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jp

jp is a command line tool that reformats JSON to make it easier to read:

$ cat names.json
{"names":["Alice","Bob"]}
$ jp names.json
{
  "names": [
    "Alice",
    "Bob"
  ]
}

It only adds and removes whitespace, which means that your data won’t get silently altered. For example, "\u2603" won’t get converted to "☃", and 1.1e1 won’t turn into 11. The ordering remains the same, and invalid JSON can be reformatted (within reason). This stuff shouldn’t matter, but people make mistakes even with a well defined format like JSON, and accurate tools are important when you’re trying to work out what’s gone wrong.

For more information see the project homepage.

Installing

Using Homebrew:

brew install paulhammond/tap/jp

If you don't use Homebrew you can download a precompiled binary and copy the jp file inside to somewhere in your path.

Using

To prettify a JSON file:

jp data.json

To prettify from stdin, use - as the filename:

curl -sL https://phmmnd.me/names.json | jp -

To compact a JSON file:

jp --compact data.json

To get help:

jp --help