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Image Grayscale Converter

Convert images to black and white with various modes like grayscale, threshold, and sepia

Click to upload file or drag and drop file here

Maximum file size: 10MB Supported formats: image/jpeg, image/png, image/webp, image/gif, image/bmp, image/tiff

Key Facts

Category
Design
Input Types
file, select, number
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

Easily transform your color images into professional black and white, vintage, or high-contrast styles with our Image Grayscale Converter. This tool supports multiple conversion modes, allowing you to achieve the perfect monochrome look for your design projects or artistic needs.

When to Use

  • •When you need to remove color distractions from a photograph to focus on composition.
  • •When creating vintage-style assets using the sepia or high-contrast modes.
  • •When preparing images for print or documents that require monochrome formatting.

How It Works

  • •Upload your image file in formats like JPEG, PNG, or WebP.
  • •Select your preferred conversion mode, such as Grayscale, Threshold, or Sepia.
  • •Adjust optional parameters like the threshold value or sepia intensity for precise control.
  • •Download your processed image instantly.

Use Cases

Converting modern photos into classic vintage-style portraits.
Simplifying complex diagrams or charts into high-contrast black and white for presentations.
Creating artistic duotone or monochrome assets for web design.

Examples

1. Vintage Photo Restoration

Graphic Designer
Background
A designer needs to create a nostalgic, old-fashioned look for a brand's social media campaign.
Problem
The original photos are vibrant and modern, clashing with the brand's vintage aesthetic.
How to Use
Upload the photo, select 'Sepia' mode, and set the intensity to 75.
Example Config
mode: sepia, sepiaIntensity: 75
Outcome
The image is converted into a warm, aged-looking sepia photograph ready for the campaign.

2. High-Contrast Document Preparation

Technical Writer
Background
A writer needs to include a screenshot in a technical manual that will be printed in black and white.
Problem
The original screenshot has too many subtle colors, making it difficult to read when printed in monochrome.
How to Use
Upload the screenshot, select 'Threshold' mode, and adjust the threshold value to 150 for clarity.
Example Config
mode: threshold, threshold: 150
Outcome
The image is converted to a sharp, high-contrast black and white graphic that is perfectly legible in print.

Try with Samples

image, png, jpg
Web Image Processing Python Samples
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Web Image Processing Rust Samples
Web Rust image processing examples including image read/save, scaling, and format conversion
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macOS Image Processing Objective-C Samples
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FAQ

What image formats are supported?

The tool supports JPEG, PNG, WebP, GIF, BMP, and TIFF files.

Can I control the intensity of the sepia effect?

Yes, you can adjust the sepia intensity from 0 to 100 to achieve your desired vintage look.

What is the difference between Grayscale and Threshold?

Grayscale converts the image into a range of gray tones, while Threshold creates a high-contrast image consisting only of pure black and white pixels.

Is there a file size limit?

Yes, the maximum file size for uploads is 10MB.

Does this tool store my images?

No, all image processing is performed directly, and your files are not stored on our servers.

API Documentation

Request Endpoint

POST /en/api/tools/image-grayscale

Request Parameters

Parameter Name Type Required Description
imageFile file (Upload required) Yes -
mode select Yes -
threshold number No -
sepiaIntensity number No -

File type parameters need to be uploaded first via POST /upload/image-grayscale 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-image-grayscale": {
      "name": "image-grayscale",
      "description": "Convert images to black and white with various modes like grayscale, threshold, and sepia",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=image-grayscale",
      "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]