Follow this step-by-step tutorial to register your developer application and get your Client ID.
Go to the developer portal dashboard and log in with your normal Spotify account details:
Open Spotify DashboardClick on the green "Create App" button in the top-right corner of the dashboard.
Enter the basic info for your application:
• App Name: Playlist Info Exporter
• Description: Spotify playlist metadata and language info exporter.
In the application creation form, fill the redirect details:
• Redirect URI: Enter the website URL exactly (e.g. https://playlistinfoexporter.vercel.app/ or http://localhost:8080/ if testing locally).
• Which API are you planning to use: Select the checkmark for Web API.
• Read and accept the developer terms, then click Save.
Click on your newly created app dashboard card and choose Settings in the top right. Under Basic Information, you will see your Client ID. Copy it, paste it into the login card of the Playlist Info Exporter app, and click connect!