Scratch projects save assets using MD5 hashes as filenames (e.g., b7a3...wav ). If you manually renamed your costumes to text like cat.png or jump.wav , the project.json file will no longer be able to find them. Ensure your asset filenames match the exact string IDs written inside your JSON code. Alternative: Using Online Converters
Go to the Scratch MIT website or open the Scratch Desktop application. Click > Load from your computer . zip to sb3 extra quality
Set the Compression Method to or Standard/Normal . Avoid using specialized ultra-compression methods like LZMA or PPMd, as the Scratch parser cannot read them. Step 4: Convert the Extension to .SB3 Scratch projects save assets using MD5 hashes as
Zip to SB3 Extra Quality: A Comprehensive Guide to High-Resolution Scratch Project Conversion Alternative: Using Online Converters Go to the Scratch
Right-click and select (on Windows) or "Compress" (on macOS).
Select all the individual files and folders inside your project directory.