Check If PNG Is Grayscale
Analyze your images to verify if they are purely grayscale. Identify specific color pixels and ensure compliance with grayscale requirements.
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Supports PNG, JPG, WebP, AVIF and more. Process hundreds of files at once.
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Inspection Studio
Image List
| Preview | Image Info | Non-Gray Pixels | Status | Action |
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Review Results
Inspection Settings
Limit the number of detailed pixel reports to avoid freezing the browser.
Analysis Results
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Non-Grayscale Pixels Detected
Why Check for Grayscale?
Ensure your images meet printing requirements or design specifications by verifying they contain no color information.
Pixel-Perfect Accuracy
Our tool scans every single pixel to ensure R = G = B. Even a slight deviation is detected and reported.
Detailed Reporting
See exactly how many pixels are non-grayscale and get a list of their coordinates and color values.
Batch Verification
Upload hundreds of images at once. We verify them all in seconds directly in your browser without uploading to any server.
Common Questions
What is a grayscale image?
A grayscale image is one where the red, green, and blue channels are equal for every pixel (R=G=B). This means the image contains only shades of gray, ranging from black to white.
Why does my black and white image fail the check?
Sometimes, images that look black and white actually contain subtle color information (e.g., R=100, G=101, B=100). Our tool detects these slight imperfections.
Is my data private?
Yes. The verification runs locally in your browser using JavaScript. Your files are never sent to our servers.