Placeholder Images API

Placeholder Images API

Placeholder Images API is a lightweight, high-performance REST API that enables developers and designers to generate customizable placeholder images on demand.

Whether you're building websites, mobile applications, design systems, prototypes, content management systems, documentation, mockups, or testing environments, this API provides a quick and reliable way to create placeholder graphics without storing static assets.

The API supports both PNG and SVG output formats, allowing developers to choose between raster images for general use or scalable vector graphics for responsive interfaces and print-quality assets.

Customize image dimensions, background color, text color, and display labels with simple query parameters. If no custom label is provided, the API automatically displays the image dimensions (for example, 640×480), making it ideal for wireframes, templates, and responsive layout development.

With its stateless architecture and fast response times, Placeholder Images API integrates seamlessly into modern development workflows and production environments.

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Features

• Generate placeholder PNG images
• Generate scalable SVG placeholders
• Custom image width and height
• Custom background colors
• Custom text colors
• Custom placeholder labels
• Automatic dimension labels
• REST API
• API Key authentication
• Lightweight responses
• High-performance image generation
• Stateless architecture
• Production-ready
• Easy integration

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Supported Output Formats

Format	Description
PNG	Raster placeholder image suitable for websites, mobile apps, and testing
SVG	Scalable vector placeholder ideal for responsive layouts, design systems, and print

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API Endpoints

Generate PNG Placeholder

GET

/{width}/{height}

Generate a PNG placeholder image with customizable dimensions and colors.

Parameters

Name	Type	Required	Description
width	integer	Yes	Image width in pixels
height	integer	Yes	Image height in pixels
background	string	No	Background color (6-digit HEX)
color	string	No	Text color (6-digit HEX)
text	string	No	Custom label displayed in the center. If omitted, image dimensions are displayed automatically.

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Generate SVG Placeholder

GET

/svg/{width}/{height}

Generate a scalable SVG placeholder image with customizable dimensions and colors.

Parameters

Name	Type	Required	Description
width	integer	Yes	Image width in pixels
height	integer	Yes	Image height in pixels
background	string	No	Background color (6-digit HEX)
color	string	No	Text color (6-digit HEX)
text	string	No	Custom label displayed in the center. If omitted, image dimensions are displayed automatically.

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Parameters

width

The width of the generated image in pixels.

Example

640

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height

The height of the generated image in pixels.

Example

480

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background

Background color using a 6-digit hexadecimal value.

Examples

CCCCCC

F5F5F5

007BFF

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color

Text color using a 6-digit hexadecimal value.

Examples

333333

FFFFFF

000000

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text

Optional text displayed in the center of the placeholder image.

Examples

Coming Soon

Product Image

Hero Banner

If omitted, the image dimensions are displayed automatically (for example, 640×480).

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Authentication

All requests require an API Key.

Include the following header:

x-service-api-key: YOUR_API_KEY

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Example Requests

Generate a PNG placeholder

GET /640/480

Generate a custom SVG placeholder

GET /svg/1200/630?background=3366CC&color=FFFFFF&text=OpenGraph

Generate a product image placeholder

GET /800/800?background=F5F5F5&color=333333&text=Product+Image

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Example Responses

PNG Response

Content-Type: image/png

SVG Response

Content-Type: image/svg+xml

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Common Use Cases

Perfect for:

• Website development
• Mobile applications
• UI/UX design
• Wireframes
• Mockups
• Landing pages
• Design systems
• CMS platforms
• E-commerce websites
• Product catalogs
• Image placeholders
• API documentation
• Blog templates
• Portfolio websites
• Responsive layout testing
• Email templates
• Dashboard development
• Automated testing
• Component libraries
• Presentation builders

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Error Responses

Code	Description
400	Invalid dimensions or parameters
401	Invalid API Key
429	Rate limit exceeded
500	Internal server error

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Performance

• Fast image generation
• Low latency
• Lightweight responses
• Stateless architecture
• High throughput
• Horizontally scalable
• Production-ready
• Cloud-native

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Best Practices

• Use SVG placeholders for responsive web applications and scalable graphics.
• Use PNG placeholders for mobile apps, image previews, and legacy systems.
• Match placeholder dimensions to your production assets to minimize layout shifts.
• Use descriptive labels such as "Profile Image" or "Product Photo" during development.
• Choose high-contrast text and background colors for maximum readability.

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SDK Compatibility

Compatible with every HTTP client and programming language, including:

• JavaScript
• TypeScript
• Python
• Go
• Java
• C#
• PHP
• Ruby
• Rust
• Swift
• Kotlin
• Dart
• cURL

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Categories

• Image Generation
• Developer Tools
• Design
• UI/UX
• Web Development
• Graphics
• Testing
• Utilities

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