WR Image Optimizer (FREE)

🔥 Reduce your RPG Maker MV project size by up to 90%

From 1.3GB → 150MB

Built for Android, browser builds, and image-heavy games.

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💡 What is this?

WR Image Optimizer is a free plugin that enables WebP image loading in RPG Maker MV, allowing your game to load optimized images instead of large PNG files.

• ✅ Loads .webp instead of .png
• ✅ Dramatically reduces file size
• ✅ Improves performance on mobile and web
• ✅ Safe PNG fallback (no risk)

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🚀 Real Results

Tested on a real project:

• 📦 Before: 1.3 GB (PNG)
• ⚡ After: 150 MB (WebP)

👉 ~90% smaller
👉 No noticeable quality loss in-game

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📱 Why use this?

This plugin solves common RPG Maker MV problems:

• ⚡ Slow loading times
• 📉 Large download sizes (especially for web builds)
• 💾 High memory usage on Android
• 🔥 Crashes on mobile devices

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🧠 How it works

img/pictures/MyImage.webp → loaded first
img/pictures/MyImage.png  → fallback

• ✔ No need to rewrite events
• ✔ Fully backwards compatible

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⚠️ Editor Limitation

RPG Maker MV does not support WebP in the editor.

• You must keep PNG files during development
• The editor only displays PNG images
• WebP is used only at runtime via the plugin

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🛠️ Deployment Workflow

During development:

• ✔ Keep both .png and .webp

After deployment:

• ✔ Manually remove or replace PNG files in your final build

👉 Required for maximum size reduction

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⚙️ Converting PNG → WebP (FFmpeg)

Recommended (high quality):

ffmpeg -i input.png -q:v 90 -pix_fmt yuva420p output.webp

• ✔ Preserves transparency
• ✔ Very high quality
• ✔ Ideal for CG and scenes

📂 Convert a folder (Windows)

for %i in (*.png) do ffmpeg -i "%i" -q:v 90 -pix_fmt yuva420p "%~ni.webp"

📁 Convert all subfolders

for /r %i in (*.png) do ffmpeg -i "%i" -q:v 90 -pix_fmt yuva420p "%~dpni.webp"

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🎯 Recommended Usage

Use WebP for:

• CG / scenes
• Backgrounds
• Visual novel content

Keep PNG for:

• Tilesets
• Characters
• UI / system graphics

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🧱 Scope

This plugin only affects:

• img/pictures/

It does NOT modify:

• characters
• tilesets
• UI
• system images

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⚔️ Why this matters

RPG Maker MV projects often become very large due to PNG images, especially in visual novels or image-heavy games.

This plugin directly solves:

• Large project sizes (1GB+ games)
• Slow browser loading
• Poor Android performance
• High memory usage

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❤️ Free Plugin

This plugin is completely free.

• ⭐ Rate it
• 💬 Share your results
• 🔗 Spread the word

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⚠️ Encryption Note

This plugin is designed for standard picture loading and WebP workflows. If you use RPG Maker MV's default image encryption, WebP loading will not work as intended.

For best results, use this plugin with non-encrypted files in img/pictures/.

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💬 Developer Note

Some parts of this page were written with the help of AI to keep the information clear and structured.

The plugin itself is something I actively use in my own projects to optimize Android performance and reduce web build size.

I decided to release it for free because the results were honestly too good not to share.