Placeholder Image Generator: Create Custom Dummy Images Online
Placeholder images are essential in web development and design workflows. Whether you are building a website prototype, creating a mockup for a client presentation, or testing a responsive layout, you need images of specific dimensions to fill the gaps before final assets are ready. Our free placeholder image generator lets you create custom dummy images instantly, right in your browser.
This tool generates images using the HTML5 Canvas API, which means everything happens client-side with zero server interaction. Your images are never uploaded or stored anywhere. Simply set the width and height in pixels, choose your background and text colors, add optional custom text, and download the resulting image in PNG or JPEG format.
The generator includes popular preset sizes for social media platforms like Facebook Cover (820x312), Instagram Post (1080x1080), Twitter Header (1500x500), and YouTube Thumbnail (1280x720). These presets save you time by instantly filling in the correct dimensions used by major platforms, ensuring your designs will fit perfectly when you swap in final images.
For developers, the copy-as-base64 feature is particularly useful. Instead of downloading a file, you can copy the entire image as a data URL and paste it directly into your HTML, CSS, or JavaScript code. This is perfect for quick prototyping, email templates, or any situation where you need an inline image without an external file reference.
The font size can be set to auto mode, which intelligently calculates the optimal text size based on the image dimensions and text length, or you can manually specify an exact pixel size. The default text shows the image dimensions (e.g., "800x400"), making it easy to identify placeholder images in your layouts at a glance.
Whether you are a frontend developer, UI/UX designer, project manager, or content creator, this placeholder image generator streamlines your workflow by eliminating the need for external placeholder image services. Everything runs locally in your browser, ensuring privacy and instant results with no rate limits or API dependencies.