Image/Color Placeholder Generator
Free online placeholder image generator. Create custom colored placeholder images with text overlay in SVG or PNG format for mockups, wireframes, and prototyping.
What Is a Placeholder Image Generator?
A placeholder image generator creates simple colored images with custom dimensions and optional text overlay. These images are commonly used during web development and design to represent content that hasn't been finalized yet—such as hero banners, thumbnails, avatars, or product images. Instead of relying on external placeholder services that may go offline, this tool generates images entirely in your browser using SVG markup or the Canvas API, giving you full control over dimensions, colors, and text without any network requests.
How to Use the Placeholder Image Generator
- Enter the desired width and height in pixels for your placeholder image.
- Choose a background color using the color picker or by typing a hex value directly.
- Set the text color to contrast with your background for readability.
- Optionally customize the overlay text—by default it shows the image dimensions (e.g. '600x400').
- Select the output format: SVG for scalable vector graphics, PNG for raster images, or Data URL for inline embedding.
- Preview the generated image below the controls. Use 'Copy Data URL' to paste it directly into your HTML or CSS, or click 'Download' to save the file.
Common Use Cases
- Web Development Prototyping — Quickly fill image slots in your HTML/CSS layouts with correctly sized placeholders while building page structures before real assets are available.
- Wireframing & Mockups — Create placeholder images with exact dimensions for design mockups and wireframes to accurately represent the final layout.
- Documentation & Tutorials — Generate simple example images for documentation, README files, or coding tutorials without needing external image hosting.
- Email Template Design — Use data URL placeholders in email templates during development to test layouts without relying on hosted images that may be blocked.
FAQ
What is the maximum image size I can generate?
The tool supports dimensions up to 4096×4096 pixels. SVG output remains lightweight at any size since it's vector-based, while very large PNG images may take a moment to generate in your browser.
What's the difference between SVG, PNG, and Data URL output?
SVG produces scalable vector markup that looks crisp at any zoom level and has a tiny file size. PNG creates a raster bitmap image suitable for contexts that don't support SVG. Data URL outputs a base64-encoded PNG string you can paste directly into img src attributes or CSS background-image properties.
Can I use these images in production?
While the images are fully functional, they are primarily designed for development and prototyping. For production use, you would typically replace them with actual content images. However, they work perfectly as fallback images or default avatars.
Does this tool make any network requests?
No. All image generation happens entirely in your browser using SVG markup or the HTML Canvas API. No data is sent to any server, making it completely private and usable offline.