AI placeholder image API with global CDN delivery

Basic Usage

Drop this snippet directly into your HTML to request a unique placeholder on the fly.

<img src="https://placeholdr.dev/{width}x{height}/{prompt}" />

All Parameters

Add these parameters to the URL to customize the placeholder.

<img src="https://placeholdr.dev/{width}x{height}/{prompt}?style={style}&seed={int}" />

• Width and height: required, integers between 64 and 2048, any aspect ratio

• Prompt: text description of the desired image ("space" by default)

• Style: photographic (default), digital-art, anime

• Seed: integer between 1 and 3 (1 by default) for alternative outputs

Demo

Prompt

Width (px)

Height (px)

Style Photographic Digital art Anime

Seed 1 2 3

Generate image

Estimated generation time: 2–20 seconds

The preview updates automatically when your image is ready.

https://placeholdr.dev/320x320/black%20cat?style=anime&seed=2 Copy

Usage limits

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Limits reset at midnight UTC.
Need more? hello@placeholdr.dev

Why placeholdr.dev?

• Cloudflare network: Powered by Cloudflare Workers at the edge with R2 backing so renders stay cached globally and load fast.
• Flux model: Powered by Flux diffusion model for quality placeholder imagery.
• Simple URL API: Works anywhere you can drop an <img> tag or background image.
• Fast initial generation: Fresh prompts render in a few seconds, then stay cached in R2 for near-instant deterministic repeats.
• Start with one URL: No account or API key needed to generate an image. Subscribe to Pro for higher limits.

Frequently Asked Questions