Sure, here are the steps to make a Spotify playlist QR code:

1. Open Spotify on your device.
2. Navigate to the playlist that you want to share.
3. Click on the three dots (more options) next to the playlist.
4. Click on "Share".
5. You will see an option called "Spotify Code" at the bottom of the share options. Click on it.
6. A barcode will appear at the bottom of the album art. This is your Spotify Code (or QR code).
7. To save this code, click on the code. A prompt will appear asking if you want to save the image. Click "Save to Photos".
8. Now you have a Spotify Code saved as an image. You can share this image with others, and they can scan it using the Spotify app to instantly access your playlist.

Remember, the person scanning the code will need to use the Spotify app. They can do this by going to the search tab and clicking on the camera icon in the search bar. Then they just need to point their camera at the code to scan it.