Modify Player Data
With Modify Player Data, server owners can set hidden player fields such as rotation, fall distance and invulnerability through Minecraft's data commands.
What it does
The mod lets the vanilla data commands, including /data and /execute store, write to player data. Fields that the game does not expose through normal play, such as Rotation, fall distance, Invulnerable, PortalCooldown, TicksFrozen and HasVisualFire, can be read and changed this way. Silent is implemented but has little visible effect because of limits in the vanilla client.
Only the server needs the mod, and players connect without installing it. Modify Player Data is released under the GNU Lesser General Public License v3.0 only and is open source, with public links to its source code and issue tracker. It is published for Fabric and NeoForge across 21 release versions, 1.20.1 – 26.3, with snapshot builds also published. Fabric builds do not depend on the Fabric API, and a separate NeoForge line starts at 26.1.
Some tags are left out on purpose. Those that need another command, such as /ride, /waypoint or /xp, are handled by those commands instead. Others are not supported because the author sees no use for them, or because the vanilla client cannot display them.
Key features
Rotation control
The Rotation field of a player can be set with data commands, changing the direction the player faces.
Fall distance editing
The stored fall distance can be changed, which affects how much damage a later landing deals.
Invulnerability flag
The Invulnerable tag can be switched through data commands, so a player takes no damage.
Frozen and fire tags
TicksFrozen and HasVisualFire can be written, letting an administrator freeze a player or show them on fire.
Portal cooldown
The PortalCooldown value can be set, controlling how long before a player can use a portal again.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x4 of 4 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
Use cases
Scripted events
Map makers can freeze or ignite players at chosen moments in adventure maps driven by command blocks.
Server administration
Operators can correct a stuck player state, such as an unwanted fall distance, without restarting the world.
Who it’s for: The mod suits server owners and map makers who already use data commands and want to change fields the game does not expose through normal play. Players on the server need nothing installed.
How it compares
Expanded Data is a Fabric-only, server-side mod released under the MIT License, open source, for 1.20 – 1.21.3. Item & Entity NBT Viewer runs on Fabric and NeoForge for 1.21.6 – 1.21.8, requires the client, and is not open source under the MIT License. Command Runner1 is server required with client optional across four loaders for 1.21 – 26.3, under the MIT License and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Modify Player Data | Fabric and NeoForge | 1.20.1 – 26.3 | Server-side only | 2026-09-16 |
| Expanded Data | Fabric | 1.20 – 1.21.3 | Server-side only | 2024-11-11 |
| Item & Entity NBT Viewer | Fabric and NeoForge | 1.21.6 – 1.21.8 | Client required, server optional | 2025-07-26 |
| Command Runner1 | Fabric, Forge, NeoForge and Quilt | 1.21 – 26.3 | Server required, client optional | 2026-09-19 |
Questions
Does Modify Player Data need to be installed on clients?
Is the Fabric API needed for the Fabric build?
Which versions have NeoForge files?
Why is Silent not very noticeable?
In the catalog
Modify Player Data is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 8,071 mods support Minecraft 26.3.
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What the author says
This mod allows Minecraft's data commands (/data, /execute store, etc.) to modify player data. Feel free to report any bugs, or suggest new features, at the issue tracker.
Official listing
- Modrinth page
- modrinth.com/mod/modify-player-data
- Owner
- eclipseisoffline
- Published
- 2024-02-22
- Updated on Modrinth
- 2026-09-16
- Facts verified
- 2026-10-15
