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CSS Layout Testing Images

Generate images at extreme aspect ratios to stress-test responsive CSS layouts.

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Preset sizes

Color themes

💡 For HTML mockups: use the “Copy as data URL” option and paste into <img src="..."> for inline placeholders. For Figma / Sketch designs, download the PNG and drag in.

CSS Testing tips

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For testing image grids: generate images of varied aspect ratios (square, portrait, wide). See if your CSS handles them.

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For testing very tall or wide images: use the custom dimensions to make absurd aspects like 100×1000 or 2000×100.

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Enable "Show diagonals" to visually verify alignment and crops at different sizes.

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Use "Copy as data URL" to inline placeholder image

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When demoing a CMS template, use placeholder image

📱

Social Media Image Templates

Generate correctly-sized placeholders for Instagra

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Back to Placeholder Image Generator