AI-powered smart suggestions for websites. Turn dead-end 404 pages into conversion pathways with intelligent content matching. One line of code. Setup in 5 minutes.
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Sources: Chartbeat 2024; Baymard Institute 2023; Ahrefs Link‑Rot Study 2024; Adobe eCommerce Survey 2024
Smart404 uses advanced pattern matching and content analysis to instantly suggest the most relevant pages when visitors hit a 404 error. No more lost customers, no more frustrated users.
Smart404 monitors your site in real-time, instantly detecting when a visitor lands on a non-existent page.
Our AI analyzes the attempted URL, identifying patterns, keywords, and likely user intent from the broken link.
Within milliseconds, Smart404 presents the most relevant pages from your site, turning frustration into engagement.
Every 404 error is a potential customer walking out of your store. Smart404 turns those exits into opportunities.
<script src="https://cdn.smart404.io/v1/smart404.js" data-key="YOUR_API_KEY"></script>
Add this before your closing </body> tag. Smart404 handles everything else automatically.
// In gatsby-ssr.js or gatsby-browser.js
export const onRenderBody = ({ setPostBodyComponents }) => {
setPostBodyComponents([
<script
key="smart404"
src="https://cdn.smart404.io/v1/smart404.js"
data-key="YOUR_API_KEY"
/>
])
}// In pages/_document.js
import Script from 'next/script'
<Script
src="https://cdn.smart404.io/v1/smart404.js"
data-key="YOUR_API_KEY"
strategy="lazyOnload"
/>{{/* In layouts/partials/footer.html */}}
<script src="https://cdn.smart404.io/v1/smart404.js"
data-key="{{ .Site.Params.smart404Key }}"></script>No jQuery, no frameworks, no bloat. Just pure, optimized JavaScript that works everywhere.
Served from global edge locations. Your 404 handling is as fast as your static content.
Responsive design and touch-friendly interfaces work perfectly on all devices.
Pure JavaScript implementation with zero server-side dependencies. Works seamlessly with CDNs and edge networks.
Intelligent content analysis suggests the most relevant pages based on URL patterns and content similarity.
Track 404 occurrences, user behavior, and conversion recovery rates with detailed insights.
One line of JavaScript. Compatible with all static site generators - Gatsby, Next.js, Hugo, Jekyll, and more.
Maintains proper HTTP status codes and helps recover lost search engine rankings from broken links.
Update redirect rules and suggestions without rebuilding your site. Changes propagate instantly.
Don't settle for ugly default 404 pages. Choose from our professionally designed templates that match your brand and keep users engaged.
Don't see what you need? Use our visual template builder to create custom 404 pages that perfectly match your brand. No coding required.
Don't wait for users to find broken links. Our intelligent crawler continuously monitors your static site and alerts you to issues before they impact your visitors.
Our crawler automatically discovers and maps all pages and links across your static site, respecting robots.txt and crawl budgets.
Continuous monitoring checks all internal and external links, detecting broken links, redirects, and slow-loading resources.
Get instant notifications via email, Slack, or webhook when new broken links are detected, with priority levels and fix suggestions.
Available exclusively with Premium Plan ($29/month)
Upgrade to Premium PlanWhen products go out of stock or URLs change, Smart404 automatically suggests similar products, keeping customers shopping instead of leaving.
"Reduced cart abandonment by 23% after implementing Smart404" - JAMstack Store Owner
API versions change, docs move. Smart404 helps developers find the right documentation version or alternative resources instantly.
"Our support tickets dropped 40% - users find what they need" - Tech Lead
Campaign URLs expire, landing pages change. Don't lose those expensive PPC clicks - convert them with intelligent suggestions.
"Recovered 67% of dead-link traffic from old campaigns" - Marketing Director
Real-time data • Export to CSV • Google Analytics integration • Custom API access
Convert 73% of 404 errors into engaged users who find what they need and stay on your site.
No developer time needed. Add one line of code and you're done. No server changes, no build process updates.
See results within hours of installation. Every recovered visitor is immediate revenue that would have been lost forever.
Lower bounce rates and better user experience signals help maintain and improve your search rankings.
Real Customer Result:
"Smart404 recovered $12,000 in lost sales in our first month. The tool paid for itself in 3 days." - E-commerce Director
Based on 73% recovery rate + 1% conversion
Start Free Trial
(Example feedback from our private beta testers)
"Finally, a 404 solution that doesn't require server-side processing. Integrated it with our Gatsby site in literally 2 minutes. The AI suggestions are surprisingly accurate."
"Our bounce rate from 404 errors dropped by 68% in the first week. The ROI calculator was actually conservative - we're seeing even better results."
"As an agency, we've added Smart404 to our standard stack. Clients love the analytics, and it's one less custom solution we need to build."
Absolutely not. Smart404 is loaded asynchronously and only activates on 404 errors. Our script is under 15KB (gzipped) and served from a global CDN. Your site's performance remains unchanged.
Smart404 works at the browser level, not the build level. Just add our script tag to your site template, and it works automatically with any SSG - Gatsby, Next.js, Hugo, Jekyll, 11ty, or plain HTML.
Yes! Smart404 comes with beautiful default themes, but you have full control via CSS. Use our theme builder or write custom CSS to match your brand perfectly.
Smart404 actually helps your SEO. We maintain proper 404 status codes for search engines while providing a better user experience. This reduces bounce rates and helps preserve your rankings.
Our AI achieves 85-95% relevance scores based on URL pattern matching, content analysis, and user behavior. The system continuously learns and improves from user interactions.
Yes! Every plan includes a 14-day free trial with full features. No credit card required to start. We're confident you'll see the value immediately.
Email support for all plans with <24 hour response time. Premium plans include priority support and live chat. We also have extensive documentation and an active community Discord.
Join 1,200+ developers who've reduced bounce rates by 73%
🔒 Secure sign-up • 30-day free trial • Cancel anytime
After years of building static sites and watching analytics show high bounce rates from 404 errors, I knew there had to be a better way. Smart404 is the solution I wished existed - intelligent, fast, and developer-friendly.
Privacy-first design with minimal data collection
Enterprise-grade security standards
Global CDN with automatic failover
All data encrypted in transit