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Batch method - Converting multiple images to 8-Bit PNG

BMM Archive · July 16, 2026

Preserved forum archive. This topic stores the original first post and locally mirrored RPG Maker Web attachments when available. It is posted by the BMMPlay archive account, not by the original creator.

Original Source

  • Original title: Batch method - Converting multiple images to 8-Bit PNG
  • Original author: Thanatos
  • Original date: October 5, 2019
  • Source thread: https://forums.rpgmakerweb.com/threads/batch-method-converting-multiple-images-to-8-bit-png.113948/
  • Source forum path: Game Development Engines > RPG Maker Tutorials > Non-Maker Specific Tutorials

Summary

FS-PR0.png​ --- Introduction:​Learn how to convert batch graphics for use in Rm2k/2k3, Game Maker (Old Version), MMFusion (Old Version) and other engines that use 8-Bit graphics. An example is the images in this topic, originally the size of 378 Kb (24/32 bits), now the size of 120 Kb (8 bits).

Archived First Post


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Introduction:
Learn how to convert batch graphics for use in Rm2k/2k3, Game Maker (Old Version), MMFusion (Old Version) and other engines that use 8-Bit graphics.

An example is the images in this topic, originally the size of 378 Kb (24/32 bits), now the size of 120 Kb (8 bits).

---

Tutorial:

Downloading FastStone PhotoResizer.
Alert: If you are not the administrator of your machine download the portable version.

Browse or drag all images into the software.

FS-PR1.png


Now select in "Output Format" the PNG option:

FS-PR2.png


Click on "Settings", a window will appear, just change the "Colors" field to 256.

FS-PR3.png


Turn on the "Output Folder" option and set a folder to store the converted graphics.
Do not do this in the same folder, you may damage the original graphics.

Alert:
If you are running Windows Vista (or higher) and need to use MSPaint to do any editing, the image will be converted 24 or 32-bit again..

The required settings have already been applied:

FS-PR4.png


Now to convert just hit the "Convert" button and wait for the progress.

---

Checking the result:

Go to the output folder, right click on any image and select "Properties":

FS-PR5.png


Click on "Details", the Bit Intensity line should be number 8.
If it's 24 or 32, that's why you made a mistake converting.

FS-PR6.png



EXTRA:
Keeping the tree structure of folders:

Browse the software to the project folder, select "CTRL" only the folders with graphics.
Now press the Add button:

FS-PR7.png


After conversion, in the output folder you will find a copy of all graphic folders:

FS-PR8.png

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#rpg-maker-archive#generic-tutorials

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