Placeholder Image Generator

Create custom placeholder images with custom dimensions, colors, text, and formats. Perfect for wireframes, mockups, prototypes, and testing. Generate PNG, JPEG, SVG, or WebP images instantly.

Preview

Features

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Multiple Formats

Generate placeholder images in PNG, JPEG, SVG, and WebP formats. Each format is optimized for different use cases, from wireframes to production mockups.

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Custom Colors & Text

Choose custom background and text colors with full color picker support. Add custom text or use automatic dimension labels like "800x600".

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Common Size Presets

Quickly generate placeholders for social media banners, thumbnails, avatars, HD displays, and more with one-click presets.

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Instant & Private

Images are generated entirely in your browser using Canvas API. Nothing is uploaded to any server. Download or copy as data URI instantly.

About Placeholder Images

Placeholder images are essential tools in web development, design, and prototyping. They allow designers and developers to visualize layouts, test responsive behavior, and create mockups before final images are available. A good placeholder image clearly indicates its dimensions, fits the design context, and can be quickly generated in various sizes and formats.

Why Use a Placeholder Image Generator?

While there are online placeholder services that provide images via URL (like placehold.it or placeholder.com), generating your own placeholder images gives you complete control over dimensions, colors, text, and format. You can match your brand colors, add custom labels, export in modern formats like WebP, and work entirely offline. This tool uses the HTML Canvas API to generate images directly in your browser—no external dependencies, no network requests, and no privacy concerns.

Common Use Cases

Placeholder images are used in a wide range of scenarios. Designers use them in wireframes and mockups to show where images will appear in a layout. Developers use them to test responsive image behavior, lazy loading, and content loading states. Technical writers use them in documentation to illustrate image placement. Product managers use them in prototypes to demonstrate features before final assets are created. They're also invaluable for creating dummy content in content management systems, testing image galleries, and demonstrating layouts to clients.

Understanding Image Formats

This tool supports four popular image formats. PNG (Portable Network Graphics) offers lossless compression and transparency support, making it ideal for graphics with sharp edges and text. JPEG offers lossy compression with smaller file sizes, best for photographic content or when file size matters more than perfect quality. SVG (Scalable Vector Graphics) is a vector format that scales to any size without quality loss, perfect for simple graphics and icons. WebP is a modern format developed by Google that offers superior compression compared to PNG and JPEG, with support for transparency and animation. Choose the format that best suits your use case—PNG for general use, JPEG for smallest file size, SVG for infinite scalability, or WebP for modern web projects.

Frequently Asked Questions

What image formats are supported? ▼
This tool supports PNG, JPEG, SVG, and WebP formats. PNG is best for crisp graphics with transparency support and is widely compatible. JPEG is ideal for smaller file sizes when some compression is acceptable. SVG is perfect for vector graphics that scale infinitely without quality loss—great for icons and simple graphics. WebP offers modern compression with good quality and smaller file sizes, though browser support is not universal in older browsers. Choose the format based on your specific needs and target browsers.
What are common use cases for placeholder images? ▼
Placeholder images are used in wireframes and mockups to visualize layout before final images are available. They're essential for testing responsive layouts across different screen sizes and devices. Developers use them when prototyping designs, creating documentation and tutorials, building dummy content for development and testing, and demonstrating image layouts to clients or stakeholders. They're also useful for creating loading states, testing lazy loading implementations, and filling content management systems during development.
How do I use the generated placeholder in my website? ▼
You have two options: download the image file and host it with your website assets, or use the data URI directly in your HTML. To download, click the "Download Image" button and save the file to your project. To use a data URI, copy the generated data URI and paste it directly into your img tag's src attribute. Data URIs embed the image directly in your HTML, eliminating an HTTP request, but can make your HTML file larger. For small placeholders or quick prototypes, data URIs are convenient. For production use, hosting image files separately is usually preferred.
What is a data URI? ▼
A data URI is a way to embed file content directly in a URL using Base64 encoding. Instead of referencing an external image file (src="image.png"), you embed the image data in the HTML (src="data:image/png;base64,..."). Data URIs eliminate separate HTTP requests, which can improve performance for small images. However, they increase HTML file size and cannot be cached separately. They're perfect for small placeholders, inline icons, or quick prototypes. The format is: data:[MIME-type];base64,[encoded-data]. This tool generates complete data URIs ready to use in your img tags.
What are the size limits for generated images? ▼
This tool supports generating images up to 4000x4000 pixels. For most web use cases, this is more than sufficient—even 4K displays are typically 3840x2160. Very large images may take a moment to generate and will produce larger data URIs. If you need extremely large placeholders, consider using SVG format, which scales infinitely without increasing file size. For typical use cases (banners, thumbnails, content images), dimensions between 100x100 and 2000x2000 pixels work best. Remember that larger images create larger data URIs, so for data URI use, keep dimensions reasonable.
Can I customize the text displayed on the placeholder? ▼
Yes! By default, the placeholder displays its dimensions (e.g., "800x600"), which is helpful for identifying image sizes during development. However, you can enter custom text in the "Custom Text" field to display anything you want—product names, labels, categories, or placeholder descriptions like "Hero Image" or "Profile Photo". You can also adjust the font size to make the text larger or smaller. If you leave the custom text field empty, it automatically shows the dimensions. This flexibility makes it easy to create context-specific placeholders for different parts of your design.
Is this tool really free? Are my images private? ▼
Yes, this tool is completely free with no sign-up, subscription, or hidden fees. All image generation happens entirely in your browser using JavaScript and the HTML Canvas API. Nothing is uploaded to any server, and no data leaves your device. Your color choices, text, and generated images are completely private. The tool works offline once the page is loaded. You can even disconnect from the internet and continue generating placeholders. Your privacy is guaranteed because all processing is local.
What are the quick presets for? ▼
Quick presets provide one-click access to common image dimensions used in web and app development. Instead of manually entering width and height, click a preset to instantly set dimensions for social media banners (Facebook, Twitter, LinkedIn), thumbnails, avatars, HD displays, mobile screens, and more. Presets include common aspect ratios like 16:9, 4:3, 1:1 (square), and portrait ratios. They save time when you need standard sizes and ensure you're using the correct dimensions for specific platforms. You can still adjust colors, text, and format after selecting a preset.

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