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Convert PNG to 8-bit PNG

Convert PNG images to 8-bit color depth for smaller file size and better compatibility

Click to upload file or drag and drop file here

Maximum file size: 50MB Supported formats: image/png

0 90 100

Quality of the 8-bit conversion process

0 9 9

0 = no compression, 9 = maximum compression

Use adaptive filtering for better compression

Key Facts

Category
Media
Input Types
file, range, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

Easily convert high-bit depth PNG images to 8-bit PNG format to significantly reduce file size while maintaining visual quality and improving cross-platform compatibility.

When to Use

  • •When you need to reduce the file size of web assets for faster page loading.
  • •When preparing images for legacy systems or software that only support 8-bit color palettes.
  • •When you want to optimize PNG images for mobile applications with strict storage constraints.

How It Works

  • •Upload your source PNG file to the converter.
  • •Adjust the quality, compression level, and adaptive filtering settings to suit your needs.
  • •Process the image to generate an optimized 8-bit version.
  • •Download your converted file directly to your device.

Use Cases

Optimizing website icons and UI elements for faster rendering.
Reducing the footprint of game assets in mobile development.
Standardizing image formats for email newsletters and digital marketing materials.

Examples

1. Optimizing Web UI Assets

Web Developer
Background
A developer has a collection of high-resolution PNG icons that are slowing down the website's initial load time.
Problem
The images are too large for optimal web performance.
How to Use
Upload the icons, set the compression level to 9, and enable adaptive filtering.
Example Config
quality: 85, compressionLevel: 9, adaptiveFiltering: true
Outcome
The icons are reduced in size by over 60% without noticeable loss in visual quality, improving site performance.

2. Legacy System Compatibility

Graphic Designer
Background
A designer needs to submit assets to a legacy software platform that only accepts 8-bit PNG images.
Problem
The original source files are 32-bit PNGs and are rejected by the system.
How to Use
Upload the 32-bit PNGs and convert them to 8-bit format using the default settings.
Example Config
quality: 90, compressionLevel: 9, adaptiveFiltering: true
Outcome
The images are successfully converted to 8-bit and are now fully compatible with the legacy software.

Try with Samples

image, png, file
PNG Samples
Sample PNG images in different aspect ratios and resolutions
title token png
image
Web Image Processing Python Samples
Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion
preferred input family image
image
Web Image Processing Go Samples
Web Go image processing examples including image reading/saving, image resizing, and format conversion
preferred input family image
image
Windows Image Processing C++ Samples
Windows C++ image processing examples including reading/saving images, resizing, and format conversion using Windows Imaging Component (WIC)
preferred input family image
image

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FAQ

What is an 8-bit PNG?

An 8-bit PNG uses a color palette of up to 256 colors, which significantly reduces the file size compared to 24-bit or 32-bit images.

Will I lose image quality?

Converting to 8-bit may result in minor color loss, but you can adjust the quality slider to find the best balance between file size and visual fidelity.

What does the compression level do?

The compression level ranges from 0 to 9, where 9 provides the maximum file size reduction.

Is adaptive filtering necessary?

Enabling adaptive filtering helps the encoder choose the best compression strategy for each row of pixels, often resulting in smaller files.

Are there file size limits?

Yes, you can upload PNG files up to 50MB for conversion.

API Documentation

Request Endpoint

POST /en/api/tools/png-to-8bit-png

Request Parameters

Parameter Name Type Required Description
imageFile file (Upload required) Yes -
quality range No Quality of the 8-bit conversion process
compressionLevel range No 0 = no compression, 9 = maximum compression
adaptiveFiltering checkbox No Use adaptive filtering for better compression

File type parameters need to be uploaded first via POST /upload/png-to-8bit-png to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-png-to-8bit-png": {
      "name": "png-to-8bit-png",
      "description": "Convert PNG images to 8-bit color depth for smaller file size and better compatibility",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=png-to-8bit-png",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]