🌈👩‍💻Overview👨‍💻🌈

• This software reduces the size of Package-Files drastically, very usefull if you have tons of CC
• It removes thumbnails (THUM) and icons (ICON) resources from Package-Files and compresses them
• Thumbnails are safe to remove, the game regenerates them (see image explenation)
• Icons are safe to remove, the game doesn't use them, nor does CC-Magic
• Compressing reduces mod size drastically and lets CC load faster into the game
• DO NOT compress mods (like NRaas and other Script-Mods), only compress CC
• Works only for Package-Files, not for Sims3Pack-Files
• Works only for Windows (did test for Windows 10 & 11), not for Mac, did not test on Linux

🤔 How to install? 🔧

• Just download and open the ".exe-file", you can move it anywhere, nothing else required
• Works only for Windows, not for Mac, did not test on Linux
• The warning message "Unknown Publisher" comes up, cause Microsoft wants me to pay, just so this popup won't appear
• You can just tick the "Always ask before opening this file" and it won't appear anymore
• (Optional) Technical Detail why this happens: You can sign software with a certificate by Microsoft, so windows knows it can be trusted. But this costs $70/year (minimum) and has no other effect than removing the warning.
• If you're unsure if you can trust me, you're free to look at the source code on GitHub
• I added explanations in the code and how to compile it yourself
• (Optional) Technical Detail: It's just around 500 lines of code and parts of it I copied from other very successful Sims 3 Tools. If you're keen in coding, you'll find your way in the codebase pretty easily.

🤔 How do I use it? 🙆‍♀️

Important Notice: You don't have to use it repeatedly. The changes to the files are permanent. Once you finished, you only have to do it for new Package-Files.

1. Click "Browse", choose one or multiple folders that contain Package-Files

• You can enable "Include Subfolders" and it will look at the subfolders as well

2. Check the boxes, choose what it should do with the Package-Files

• "Remove Thumbnails" removes all Thumbnail (THUM) resources in the Package-Files
• Thumbnails are safe to remove, the game regenerates them (see image explenation)
• Some CC (mostly hair and clothes) has custom thumbnails, these will be removed, cause those images tend to be pretty big in file size
• "Remove Icons" removes all Icons (THUM) resources in the Package-Files
• Icons are safe to remove, the game doesn't use them, nor does CC-Magic
• "Compress Files" uses the Sims 3 Recompressor (S3RC) Tool by J. M. Pescado to compress the Package-Files, it's a well known tool
• DO NOT compress mods (like NRaas and other Script-Mods), only compress CC
• Compressing can take pretty long, but it will be worthwhile for your Game/CC-Experience, especially if you have tons of it, like me

3. Reminder: Do you have a backup?

• You'll be reminded to have backups
• You can disable the warning by unchecking "Remind me to have backups"

4. Click "Reduce"

• Now you can make yourself a coffee, some tee or take a bath :D
• Depending on the amount and size of the files, this can take a while (especially if you enabled compressing)
• But trust me, it will be worth it

5. If you click "Stop"

• It will not stop immediately, it will finish the file it currently edits and than stop

⚙️ Technical Details 💡

• You can find the source code on GitHub
• It's published under the GNU General Public License (GPL-3.0)
• Feel free to fork the code and change it any way you like, this source code meant to be public, free and open
• The README-File contains instructions on how to compile the code yourself
• I used Visual Studio 2026 with .NET 10.0 and WinForms API to create the GUI

🕑 Changelog 🔁

06.03.2026 - Version 1.0.1

• No Failure if file is not accessable
• skips if file is not readable or writeable
• shows summary of skipped files at final success and stopped popup messageboxes

⭐ Big thanks to ... 💐

• Sims 3 Easy Extractor & Merger Tools by phantom99 (their project and open source code inspired me to do this)
• Sims 3 Package Interface by Peter L Jones
• Sims 3 Recompressor (S3RC) Tool by J. M. Pescado
• Pixlr.com which I always use for free image editing
• Seasons Coat with Buttons for teens by sweetdevil, which I used for example pictures
• Set of hairstyles Skysims by Agnelid, which I used for example pictures
• AND to this awesome and still alive community of simmers ^^