Web Crawler Simulator
Test how 20+ search engine and AI crawlers see your Lovable app or website. Verify robots.txt rules, check content visibility, and get a prompt to fix issues.
Test Any Crawler
Select a crawler and enter your URL to see what the bot sees.
AI / LLM
Crawlers used by AI chatbots and large language models to fetch web content for answers and training.
Search Engines
Crawlers used by major search engines to index web pages for search results.
Social Media
Crawlers used by social media platforms to generate link preview cards.
Enterprise
Crawlers used by enterprise tools and services for data collection and indexing.
Why Crawler Visibility Matters for Lovable Apps
When you build with Lovable, your app is a single-page application (SPA) by default. SPAs load content dynamically with JavaScript — which means crawlers like Googlebot might see an empty page instead of your actual content. If Google can't see your content, it can't index it. If it can't index it, no one finds your app through search. AI assistants like ChatGPT and Perplexity have the same problem — they can only cite what their crawlers can access.
Simulate key crawlers
Start with Googlebot to check search visibility, then try GPTBot and ClaudeBot to check AI visibility. Each crawler has different capabilities — some can render JavaScript, others can't.
Check the word count and heading structure
If the crawler sees very few words or no headings, your content isn't being rendered server-side. This is common with SPAs. Look at the 'Body Content' section to see exactly what text the crawler can read.
Look for the SPA shell warning
If the tool detects an SPA shell, it means crawlers are seeing a mostly empty page with duplicate shell-level meta tags. This is the #1 SEO problem for Lovable apps.
Fix with server-side rendering
Ask Lovable to enable server-side rendering (SSR) or pre-rendering for your key pages. This ensures crawlers see fully rendered HTML with all your content, headings, and meta tags.
Example prompt to paste into Lovable:
Enable server-side rendering (SSR) for my app's main pages so that search engines and AI crawlers can see the full content. Specifically: - Make sure the homepage renders full HTML on the server - Ensure all meta tags (title, description, og:title, og:image) are in the initial HTML response - Add proper <h1> headings that are visible without JavaScript - Make sure the canonical URL is set correctly for each page
Run this simulator after every major update to your Lovable app. Content that was visible to crawlers yesterday might not be visible after a routing change or a new component that loads data client-side. Regular testing ensures your app stays discoverable.
More Free SEO Tools
Continue auditing your site with these companion tools.
Launch Checklist
Score your app across 35 launch-readiness checks
Meta Tag Audit
Audit title, OG, Twitter cards & more
SEO & AI Crawler Audit
Full technical SEO and AI visibility audit
Robots.txt Analyzer
Check which crawlers are allowed or blocked
OG Image Previewer
Preview social media link cards
Security Headers
Scan for missing security headers with A-F grades
Crawlers see your content. Bugwarden sees every error your users hit.
This tool shows what bots see. Bugwarden monitors what your real users experience — and gives you a prompt to fix every error. Set up in 30 seconds.
Sign up and we'll reach out to help you set up Bugwarden for your Lovable app.