Block Replacer
by Hreggi5
Block Replacer swaps blocks around the player as they walk, using a simple in-game menu opened with the K key.
What it does
Players choose which block to replace and what it should become, then set a radius. Blocks within that radius change in real time as the player moves through the world, with no commands needed. The configuration also tracks whether the system is enabled and keeps the last settings chosen, so the same setup is ready after a restart.
Converting sand into gold blocks along a beach or grass into stone for paths are typical uses. The mod is meant for experimentation, building and playful changes to a world. It is a Forge mod for 1.20.1, and the environment is client and server, so the server and every player need it. The license is MIT, and the code is not open source.
Key features
Real-time block replacement
Blocks inside the chosen radius change the moment the player walks near them, instead of after a command runs.
In-game menu on K
A simple graphical menu opened with the K key selects the source block, the replacement block and the radius.
Radius effect
The radius setting controls how far around the player the transformation reaches, letting a single pass cover a whole area.
Remembered settings
The last block choices, radius and enabled state are kept, so the setup returns the next time the player plays.
Command-free operation
Everything is set through the menu, so no command typing is needed to start or stop the replacements.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Beach conversion
Sand along a shoreline can be turned into gold blocks while the player walks the beach.
Path creation
Grass or stone patches can be converted into paths, marking routes across a build or landscape.
Block experiments
Different source and target blocks can be tried in a test world to see how terrain looks when transformed.
Who it’s for: Players who enjoy building and experimenting with terrain, and server owners who want a playful tool for transforming parts of the world on a Forge server for 1.20.1.
Questions
Does Block Replacer need to be installed on the server?
Which Minecraft versions does Block Replacer support?
How does a player open the replacement menu?
In the catalog
Block Replacer is one of 7,555 Cursed mods on ModsFinder, and one of 3,426 Cursed mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from Hreggi5
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What the author says
BlockReplacerMod lets you dynamically replace blocks around the player while playing. Using a simple in-game menu (press K), you can choose: - Which block to replace - What to replace it with - The radius of the effect - Whether the system is enabled
Official listing
- Modrinth page
- modrinth.com/mod/block-replaceer
- Owner
- Hreggi5
- Published
- 2026-04-30
- Updated on Modrinth
- 2026-04-30
- Facts verified
- 2026-10-15