Pokémon type chart as a JSON.

type-chart.json

{
  "normal": {
    "normal": 1,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 1,
    "fighting": 1,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 1,
    "bug": 1,
    "rock": 0.5,
    "ghost": 0,
    "dragon": 1,
    "dark": 1,
    "steel": 0.5
  },
  "fire": {
    "normal": 1,
    "fire": 0.5,
    "water": 0.5,
    "electric": 1,
    "grass": 2,
    "ice": 2,
    "fighting": 1,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 1,
    "bug": 2,
    "rock": 0.5,
    "ghost": 1,
    "dragon": 0.5,
    "dark": 1,
    "steel": 2
  },
  "water": {
    "normal": 1,
    "fire": 2,
    "water": 0.5,
    "electric": 1,
    "grass": 0.5,
    "ice": 1,
    "fighting": 1,
    "poison": 1,
    "ground": 2,
    "flying": 1,
    "psychic": 1,
    "bug": 1,
    "rock": 2,
    "ghost": 1,
    "dragon": 0.5,
    "dark": 1,
    "steel": 1
  },
  "electric": {
    "normal": 1,
    "fire": 1,
    "water": 2,
    "electric": 0.5,
    "grass": 0.5,
    "ice": 1,
    "fighting": 1,
    "poison": 1,
    "ground": 0,
    "flying": 2,
    "psychic": 1,
    "bug": 1,
    "rock": 1,
    "ghost": 1,
    "dragon": 0.5,
    "dark": 1,
    "steel": 1
  },
  "grass": {
    "normal": 1,
    "fire": 0.5,
    "water": 2,
    "electric": 1,
    "grass": 0.5,
    "ice": 1,
    "fighting": 1,
    "poison": 0.5,
    "ground": 2,
    "flying": 0.5,
    "psychic": 1,
    "bug": 0.5,
    "rock": 2,
    "ghost": 1,
    "dragon": 0.5,
    "dark": 1,
    "steel": 0.5
  },
  "ice": {
    "normal": 1,
    "fire": 0.5,
    "water": 0.5,
    "electric": 1,
    "grass": 2,
    "ice": 0.5,
    "fighting": 1,
    "poison": 1,
    "ground": 2,
    "flying": 2,
    "psychic": 1,
    "bug": 1,
    "rock": 1,
    "ghost": 1,
    "dragon": 2,
    "dark": 1,
    "steel": 0.5
  },
  "fighting": {
    "normal": 2,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 2,
    "fighting": 1,
    "poison": 0.5,
    "ground": 1,
    "flying": 0.5,
    "psychic": 0.5,
    "bug": 0.5,
    "rock": 2,
    "ghost": 0,
    "dragon": 1,
    "dark": 2,
    "steel": 2
  },
  "poison": {
    "normal": 1,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 2,
    "ice": 1,
    "fighting": 1,
    "poison": 0.5,
    "ground": 0.5,
    "flying": 1,
    "psychic": 1,
    "bug": 1,
    "rock": 0.5,
    "ghost": 0.5,
    "dragon": 1,
    "dark": 1,
    "steel": 0
  },
  "ground": {
    "normal": 1,
    "fire": 2,
    "water": 1,
    "electric": 2,
    "grass": 0.5,
    "ice": 1,
    "fighting": 1,
    "poison": 2,
    "ground": 1,
    "flying": 0,
    "psychic": 1,
    "bug": 0.5,
    "rock": 2,
    "ghost": 1,
    "dragon": 1,
    "dark": 1,
    "steel": 2
  },
  "flying": {
    "normal": 1,
    "fire": 1,
    "water": 1,
    "electric": 0.5,
    "grass": 2,
    "ice": 1,
    "fighting": 2,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 1,
    "bug": 2,
    "rock": 0.5,
    "ghost": 1,
    "dragon": 1,
    "dark": 1,
    "steel": 0.5
  },
  "psychic": {
    "normal": 1,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 1,
    "fighting": 2,
    "poison": 2,
    "ground": 1,
    "flying": 1,
    "psychic": 0.5,
    "bug": 1,
    "rock": 1,
    "ghost": 1,
    "dragon": 1,
    "dark": 0,
    "steel": 0.5
  },
  "bug": {
    "normal": 1,
    "fire": 0.5,
    "water": 1,
    "electric": 1,
    "grass": 2,
    "ice": 1,
    "fighting": 0.5,
    "poison": 0.5,
    "ground": 1,
    "flying": 0.5,
    "psychic": 2,
    "bug": 1,
    "rock": 1,
    "ghost": 0.5,
    "dragon": 1,
    "dark": 2,
    "steel": 0.5
  },
  "rock": {
    "normal": 1,
    "fire": 2,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 2,
    "fighting": 0.5,
    "poison": 1,
    "ground": 0.5,
    "flying": 2,
    "psychic": 1,
    "bug": 2,
    "rock": 1,
    "ghost": 1,
    "dragon": 1,
    "dark": 1,
    "steel": 0.5
  },
  "ghost": {
    "normal": 0,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 1,
    "fighting": 1,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 2,
    "bug": 1,
    "rock": 1,
    "ghost": 2,
    "dragon": 1,
    "dark": 0.5,
    "steel": 0.5
  },
  "dragon": {
    "normal": 1,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 1,
    "fighting": 1,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 1,
    "bug": 1,
    "rock": 1,
    "ghost": 1,
    "dragon": 2,
    "dark": 1,
    "steel": 0.5
  },
  "dark": {
    "normal": 1,
    "fire": 1,
    "water": 1,
    "electric": 1,
    "grass": 1,
    "ice": 1,
    "fighting": 0.5,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 2,
    "bug": 1,
    "rock": 1,
    "ghost": 2,
    "dragon": 1,
    "dark": 0.5,
    "steel": 0.5
  },
  "steel": {
    "normal": 1,
    "fire": 0.5,
    "water": 0.5,
    "electric": 0.5,
    "grass": 1,
    "ice": 2,
    "fighting": 1,
    "poison": 1,
    "ground": 1,
    "flying": 1,
    "psychic": 1,
    "bug": 1,
    "rock": 2,
    "ghost": 1,
    "dragon": 1,
    "dark": 1,
    "steel": 0.5
  }
}

@megahypercat I ended up rewriting this thing as a proper JSON. I don't know what you wanna do with it, but please be aware this is super old, as there's no Fairy type in this chart and maybe some values are incorrect (Dark doesn't have 0.5 effectiveness against Steel anymore, etc). :D

thanks for updating it <3

Very useful. Made a JSON Gist with the inverse of this that shows the weaknesses of a type in the same format.

I love you

Did the same thing, but made sure all values get parsed as doubles for anyone that may need that.

type_weaknesses type_strengths