Minecraft /execute builder

Commands

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Build /execute step by step: choose the executor, position, conditions, and final action. Read a plain-English explanation, or paste an existing command to break it down and find why it does nothing.

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Steps in order

Step 1 Step 1 arguments

Next — for each player. If there are multiple targets, everything below will run once per target.
Step 2 Step 2 arguments

Next — where the executor is located: the same coordinates, rotation, and dimension. The executor does not change.
Step 3 Step 3 arguments

Next — only if there is a minecraft:diamond_block at ~ ~-1 ~.
Step 4 Step 4 arguments

Up to 8 steps. Each subsequent step runs on what the previous one modified — order matters.

What to execute

After run — the command without a slash

Empty — the command only checks conditions. Colored text for run will be collected /tellraw effects — /effect, particles — /particle.

Result

Example

/execute as @a at @s if block ~ ~-1 ~ minecraft:diamond_block run effect give @s minecraft:speed 5 1 true

What the command does

as @aNext — for each player. If there are multiple targets, everything below will run once per target.
at @sNext — where the executor is located: the same coordinates, rotation, and dimension. The executor does not change.
if block ~ ~-1 ~ minecraft:diamond_blockNext — only if there is a minecraft:diamond_block at ~ ~-1 ~.
run effect give @s minecraft:speed 5 1 trueExecutes: /effect give @s minecraft:speed 5 1 true

Already have a command? Paste it to fill in the form

How to use the result

In chat
With operator permissions or 'Allow cheats' in single-player. Chat can hold 256 characters — only command blocks can be longer.
Using a command block
For continuous checks, set the command block to Repeat and Always Active. Without a run clause, a comparator can read whether the condition succeeded.
In the data pack function
A line without '/' — a ready function string. A data pack with commands will run it on a timer or upon entry.

What to know about /execute

as changes 'who', at changes 'where'. as @a without at @s will execute the command on behalf of each player, but at the command block's location. Both are usually needed: as @a at @s.
The order of steps is important. as @a at @s — each player at their own location. at @s as @a — all players, but at the executor's location.
Several goals — multiple runs. as @e[type=cow] will execute everything below once per cow.
A condition without 'run' — a check. Command checks whether a condition is met, while a command block sends a signal to a comparator.
store outputs the result of run. For example, how many items were found clear: store result score @s found run clear @s diamond 0.

What @a, @p and their arguments mean — in target selectors, score for if score will be set /scoreboard display. Information about command blocks — in wiki.

Frequently asked questions

Why doesn't execute as @a work with coordinates ~?

as changes only the player executing the command, the location remains unchanged — either the command block's location or the player who entered the command. To make ~ ~ ~ apply to each player, after as, use at @s.

What's the difference between 'as' and 'at' in the execute command?

as sets who executes the command — who will be @s. at moves the point, rotation, and position to the target location, but does not change the executor. They are often used together: as @a at @s.

How to check the block below the player with execute?

Steps as @a at @s if block ~ ~-1 ~ and id of the block, and at the end run with the required command. ~ ~-1 ~ — the block directly below the player's feet.