CookieJar
CookieJar lets a player view, edit, send and save the cookie data that a Minecraft client stores, through a hotkey-driven editor.
What it does
Cookies are small data entries that the game can transfer between a client and a server. CookieJar provides a developer tool view for reading them, along with options to add, remove, edit and send cookies. A cookie's data string and byte array can be changed directly, and cookie files can be imported or exported, so a set of entries can be saved and loaded again later.
The mod also has an option to ignore incoming cookie transfer packets, and it can simulate a transfer packet. Simulation works in singleplayer, so testing does not require two servers. A hotkey opens the cookie editor controls menu during a singleplayer or multiplayer session. The mod is released under the GNU Lesser General Public License v3.0 only and is open source. Its source code and issue tracker are public. Fabric API is required, and the mod is published for Fabric alone across 19 release versions, 1.20.5 – 26.3.
Key features
Cookie viewer for developers
A developer tool view shows the cookies stored by the client so their contents can be inspected.
Add, remove and edit cookies
Entries can be created, deleted and changed, including the data string and byte array of each cookie.
Import and export files
Cookie sets can be written to a file and read back in, so test data can be reused across sessions.
Packet handling options
Incoming cookie transfer packets can be ignored, and a transfer packet can be simulated in singleplayer.
Hotkey editor menu
A keybinding opens the cookie editor controls menu in singleplayer and multiplayer sessions.
Gallery
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.x2 of 2 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Who it’s for: The mod suits Minecraft developers who work with cookie transfer packets and server developers who want to view, edit or save cookies. Players who do not work with cookies have little use for it.
Questions
Does CookieJar need Fabric API?
Does CookieJar have to be installed on the server?
Can cookies be tested without a second server?
Which versions does CookieJar support?
In the catalog
CookieJar is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.
Similar mods
What the author says
This mod adds allows server developers to view, edit, and save the new cookies from 1.20.5. Add a hotkey to the cookie editor in the controls menu, then press that key in a singleplayer or multiplayer session.
Official listing
- Modrinth page
- modrinth.com/mod/cookiejar
- Owner
- Tisawesomeness
- Published
- 2024-02-05
- Updated on Modrinth
- 2026-09-17
- Facts verified
- 2026-10-15