Minecraft Firework Generator

Build the rocket burst by burst. Shapes, colors, the fade on the way out, and as many bursts in one rocket as you want.

Burst 1 of 1
Bursts in (1 of 8)

Several colors means each spark picks one of them, not a blend.

Fades to (0 of 8)

Optional. The sparks change to this color as they die.

The command
/give @s minecraft:firework_rocket[fireworks={flight_duration:1,explosions:[{shape:"large_ball",colors:[I;11743532]}]}]

Paste it into chat or a command block. Java Edition, 1.20.5 and later.

Flight
How long it climbs, which is the gunpowder count. One to three is what you can craft. A command will take more.
Who gets it

One rocket can carry several bursts, and they all go off together. Every burst hurts anything within five blocks of it, so keep back from your own display.

How it works

  • Pick a shape for the burst. Each one is what a different item adds to the star.
  • Click dyes to add the colors it bursts in. Several colors means each spark picks one of them.
  • Add fade colors if you want the sparks to change as they die, then a trail or a twinkle.
  • Add more bursts for a bigger show. They all go off together.
  • Copy the command and paste it into chat. The dye colors here are the firework ones, which differ from the armor colors.

Java Edition, 1.20.5 and later. A burst hurts anything within five blocks, so watch where you stand.

Questions

Why are the colors here not the same as the dye colors elsewhere?
Because the game keeps a separate color for firework stars. Red dye paints leather armor one red and a firework star a slightly different one, and fourteen of the sixteen dyes work like that. The swatches on this page are the firework colors, so what you see is what goes up.
What do several colors on one burst do?
Each spark picks one of them at random. They do not blend, so two colors give you a two-colored burst rather than the color in between.
What is the difference between a burst color and a fade color?
The burst color is what the sparks start as. The fade color is what they change into as they die out. A fade is optional, and it is what makes a firework look like it is cooling off.
What makes each shape?
A plain star is a small ball. A fire charge makes a large ball, a gold nugget makes a star shape, any mob head makes a creeper face and a feather makes a burst. One star can have only one shape.
Do fireworks hurt people?
Yes, if they carry a star. The burst hurts anything within five blocks that is not behind a solid block. One star does up to 7 points, and every extra star adds 2. Stand back from your own display.
What does flight duration change?
How long the rocket climbs before it bursts, which sets how high it goes. Crafting takes one to three gunpowder, and this tool will write a larger number if you type one.
Can one rocket have several bursts?
Yes. Add as many as you like and they all go off at the same moment. That is how the big mixed-shape bursts are made.
Which versions does this work on?
Java Edition 1.20.5 and later. That update changed how items carry their data, and it also changed the shape from a number to a name, so a command from an older generator is refused.