What is FlowCanary?
FlowCanary is a free 30-second health check for web apps built with Lovable, Bolt, Replit, v0 and Cursor. You paste a public URL and get a report on what real visitors and Google see, with a copy-paste fix prompt for each issue, tailored to the tool you built with. No signup is needed.
Who it's for
Founders and makers who build with AI app builders and don't read every line of the generated code, and anyone who wants to know whether a live app is broken before their users notice.
What the free check looks at
- Homepage loads: status, speed, redirects, HTTPS
- Key pages found: signup, login, pricing, checkout, contact, privacy, terms
- Broken links on your site
- What Google sees: raw HTML vs a real browser, including blank single-page-app detection
- Indexability: robots.txt, sitemap, noindex, title, description, canonical and og:image
- Builder detection, so fix prompts match the tool you used
- JavaScript console errors
- Forms appear after load and nothing overflows on phones
How it works
The check is passive. FlowCanary makes ordinary GET/HEAD requests and loads pages in a headless browser like a normal visitor. It never clicks, types, submits forms, logs in or creates accounts. It stores the URL you submit, the scan results and a hashed IP address for rate limiting.
How FlowCanaryBot behaves · Privacy
What it doesn't do
It doesn't check pages behind a login, process payments, or do security or penetration testing.
Plans and prices
- Free health check: $0, no signup.
- Daily monitoring of your signup, login and checkout: in development; founding spots $19/month, price locked for life, first 50 founders, no payment until it launches.
Guides
- Lovable App Not Showing on Google? Here's How to Find the Real Cause
- Lovable Stripe Checkout Not Working? Find Which Link in the Chain Broke
- Supabase Auth Broke After Deploy? The Usual Suspects, in Order
- Bolt.new App Shows a Blank Page After Deploy? Fix the White Screen
- Why Is My React SPA Not Indexed by Google?
- A No-Code Checkly Alternative for Founders Who Don't Write Playwright
- Lovable App Works in Preview but Not When Published? Find the Difference
Key links
FlowCanary at getflowcanary.com is not affiliated with other products or accounts that use the FlowCanary name.