Minecraft 25w02a Update - What's New
The first snapshot of 2025 and the start of the Spring to Life cycle. It added warm and cold pigs, wildflowers, leaf litter and falling leaf particles, and made lodestones cheaper to craft.
Overview
Minecraft 25w02a is a weekly development snapshot for Minecraft: Java Edition, published on January 8, 2025. Snapshots are Mojang's weekly previews of in-progress features (development week 2 of 2025), shipped early so the community can test and report problems before anything is finalized. This one logs 9 changes you can try in a throwaway test world.
The work in this update spans new features, changes, and technical. On the new features side it brings Warm and cold pig variants, picked by the biome they spawn in and Wildflowers in birch forests and meadows, up to four in one block.
This build is part of the development cycle leading to 1.21.5 (the Spring to Life drop). Treat it as a preview rather than a destination: features can change, be renamed, or be cut entirely before they reach the stable release, so it is meant for testing and feedback, not for your main world or a live server.
Changes
#New Features(4)
- Warm and cold pig variants, picked by the biome they spawn in
- Wildflowers in birch forests and meadows, up to four in one block
- Leaf litter in forests, dark forests and wooded badlands, made by smelting leaves
- Falling leaf particles on most leaf blocks
#Changes(3)
- Lodestones crafted with an iron ingot and found in ruined portals
- Farm animals can spawn in badlands
- Hardcore worlds can be uploaded to Realms
#Technical(2)
- Data pack version 62 and resource pack version 47
- Text components in commands are written in SNBT instead of JSON
Server Admin Migration Guide
- Snapshot only, not for a live server: keep production on the current release
- Commands that build text components in JSON need to move to the SNBT form
Known Issues
- Development snapshot, features can still change before 1.21.5
What This Means
For players
Snapshots are opt-in through the official launcher. Always make a copy of any world before opening it in 25w02a, because development builds can corrupt saves and there is no guarantee the world will open in a later version. Use a fresh test world to try the new content safely.
For server admins
Do not run 25w02a on a public server. Snapshots are unsupported by server software and most plugins. Spin up a private staging instance, confirm your plugins load, and report regressions while there is still time to fix them before release.
Background & Context
- Snapshots ship roughly once a week during active development and are enabled through the "Latest snapshot" toggle in the official launcher.
- The content here was being developed toward 1.21.5 (the Spring to Life drop); individual features may have been adjusted, renamed, or removed before that version shipped.
- Always keep a backup of important worlds before changing versions; the Astroworld versions database tracks client and server compatibility for 25w02a.
Frequently Asked Questions
When was Minecraft 25w02a released?
Minecraft 25w02a was released on January 8, 2025 as a weekly development snapshot for Minecraft: Java Edition.
What is new in 25w02a?
The first snapshot of 2025 and the start of the Spring to Life cycle. It added warm and cold pigs, wildflowers, leaf litter and falling leaf particles, and made lodestones cheaper to craft. Notable entries include: Warm and cold pig variants, picked by the biome they spawn in; Wildflowers in birch forests and meadows, up to four in one block; Leaf litter in forests, dark forests and wooded badlands, made by smelting leaves. In total it documents 9 changes across 3 categories.
Should I use 25w02a on my main world?
No. 25w02a is a weekly development snapshot meant for testing. Keep your main world on the latest stable release and only open a backup copy in a separate test world to try the new content.
Can I run 25w02a on a Minecraft server?
It is not recommended for a public server. Snapshot only, not for a live server: keep production on the current release. Use a private staging instance to test plugins and mods, not to host players.
Which Minecraft version is 25w02a a preview of?
25w02a is part of the development cycle for 1.21.5 (the Spring to Life drop). Features shown here are still in progress and may change before the final release.
Are there known issues in 25w02a?
Yes. Documented issues for this build include: Development snapshot, features can still change before 1.21.5. Development builds are expected to have rough edges that get fixed before release.
Looking for version compatibility info?
Check client and server version details on our versions database.