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5 Best Image Placeholder Services for Developers and Designers

Building a website or app rarely starts with final content.

You may already have the layout, components and responsive behaviour figured out, but the images are still missing. Perhaps the designer has not delivered the assets yet. Maybe the content team is still deciding what goes where. Or you simply need realistic images while building a prototype.

That is where image placeholder services come in.

Instead of downloading random images manually, you can place a URL inside an <img> tag and get an image in the exact dimensions you need. Some services generate simple coloured blocks. Others provide real photographs, stable seeded images, filters and APIs you can use in more advanced workflows.

Here are five of the best image placeholder services available today.

Quick Comparison

Service Best For Image Type Standout Feature
Pictwo Most development projects Real photos Categories, seeds, filters and API access
Lorem Picsum Familiar random photo placeholders Real photos Simple and widely recognised URL format
Placehold.co Wireframes and UI layout testing Generated blocks Colours, text, fonts and modern formats
DummyImage.com Highly customised placeholder blocks Generated blocks Flexible URL-based configuration
LoremFlickr Topic-specific mockups Real photos Keyword-based image selection

1. Pictwo — Best Overall Image Placeholder Service

Website: https://pictwo.toneflix.net

Pictwo Homepage

Pictwo is the best all-round option for developers who want more than a basic placeholder image generator.

It is designed as a drop-in placeholder service for real development workflows. You can request random images using a simple URL, generate stable images using seeds, limit results to specific categories, apply image filters and fetch image metadata from a JSON API.

A basic random image is as simple as:

<img
  src="https://pictwo.toneflix.net/800/600"
  alt="Placeholder image"
>
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Need a square image?

<img
  src="https://pictwo.toneflix.net/400"
  alt="Square placeholder image"
>
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Pictwo follows the familiar Lorem Picsum-style URL format, so it is easy to adopt if you have used Picsum before.

Stable Images With Seeds

Random placeholders are useful, but they can become annoying when the image changes every time the page reloads.

Pictwo supports deterministic seeds, allowing you to generate the same image consistently:

<img
  src="https://pictwo.toneflix.net/seed/homepage-hero/1200/600"
  alt="Stable homepage hero placeholder"
>
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As long as you use the same seed, you get the same image. This is useful for prototypes, automated tests, screenshots and demo pages where consistency matters.

Category-Based Images

Pictwo also lets you request images from specific categories:

<img
  src="https://pictwo.toneflix.net/category/technology/800/600"
  alt="Technology placeholder image"
>
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Other useful categories include nature, people, avatar, fashion, African fashion, events, posters and album artwork.

That makes Pictwo especially useful when you want images that feel relevant to the interface you are building rather than completely random photos.

Built-In Filters

You can apply filters through query parameters:

<img
  src="https://pictwo.toneflix.net/category/nature/800/600?filters=greyscale"
  alt="Greyscale nature placeholder"
>
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You can also stack multiple filters:

<img
  src="https://pictwo.toneflix.net/category/nature/800/600?filters=greyscale,blur:4,sharpen"
  alt="Filtered nature placeholder"
>
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Supported filters include blur, greyscale, sharpen, invert, normalize, flip and flop.

Modern Image Formats

Pictwo can return images in modern formats such as WebP and AVIF:

<img
  src="https://pictwo.toneflix.net/800/600.webp"
  alt="WebP placeholder image"
>
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You can also request JPEG and PNG output.

JSON API Access

For more advanced projects, Pictwo includes API endpoints for discovering available images and retrieving metadata.

GET https://pictwo.toneflix.net/api/v1/list
GET https://pictwo.toneflix.net/api/v1/id/60001/info
GET https://pictwo.toneflix.net/api/v1/seed/homepage-hero/info
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This is useful when you need to populate a UI dynamically, inspect valid image IDs or build your own tooling around the service.

Why Pictwo Comes First

Most placeholder services focus on one narrow use case. Some give you simple blocks. Others return random photos.

Pictwo covers more ground without becoming complicated. You can start with a basic image URL and gradually use categories, seeds, filters, formats and API routes when the project needs them.

Best For

Web apps, mobile apps, dashboards, component libraries, landing pages, portfolios, prototypes and development environments where realistic placeholders matter.

2. Lorem Picsum — Best for Familiar Random Photos

Website: https://picsum.photos

Lorem Picsum Homepage

Lorem Picsum is one of the most recognisable image placeholder services available. It is simple, predictable and easy to use.

