Lovable
Lovable deployment failed? Find where it broke
Separate a preview, Publish, Vercel build or live 404 problem.
Open the guide →Free launch tools · Private in your browser
Your AI-built app works in preview. Let’s get it live.
Paste a failed build log to find likely causes and the first checks to make. Then choose a hosting path that fits your app, framework and project use.
For Lovable, Bolt, Vercel, Cursor, Replit, Claude Code and other AI app builders.
The launch path
From error to next step
- 01
Paste a redacted build log
Common failure patterns are matched locally.
- 02
Check the likely cause
Get a short list of steps and a prompt to copy.
- 03
Pick a launch path
Compare hosting by framework and how the app will be used.
Your log and project files stay on your device. The checker does not run or change your code.
Deployment error checker
Find the first useful clue in your build log.
Paste the relevant error lines, not secrets or private credentials. The checker looks for common build and deployment problems, then gives you a focused repair prompt to use with your coding assistant.
Only common build errors are recognized. This is a first check, not a complete code review.
0 / 16,000Analysis runs in this browser and the text is not saved or uploaded. Remove API keys, passwords, tokens and private URLs before pasting logs.
How this checker works
Find the first useful clue.
- It looks for common build failures such as missing packages, environment settings, TypeScript errors and output folders.
- It runs on this page. No AI service or hosting account is connected.
- It does not change your project. Review the suggested checks and confirm them in your code and host settings.
Hosting decision helper
Choose a host that matches the app you actually built.
Paste your package.json or select a framework. Then compare ease, cost and the needs of a personal demo or commercial project.
The manifest is checked in this browser and is not uploaded. Do not paste API keys or other secrets.
A sensible starting point
Vercel
Hobby for personal demos · Pro for commercial projects
A documented deployment route for current Lovable/TanStack Start projects, Next.js apps and GitHub-based frontends.
Current Lovable projects use TanStack Start and Vercel documents zero-configuration deployment when the framework helper meets its version requirement.
Vercel says Hobby is for personal, non-commercial use. Choose a commercial plan before you use the app for business or revenue.
Check Vercel plansThis is a starting recommendation, not a quote. Hosting prices, limits and included services can change.
Step-by-step fixes
Get help for the problem you’re seeing.
Provider settings differ by framework and by the generation of the project. These guides explain what to check before changing configuration or paying for another host.
Lovable → Vercel
App works in preview but Vercel shows 404
Identify the project setup before changing routes or build settings.
Open the guide →Custom domain
Lovable custom domain not working?
Check the exact DNS or SSL status before changing records.
Open the guide →Bolt.new
Bolt will not publish or deploy
Separate a preview problem from a publish or external build failure.
Open the guide →Build logs
Find the first useful build error
Work through missing packages, TypeScript, Node versions and output folders.
Open the guide →Hosting
Choose where to host an AI-built app
Compare options based on framework, commercial use and the services your app needs.
Open the guide →Local log analysis
The pasted text is compared with known patterns on this page. It is not uploaded to a server or sent to an AI model.
Practical next checks
The result is a starting point, not a full code review. Verify the fix in your project and the provider’s current documentation.
Clear hosting trade-offs
Recommendations consider framework, commercial use and app services. Prices, included limits and provider terms can change.
Frequently asked questions
About the deployment checker
Does this checker upload my deployment log?
No. The log is checked in your browser and is not sent to this site or an AI service. Remove passwords, API keys, tokens and private URLs before pasting it.
Can it fix my app automatically?
No. It matches common error patterns and gives you a focused checklist and a prompt you can copy into your coding assistant. You decide what to change and should review it before deploying.
Which tools does it support?
The checks apply to common deployment logs from Lovable, Bolt, Vercel, Cursor, Replit, Claude Code and other tools that generate web apps. The provider-specific guides explain when a fix applies to one framework or host.
Can I use this for a commercial app?
Yes. The hosting finder asks whether the project is commercial and points you to provider terms to check. Review the live plan, pricing and commercial-use rules before launch.