Error AtlasError Documentation and Resolution
Back to searchMore Vite errors

Vite

Vite dev server port already in use

Port 5173 is already in use

Vite cannot start its dev server because another process is already bound to the requested port.

Port 5173 is already in usedevelopment servers

Observed message

Port 5173 is already in use

Why it happens

  • Another Vite or Node process is still running in the background.
  • A different local tool is already listening on port 5173.
  • The project hardcodes the port without fallback logic.

How to fix it

  1. Stop the existing process using the port with platform-appropriate tools.
  2. Restart the dev server after confirming the port is free.
  3. Change the Vite port in the config or run the dev server on an alternate port.

Related errors

Error: Cannot find module 'C:\foo\bar&baz\vite\bin\vite.js'Vite cannot start because the project path contains an ampersand on WindowsCross drive links on WindowsVite cross-drive links do not work on WindowsRequests are stalled foreverVite dev server requests are stalled forever431 Request Header Fields Too LargeVite dev server returns 431 Request Header Fields Too Large

Explore more

ViteBrowse more Vite errorsdevelopment serversBrowse more development servers errors
Vite Port 5173 is already in use: fixes for local dev | Error Atlas