JSONSelect

".author .drinkPref :first-child"

{
  "author": {
    "name": {
      "first": "Lloyd",
      "last": "Hilaiel"
    },
    "drinkPref": [
      "whiskey",
      "beer",
      "wine"
    ],
  },
  "thing": "JSONSelect site",
  "license": "(cc) BY-SA"
}

JSONSelect is an experimental selector language for JSON.

It makes it easy to access data in complex JSON documents.

It feels like CSS.

Why not give it a try?

Current Selector (click to edit):

{
    "name": {
        "first": "Lloyd",
        "last": "Hilaiel"
    },
    "favoriteColor": "yellow",
    "languagesSpoken": [
        {
            "lang": "Bulgarian",
            "level": "advanced"
        },
        {
            "lang": "English",
            "level": "native",
            "preferred": true
        },
        {
            "lang": "Spanish",
            "level": "beginner"
        }
    ],
    "seatingPreference": [
        "window",
        "aisle"
    ],
    "drinkPreference": [
        "whiskey",
        "beer",
        "wine"
    ],
    "weight": 156
}

Choose A Selector...

.languagesSpoken .lang

.drinkPreference :first-child

.seatingPreference :nth-child(1)

."weight"

.lang

.favoriteColor

string.favoriteColor

string:last-child

string:nth-child(-n+2)

string:nth-child(odd)

string:nth-last-child(1)

:root

number

:has(:root > .preferred)

.preferred ~ .lang

:has(.lang:val("Spanish")) > .level

.lang:val("Bulgarian") ~ .level

.weight:expr(x<160) ~ .name .first

JSONSelect is dedicated to sad code everywhere that looks like this:

if (foo && foo.bar && foo.bar.baz && foo.bar.baz.length > 2)
    return foo.bar.baz[2];
return undefined;

Lloyd Hilaiel started it, and is surrounded by many awesome contributors.

Dave Herman provided the name, and lots of encouragement.

Mike Hanson gave deep feedback and ideas.

John Resig unwittingly contributed his design thoughts.

The jsonselect.org site design was inspired by Stephen Wildish.

JSON and CSS3 Selectors are the prerequisites to JSONSelect's existence, so thanks to you guys too.

Loading documentation...

Several different implementations of JSONSelect are available:

JavaScript: Get it documented, or minified (2.9k minified and gzipped). The code is on github.

node.js: npm install JSONSelect

ruby: A gem by Simon Menke: https://github.com/fd/json_select

go: A go implementation by Adam Coddington

python: A python port by Matthew Hooker

couchdb: JSONSelect integration for couchdb by Ryan Ramage

php: A php implementation by @observu

Something missing from this list? Please, tell me about it.