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Placeholder Image Generator | Free Online Tool

April 18, 20264 min read

A placeholder image is a temp graphic that fills space in a layout before real content is ready. Designers use them in wireframes, mockups, and prototypes to mark where final images will go.

Our free Placeholder Image Generator is a dummy image generator that creates custom images with any size, color, and text. No signup — runs in your browser.

How to generate placeholder images

Grid of placeholder images in common web sizes like 300x250, 728x90, and 1200x630
Grid of placeholder images in common web sizes like 300x250, 728x90, and 1200x630
  1. Set the size — Enter width and height in pixels, or pick a preset (300x250, 728x90, 1200x630).
  2. Choose colors — Pick background and text colors with hex codes or the picker.
  3. Add text — Type custom text, or leave blank to show the dimensions.
  4. Pick a format — Download as PNG, JPG, or SVG. Copy the URL to embed.

Need hex values? Our Color Picker grabs colors from any image.

Common placeholder image sizes

Each project needs its own sizes. Here are the most used:

Website wireframe mockup showing placeholder images in header, sidebar, product grid, and profile spots
Website wireframe mockup showing placeholder images in header, sidebar, product grid, and profile spots
Use CaseSizeRatio
Social media preview1200x6301.91:1
Blog hero banner1200x67516:9
Profile photo400x4001:1
Product thumbnail600x6001:1
Banner ad (leaderboard)728x908:1
Medium rectangle ad300x2506:5
App store screenshot1290x2796~9:19.5

For the full list, check our social media image sizes guide. Building app store assets? See App Store screenshot sizes for current specs.

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Using placeholder images in code

Add a photo placeholder image right in HTML or CSS with a URL. Many devs use services like placehold.co for quick builds:

<img src="https://placehold.co/600x400" alt="Placeholder" />
Developer workspace with code editor and browser preview showing placeholder images in a webpage
Developer workspace with code editor and browser preview showing placeholder images in a webpage

You can also set a placeholder image CSS background:

.hero {
  background-image: url('https://placehold.co/1200x630/222/fff');
  background-size: cover;
}

When your real images are ready, swap the URLs. Need to resize images first? Our Image Resizer handles that for free.

Profile and headshot placeholder images

A profile placeholder image is a default avatar shown when a user hasn't uploaded a photo — sometimes called a placeholder image person silhouette. The classic gray shape works, but you can make branded ones with custom colors and initials.

Profile placeholder image examples showing generic avatars and headshot placeholders in various styles
Profile placeholder image examples showing generic avatars and headshot placeholders in various styles

For headshot placeholder images, use a 1:1 ratio (200x200 or 400x400). Match your app's colors so the placeholder feels like part of the design.

Need to grab colors from a live design? The Color Palette Extractor pulls the main shades from any image.

Placeholder image tips for designers

  • Match your grid. Set sizes to your actual layout columns so spacing stays right.
  • Use real aspect ratios. A 16:9 placeholder in a 4:3 slot hides layout bugs you'll find later.
  • Label them. Add text like "Hero Image" or use an image placeholder icon so your team knows what goes where.
  • Test at all sizes. Drop placeholders at many widths to catch breakpoints early. ScreenSnap Pro makes it easy to capture and annotate screenshots of layouts at each viewport size.

Frequently Asked Questions

Author
Morgan

Morgan

Indie Developer

Building cool apps. Sharing learnings along the way.

@m_0_r_g_a_n_
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