Dummy Image Generator png

What this tool does

Layout work usually starts before the real images exist. A placeholder with exact dimensions lets you see card lists, thumbnails, and banner slots at their true proportions. External placeholder services can do this, but they depend on the network and every image breaks when the service goes away.

This tool draws the image with the browser canvas instead. Set width, height, background color, and a label, then download the result as a PNG. Nothing is uploaded and no external service is called.

It is also handy for testing upload features. Verifying size and dimension limits requires files with specific properties, and you can produce exactly what you need on the spot.

When to use it

Use it to fill image slots during markup work, to check thumbnail and banner proportions, to test size validation on an upload form, or to produce example images for documentation and slides.

Input and output examples

Notes and limitations

Generated images are for testing. Check before release that none remain in production screens. Very large dimensions consume browser memory and slow generation down.

Frequently asked questions