MultiMC and OptiFine

Minecraft versions which have Forge

Just use OptiFine like any other Forge mod.

Minecraft versions that don't have Forge

• Make a new instance in MultiMC with the wanted version of Minecraft.

• Click Edit Instance - it should open the Version page of the instance.

• Click Add Empty.

• Set uid to optifine.OptiFine and name to OptiFine.

• Select the newly created component and click Edit - this should open the file in a text editor.

• Edit the JSON to look like one of the examples, then save the file.

• Download OptiFine and save the jar file in <Instance>/libraries/. Create it if it doesn't exist.

  If you look at the whole path, it should be something like this:

  .../MultiMC/instances/<Instance>/libraries/OptiFine_1.13_HD_U_E3_beta4.jar
  

• Launch the instance from MultiMC

If the example doesn't fit the OptiFine version exactly, change the version. For example replace all occurences of 1.7.10_HD_U_E3 with 1.7.10_HD_U_F1.

You can use the version page to check the file for errors - obvious mistakes will show up in the Version page as soon as you click the Refresh button.

If the JSON file doesn't open in a text editor, make sure your operating system is set up to open .json files in one first.

Examples

Minecraft 1.13 with OptiFine 1.13_HD_U_E3_beta4

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:preview_OptiFine:1.13_HD_U_E3_beta4",
            "MMC-hint": "local",
            "MMC-filename": "preview_OptiFine_1.13_HD_U_E3_beta4.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.13"
        }
    ],
    "name": "OptiFine",
    "version": "1.13_HD_U_E3_beta4"
}

Minecraft 1.12.2

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.12.2_HD_U_C7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.12.2_HD_U_C7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.12.2"
        }
    ],
    "name": "OptiFine",
    "version": "1.12.2_HD_U_C7"
}

Minecraft 1.12.1

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.12.1_HD_U_C7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.12.1_HD_U_C7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.12.1"
        }
    ],
    "name": "OptiFine",
    "version": "1.12.1_HD_U_C7"
}

Minecraft 1.12

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.12_HD_U_C7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.12_HD_U_C7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.12"
        }
    ],
    "name": "OptiFine",
    "version": "1.12_HD_U_C7"
}

Minecraft 1.11.2

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.11.2_HD_U_C7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.11.2_HD_U_C7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.11.2"
        }
    ],
    "name": "OptiFine",
    "version": "1.11.2_HD_U_C7"
}

Minecraft 1.11

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.11_HD_U_C7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.11_HD_U_C7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.11"
        }
    ],
    "name": "OptiFine",
    "version": "1.11_HD_U_C7"
}

Minecraft 1.10.2

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.10.2_HD_U_E7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.10.2_HD_U_E7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.10.2"
        }
    ],
    "name": "OptiFine",
    "version": "1.10.2_HD_U_E7"
}

Minecraft 1.10

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.10_HD_U_E7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.10_HD_U_E7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.10"
        }
    ],
    "name": "OptiFine",
    "version": "1.10_HD_U_E7"
}

Minecraft 1.9.4

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.9.4_HD_U_E7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.9.4_HD_U_E7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.9.4"
        }
    ],
    "name": "OptiFine",
    "version": "1.9.4_HD_U_E7"
}

Minecraft 1.9.2

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.9.2_HD_U_E3",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.9.2_HD_U_E3.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.9.2"
        }
    ],
    "name": "OptiFine",
    "version": "1.9.2_HD_U_E3"
}

Minecraft 1.9

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.9.0_HD_U_E7",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.9.0_HD_U_E7.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.9"
        }
    ],
    "name": "OptiFine",
    "version": "1.9.0_HD_U_E7"
}

Minecraft 1.8.9

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.8.9_HD_U_I3",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.8.9_HD_U_I3.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.8.9"
        }
    ],
    "name": "OptiFine",
    "version": "1.8.9_HD_U_I3"
}

Minecraft 1.8.8

This one is currently broken. The 1.8.8 download is 1.8.9 and it fails to load.

Minecraft 1.8

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.8.0_HD_U_I3",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.8.0_HD_U_I3.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.8"
        }
    ],
    "name": "OptiFine",
    "version": "1.8.0_HD_U_I3"
}

Minecraft 1.7.10

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.7.10_HD_U_E3",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.7.10_HD_U_E3.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.7.10"
        }
    ],
    "name": "OptiFine",
    "version": "1.7.10_HD_U_E3"
}

Minecraft 1.7.2

{
    "formatVersion": 1,
    "+libraries": [
        {
            "name": "net.minecraft:launchwrapper:1.12"
        },
        {
            "name": "optifine:OptiFine:1.7.2_HD_U_F3",
            "MMC-hint": "local",
            "MMC-filename": "OptiFine_1.7.2_HD_U_F3.jar"
        }
    ],
    "+tweakers": [ "optifine.OptiFineTweaker" ],
    "fileId": "optifine.OptiFine",
    "mainClass": "net.minecraft.launchwrapper.Launch",
    "requires": [
        {
            "uid": "net.minecraft",
            "equals": "1.7.2"
        }
    ],
    "name": "OptiFine",
    "version": "1.7.2_HD_U_F3"
}

Troubleshooting and FAQ

• java.lang.ClassDefNotFound: ...: make sure that the path to OptiFine that's outputted on the console is actually pointing to the file you downloaded.
• This broke my game!: You can always remove the patch and it's as if it was never there...