Why Your v0 or Bolt App Fails to Deploy on Vercel (and How to Fix It)

Encountering deployment issues with v0 or Bolt apps on Vercel can be frustrating. To resolve these problems, examine the build log for the first red line indicating the root cause. Common reasons include TypeScript errors, missing environment variables, module resolution conflicts, dependency issues, rendering errors, incorrect framework settings, and Node.js version mismatches.

For TypeScript errors, run the build locally and address each error. As a temporary workaround, you can disable type checking in next.config.js, but this is not a long-term solution.

Ensure all required environment variables, such as supabaseUrl or API keys, are set in Vercel's Project Settings under Environment Variables. If variables are accessed in the browser, prefix them with NEXT_PUBLIC_.

Regarding module resolution, note that Vercel utilizes Linux, so file paths must match the case. Utilize git mv for case-sensitive renames. Address dependency conflicts by aligning package.json versions, or use npm install --legacy-peer-deps as a fallback.

If prerendering a page yields errors, move browser-specific code into useEffect, or make the route dynamic by setting the dynamic property to true. For Bolt or Vite apps, configure the correct framework preset, build command, and output directory. Add vercel.json for client-side routing.

Lastly, ensure your Node.js version aligns with Vercel's supported versions (24.x or 22.x). If your project specifies Node.js 20, it will encounter a version mismatch error. Update the Node.js version in Project Settings or by adding engines.node in package.json.