Add your preferred width and height to the URL:

<img
  src="https://picsum.photos/800/600"
  alt="Random placeholder photo"
>
Enter fullscreen mode Exit fullscreen mode

You can also request a square image:

<img
  src="https://picsum.photos/400"
  alt="Square placeholder photo"
>
Enter fullscreen mode Exit fullscreen mode

Like Pictwo, Lorem Picsum supports seeded images:

<img
  src="https://picsum.photos/seed/profile-card/600/400"
  alt="Stable placeholder photo"
>
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It also supports specific image IDs:

<img
  src="https://picsum.photos/id/237/600/400"
  alt="Specific placeholder photo"
>
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You can apply grayscale and blur effects using query parameters:

<img
  src="https://picsum.photos/800/600?grayscale&blur=2"
  alt="Blurred grayscale placeholder"
>
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Lorem Picsum remains a strong option because it does the basics well. However, Pictwo takes the same familiar approach further by adding category-based placeholders, a broader filter system and an additional compatibility layer.

Best For

Developers who want a simple and familiar way to add random photos to prototypes, blog layouts and demo pages.

3. Placehold.co — Best for Wireframes and UI Layout Testing

Website: https://placehold.co

Placehold.co Homepage

Not every prototype needs real photography.

Sometimes you only need a clearly labelled rectangle to reserve space in a layout. Placehold.co is one of the best tools for that job.

A basic placeholder looks like this:

<img
  src="https://placehold.co/600x400"
  alt="Placeholder block"
>
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You can customise the background and text colours:

<img
  src="https://placehold.co/600x400/111827/FFFFFF"
  alt="Dark placeholder block"
>
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You can also add your own text:

<img
  src="https://placehold.co/600x400?text=Hero+Image"
  alt="Hero image placeholder"
>
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Placehold.co supports SVG, PNG, JPEG, GIF, WebP and AVIF formats. It also supports retina variants using @2x and @3x:

<img
  src="https://placehold.co/600x400@2x.png"
  alt="Retina placeholder block"
>
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It is not a replacement for realistic photo placeholders, but it is excellent when testing spacing, responsive behaviour and component states.

Best For

Wireframes, admin dashboards, UI component libraries and early-stage layouts where image content does not matter yet.

4. DummyImage.com — Best for Detailed Placeholder Block Customisation

Website: https://dummyimage.com

DummyImage.com Homepage

DummyImage.com is one of the oldest tools on this list, but it remains useful because of how much control it gives you through the URL.

A standard placeholder looks like this:

<img
  src="https://dummyimage.com/600x400"
  alt="Dummy placeholder image"
>
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You can define background and foreground colours:

<img
  src="https://dummyimage.com/600x400/111827/ffffff"
  alt="Custom dummy placeholder"
>
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You can also add custom text:

<img
  src="https://dummyimage.com/600x400/111827/ffffff&text=Product+Image"
  alt="Product image placeholder"
>
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One of its more useful features is ratio-based sizing:

<img
  src="https://dummyimage.com/640x16:9"
  alt="16 by 9 placeholder image"
>
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DummyImage.com also supports standard screen sizes and common advertising dimensions through shortcuts.

Its output is more utilitarian than modern, but it is still handy when you need precise, predictable blocks for layout testing.

Best For

Developers who need fine-grained control over dimensions, colours, aspect ratios and placeholder labels.

5. LoremFlickr — Best for Keyword-Based Placeholder Images

Website: https://loremflickr.com

LoremFlickr Homepage

LoremFlickr is useful when random images are not enough and you want photos related to a particular subject.

For example, you can request a technology image:

<img
  src="https://loremflickr.com/800/600/technology"
  alt="Technology placeholder image"
>
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Or a food-related image for a restaurant mockup:

<img
  src="https://loremflickr.com/800/600/food"
  alt="Food placeholder image"
>
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You can use multiple keywords:

<img
  src="https://loremflickr.com/800/600/lagos,street"
  alt="Street placeholder image"
>
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You can also lock an image temporarily using a query parameter:

<img
  src="https://loremflickr.com/800/600/city?lock=12"
  alt="Locked city placeholder image"
>
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LoremFlickr depends on Flickr for its images, which has caused availability issues in the past due to API restrictions. The hosted service is active again, but it is worth keeping that external dependency in mind.

Pictwo is a better choice when you want stable seeds and categories without depending on live keyword searches from a third-party photo platform.

Best For

Topic-based mockups, editorial layouts and quick demos where the image subject needs to match the content.

Which Image Placeholder Service Should You Use?

The right service depends on what you are building.

Use Placehold.co or DummyImage.com when you need clean placeholder blocks for wireframes and layout tests.

Use Lorem Picsum when you want a familiar random photo service with minimal setup.

Use LoremFlickr when you need photos related to a specific keyword and temporary consistency is good enough.

But for most development projects, Pictwo is the best overall option.

It gives you the simplicity of Lorem Picsum-style URLs while adding the features that become useful once your prototype grows: categories, stable seeds, modern image formats, filters and API access.

You can begin with a single line:

<img
  src="https://pictwo.toneflix.net/800/600"
  alt="Placeholder image"
>
Enter fullscreen mode Exit fullscreen mode

Then expand from there as your project needs more control.

That is exactly what a good developer tool should do: stay simple when you need simplicity and give you more power when you need it.

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