Convert PNG to Raw Pixel Buffer

Export PNG images as raw pixel buffer files for development workflows and low-level image processing.

Related Tags
Image 282 PNG 40 Binary 24 Pixel 9

Write the decoded pixels from a PNG image into a headerless raw pixel buffer file. This output is useful for render pipelines, shaders, custom imaging code, and tools that expect width, height, channel count, and bit depth to be supplied separately. It does not generate a photographic camera RAW format such as DNG, CR2, NEF, or ARW.

Click to upload file or drag and drop file here

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

Key Facts

Category
Images, Audio & Video
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

Convert PNG images into headerless raw pixel buffer files containing decoded pixel data. This tool is designed for graphics developers, render pipelines, and custom shaders that require direct access to raw pixel values—with options for 8-bit or 16-bit depth and premultiplied alpha—without parsing image headers.

When to Use

  • •When loading image textures directly into GPU memory or custom graphics shaders without using standard image decoding libraries.
  • •When developing low-level image processing algorithms that require raw, uncompressed pixel arrays.
  • •When preparing image assets for embedded systems or custom hardware displays that only accept raw binary pixel buffers.

How It Works

  • •Upload a PNG image file from your local device.
  • •Select the desired bit depth (8-bit or 16-bit per channel) and choose whether to apply premultiplied alpha.
  • •Click convert to decode the PNG and write the raw, headerless pixel buffer directly to a downloadable binary file.

Use Cases

Generating raw texture assets for custom game engines and WebGL shader pipelines.
Preparing image data for microcontrollers and embedded screens that lack PNG decoders.
Feeding raw pixel arrays into custom C++ or Rust image processing libraries.

Examples

1. Exporting Game Textures for WebGL Shaders

Graphics Programmer
Background
A graphics programmer is writing a custom WebGL renderer and needs to load texture data directly into a GPU buffer without the overhead of client-side PNG decoding.
Problem
Needs a clean, headerless binary stream of RGBA pixels from a UI sprite sheet.
How to Use
Upload the sprite sheet PNG, select '8-bit per channel', check 'Premultiplied Alpha', and download the raw binary file.
Example Config
Bit Depth: 8-bit, Premultiplied Alpha: Enabled
Outcome
Obtained a raw binary file containing premultiplied RGBA pixel values ready to be loaded directly via WebGL's texImage2D.

2. Preparing UI Assets for an Embedded Display

Firmware Engineer
Background
An engineer is developing firmware for an STM32 microcontroller connected to a small SPI display that only accepts raw 16-bit color data.
Problem
The microcontroller lacks the memory and processing power to run a PNG decoding library.
How to Use
Upload the interface icon PNG, select '16-bit per channel' bit depth, and convert the file.
Example Config
Bit Depth: 16-bit, Premultiplied Alpha: Disabled
Outcome
Generates a raw 16-bit pixel buffer file that can be flashed directly into the microcontroller's read-only memory.

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
Android Image Processing Java Samples
Android Java image processing examples including reading/saving images, scaling, and format conversion
preferred input family image
image

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FAQ

Does this tool generate camera RAW formats like DNG or CR2?

No, it outputs a headerless binary buffer of raw pixel data (RGBA/RGB values), not a photographic camera RAW file.

What bit depths are supported for the output buffer?

You can choose between 8-bit and 16-bit per channel for the exported pixel data.

What does the premultiplied alpha option do?

It multiplies the RGB color channels by the alpha channel value during the conversion process.

Does the output file contain width and height metadata?

No, the output is a headerless binary file containing only the raw pixel bytes; you must track the dimensions separately.

What is the maximum file size I can upload?

The tool supports PNG image files up to 50 MB in size.

API Documentation

Request Endpoint

POST /en/api/tools/png-to-raw

Request Parameters

Parameter Name Type Required Description
imageFile file (Upload required) Yes -
bitDepth select No -
premultiplied checkbox No -

File type parameters need to be uploaded first via POST /upload/png-to-raw 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-raw": {
      "name": "png-to-raw",
      "description": "Export PNG images as raw pixel buffer files for development workflows and low-level image processing.",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=png-to-raw",
      "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]