Generate custom image placeholders and dummy images online for free. Set exact width, height, and text — perfect for web mockups and development. No signup, works instantly in your browser.
FJ Techtools provides a free image placeholder generator that creates custom placeholder images directly in your browser. Enter your desired width and height in pixels, add optional label text, and click Generate — your placeholder image is ready to download instantly. No signup, no software, no file uploads to a server.
This tool doubles as a dummy image generator for developers and designers who need stand-in images during mockups, prototypes, and testing. Whether you call it a placeholder generator, a dummy image creator, or a placeholder online tool — it does the same job: creates a correctly-sized image to fill a layout slot until real artwork is ready.
Enter the width and height in pixels. Common sizes include 300×250 for banner ads, 1200×630 for Open Graph images, and 800×600 for general content placeholders.
Optionally enter label text that will appear on the dummy image — useful for identifying the image zone in a mockup, for example "Hero Banner" or "Product Photo".
Click Generate Placeholder to preview, then click Download Image to save the PNG file to your device — ready to drop into your project immediately.
Placeholder images and dummy images serve several important purposes in web development and design workflows:
Different use cases call for different placeholder dimensions. The most frequently used sizes when working with a placeholder image generator are 1200×630 for Open Graph and social sharing images, 300×250 for standard banner ads, 728×90 for leaderboard ads, 800×600 for general content images, 400×400 for square product thumbnails, and 1920×1080 for full-width hero banners. Enter any custom dimensions you need — this placeholder generator has no size restrictions.
