Teams using Netlify Edge Functions should add PageGuard to verify edge transformations do not introduce accessibility regressions.