<svg xmlns="http://www.w3.org/2000/svg" width="640" height="360" viewBox="0 0 640 360"> <rect width="640" height="360" fill="#667eea"/> <text x="50%" y="50%" font-family="-apple-system,system-ui,sans-serif" font-size="45" font-weight="600" fill="#ffffff" text-anchor="middle" dominant-baseline="central">640×360</text> </svg>
About SVG Placeholder Generator
During layout work the real images often are not ready yet, so you need a precisely-sized placeholder that can label its own resolution. This tool builds SVG placeholders locally in your browser: set the width, height, background color, text color, and caption, and it assembles vector SVG code you can inline into HTML or turn into a Data URI. Being vector, it stays sharp at any scale, and being tiny, it saves more bandwidth than bitmap placeholders. Everything is generated on your device with no calls to any external placeholder service. Tip: Bookmark this tool for quick access during your web development work. All processing happens locally in your browser with no installation required.
How to Use
- Open the SVG Placeholder Generator tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
Use Cases
- Layout blocking — Drop exactly-sized placeholder blocks into cards, carousels, or grids to tune a responsive layout first.
- Lazy-load base — Provide a lightweight SVG first paint for lazy-loaded images to stop layout shift before they arrive.
- Design annotation — Print dimensions like 800x600 right on the placeholder to align slice specs with designers.
- Offline ready — Replace placeholder links that depend on a third-party domain so intranet or offline pages still render.
- Inline Data URI — Convert the placeholder to a Data URI inside an img or CSS to save one HTTP request.
- Storybook dummy — Generate placeholder SVGs for component stories so every story renders without missing-image icons.
- Responsive test grid — Create placeholders at multiple aspect ratios to verify a CSS grid layout across viewports.
FAQ
Why SVG instead of a PNG placeholder?
SVG is vector, staying crisp and undistorted at any size, and a few hundred bytes of code can describe a whole image — far smaller than an equivalent PNG, which is ideal for placeholders.
How do I use the generated SVG on a page?
Three ways: inline the SVG code directly in HTML, save it as a .svg file referenced by an img, or convert it to a Data URI used in src or a CSS background.
Does the caption text scale automatically?
Font size can be set relative to the width and height and centered with text-anchor. If your container is responsive, give the SVG a width of 100% so it scales proportionally.
Can I batch-generate several sizes?
Generate them one size at a time, commonly for multi-resolution placeholders in a responsive srcset. For random colored blocks, change the background color and generate again.
Does SVG in a Data URI need escaping?
Yes. When placed directly in CSS, characters like # must be URL-encoded, or wrap it in base64, or some browsers fail to parse it. This tool outputs a ready-to-use form.
Any browser compatibility requirements?
This tool works in all modern browsers (Chrome, Firefox, Edge, Safari). No plugins or extensions required.
Can I use it offline?
After initial load, most features work offline. The core logic runs entirely in your browser with no network dependency.
Comments
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