Placeholder Image Generator

When building website mockups, wireframes, or application prototypes, placeholder images are often needed before final assets are ready. This tool uses the browser Canvas API to generate dummy images locally with your specified dimensions, colors, and overlay text, without uploading anything to a server or relying on external services. Everything happens in your browser, ensuring privacy and instant results.

The tool includes presets for commonly used sizes such as OGP (1200×630), Full HD (1920×1080), Square (500×500), Banner (728×90), and Thumbnail (150×150), letting you set dimensions with a single click. Background and text colors are selected via intuitive color pickers, and when no custom text is provided, the tool automatically displays the image dimensions centered on the image.

Advanced features include pattern overlays (diagonal stripes or dots) to make placeholder areas visually distinct, multiple font families (sans-serif, serif, monospace), vertical text alignment (top, center, bottom), and Retina-ready pixel density options (1x, 2x, 3x) for high-resolution displays. Export in PNG, JPEG, or WebP formats based on your project needs.

Whether you are a front-end developer verifying layouts or a designer preparing client presentations, this tool helps you create professional-looking placeholder assets quickly and simply.