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Can't place blocks - Scratch project size limit solutions

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💡 Project getting too large? Can’t save your work? Need help with optimization? 🚀 Get Help Now

CO

CodeOptimizer_Pro

Posted on July 23, 2025 • Beginner

💾 Can’t place any more blocks - project won’t save!

I’m working on a game project and suddenly I can’t place any more blocks! Every time I try to add new code, the project won’t save. 😰

This is really frustrating because I’ve put so much work into this project. I don’t want to lose all my progress!

Has anyone else experienced this issue? What can I do to fix it?

Any help would be greatly appreciated! 🙏

PS

ProjectSaver_Expert

Replied 2 hours later • ⭐ Best Answer

Don’t worry @CodeOptimizer_Pro! This is a common issue when projects get too large. Here’s a complete solution guide:

🔍 Understanding the Problem

Scratch has file size limitations to ensure good performance. When your project gets too large, you’ll hit these limits:

flowchart TD A[📁 Large Project] --> B{Check File Size} B -->|> 50MB| C[❌ Can't Save Online] B -->|> 10MB| D[⚠️ Performance Issues] B -->|< 10MB| E[✅ Normal Operation] C --> F[💾 Save to Computer] D --> G[🔧 Optimization Needed] F --> H[📱 Use Offline Editor] G --> I[🎨 Reduce Assets] G --> J[🧹 Clean Code] G --> K[📦 Use Custom Blocks] I --> L[✨ Optimized Project] J --> L K --> L style A fill:#ffebee style C fill:#ffcdd2 style L fill:#e8f5e8

💾 Immediate Solutions

Here are quick fixes to save your work:

1. Save to Computer

First, protect your work by saving locally:

  • Go to File → Save to your computer
  • This creates a .sb3 file you can always reload
  • Your work is now safe even if online saving fails!
2. Use Scratch Desktop

Download and use the offline Scratch editor:

  • Download Scratch Desktop from scratch.mit.edu
  • Open your saved .sb3 file in the desktop app
  • Continue working without online size limits

🛠️ Project Optimization Techniques

Here’s how to reduce your project size:

1. Optimize Images and Sounds

Media files are usually the biggest culprits:

    // Before optimization:
// Large background image: 2MB
// Multiple sound effects: 5MB each
// High-resolution sprites: 1MB each

// After optimization:
// Compressed background: 200KB
// Shorter sound clips: 500KB each
// Optimized sprites: 100KB each

Image Optimization Tips:

  • Use smaller image dimensions (max 480x360 for backgrounds)
  • Convert to PNG format for better compression
  • Remove unnecessary transparency
  • Use solid colors instead of gradients when possible

Sound Optimization Tips:

  • Keep sound clips under 10 seconds
  • Use lower quality settings (22kHz instead of 44kHz)
  • Remove silence at beginning and end
  • Use mono instead of stereo when possible
2. Code Optimization with Custom Blocks

Reduce repetitive code using custom blocks:

    // Instead of repeating this code everywhere:
if <touching [Enemy v]?> then
change [Health v] by [-10]
play sound [hurt v]
set [ghost v] effect to [50]
wait [0.5] seconds
set [ghost v] effect to [0]
end

// Create a custom block:
define take damage (amount)
change [Health v] by (amount)
play sound [hurt v]
set [ghost v] effect to [50]
wait [0.5] seconds
set [ghost v] effect to [0]

// Then use it simply:
take damage [-10]
3. Remove Unused Assets

Clean up your project:

  • Delete unused sprites, costumes, and sounds
  • Remove commented-out code blocks
  • Combine similar sprites when possible
  • Use costume switches instead of multiple sprites

🔧 Advanced Optimization Tools

Use these tools for deeper optimization:

Project JSON Minimizer

This tool can significantly reduce file size:

  1. Save your project as .sb3 file
  2. Visit the Project JSON Minimizer tool online
  3. Upload your .sb3 file
  4. Download the optimized version
  5. Load the optimized file back into Scratch

What it does:

  • Removes unnecessary metadata
  • Compresses project structure
  • Optimizes block arrangements
  • Can reduce file size by 20-50%!

📊 Monitoring Project Size

Keep track of your project size:

    // Create a size monitoring system
when flag clicked
set [Project Size Check v] to [1]
forever
if <(Project Size Check) = [1]> then
// Check sprite count
set [Sprite Count v] to (length of [Sprite List v])

// Check costume count
set [Costume Count v] to (length of [Costume List v])

// Check sound count
set [Sound Count v] to (length of [Sound List v])

// Display warning if too many assets
if <<(Sprite Count) > [20]> or <<(Costume Count) > [50]> or <(Sound Count) > [30]>>> then
say [Warning: Project getting large!] for [2] seconds
end
end
wait [5] seconds
end

🚀 Prevention Tips

Avoid size issues in future projects:

  • Plan ahead: Design with file size in mind
  • Regular cleanup: Remove unused assets weekly
  • Use external tools: Optimize images before importing
  • Modular design: Split large projects into smaller ones
  • Test frequently: Save and test your project regularly

Your project will be running smoothly again in no time! 🎯

CO

CodeOptimizer_Pro

Replied 30 minutes later

@ProjectSaver_Expert This is incredibly helpful! 🎉 I saved my project to my computer first (phew!), then used the JSON minimizer tool you mentioned.

The file size went from 47MB down to 28MB! I was able to upload it again and continue working. The custom blocks tip is also genius - I had so much repeated code.

Thank you so much for saving my project! 🙏

OT

OptimizationTips_Guru

Replied 2 hours later

Great advice everyone! Here’s an additional pro tip for managing large projects:

Project Splitting Strategy:

  • Create a “Main Menu” project that links to other projects
  • Split levels into separate projects
  • Use cloud variables to share data between projects
  • This keeps each project under size limits!
    // In main menu project:
when [Level 1 v] clicked
set [Current Level v] to [1]
open [https://scratch.mit.edu/projects/level1-id/]

// In level project:
when flag clicked
if <(Current Level) = [1]> then
// Load level 1 data
end

This approach lets you create massive games without hitting size limits! 🚀

VB

Vibelf_Community

Pinned Message • Moderator

🚀 Optimize Your Scratch Projects Like a Pro!

Fantastic discussion on project optimization! For those looking to create even more efficient and scalable projects, our community can help you with:

  • 🎨 Advanced asset optimization
  • 🧹 Code refactoring techniques
  • 📊 Performance monitoring
  • 🔧 Custom optimization tools

📚 Related Topics

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