Placeholder Image Generator

What is This Tool?

Placeholder Image Generator is a free browser-based tool that lets you generate placeholder images with custom dimensions, colors, and text for design mockups. It processes everything locally in your browser using JavaScript, so your data never leaves your device. No sign-up, no installation, and no server uploads required — just open the tool and start using it immediately.

How to Use This Tool

1. Upload your image using the file picker or drag and drop.
2. Configure output settings such as size, format, or quality level.
3. Preview the result and compare it with the original if available.
4. Download the processed image to your device.

When to Use This Tool

This tool is particularly useful when filling image spaces in web prototypes, creating layout mockups, or generating test images for responsive design. Since it runs entirely in your browser, it works offline after the page loads and keeps your data completely private. Whether you are a developer, designer, student, or professional, this design tool saves time and eliminates the need for desktop software installation.

Tips and Best Practices

• Supported input formats typically include JPEG, PNG, WebP, and GIF — check specific format notes below the tool.
• Larger images produce higher quality output but take longer to process in the browser.
• The original image is never modified — all processing creates a new output file.
• For batch processing, use the tool repeatedly — each image is handled independently.
• Your images are never uploaded to any server — all processing happens on your device.