Firebase - Invalid JSON data or key values. Key values can’t contain $ # [ ] / or

Question

I\'m trying to import my JSON file into my Firebase but it keeps giving me this error. I don\'t know why this JSON file isn\'t allowed to be imported into since JSONLint say

Answer 1

Two things that might help someone else save a couple of hours of head scratching:

1) Empty strings are valid JSON keys, they're NOT valid Firebase keys.

2) While the web tool error message is horrible, the command-line tool actually provides useful information like, say, a line number (nice when you have a 300K+ line file)

E.g.

firebase --project database:set / import.json

to overwrite everything from the root