There should be an option to download the original upload .pkpass file.

When trying to scan a card, which has a dark background, a scanner will fail to scan the code.
It would be good if the QR Code would have a white margin around it.

For the order of the passes, there should be an option to change the relevant date, if it is not correctly converted or not detected at all.

I imported a boarding pass from SWISS but it did not contain any barcode. After some investigation i found out that inside the pkpass JSON pass.json is a barcodes property, but the application is looking for a barcode property.

The barcodes property looks like this:

"barcodes": [{
    "format": "PKBarcodeFormatAztec",
     "message": "XXXX",
     "messageEncoding": "iso-8859-1"
}],

message is a long string of personal information about the flight where each detail is separated by varying amounts of white space.

I also noticed that no translations are loaded, so some important details are missing.

I'm curious about your application, but not interested in creating an account. If creating an account would be optional, I would be willing to give it a try and might create an account later.

For more usability, there should be a search field, to find passes with a matching title.

There should be a function, where you can change the title of a pass.

There is no way to recompile the provided code. Are there some basic Requirements or Steps to run the code?

If you want to upload a pass in Safari for iOS, it does not show up the new pass.