ToolHub

Image Placeholder Generator

Create placeholder images at any size and color

Presets

Preview (800×450)

Generate placeholder images for mockups, wireframes, and testing layouts before you have real assets. Set any size and color, then download a PNG or copy a data URI to paste directly into HTML. Created entirely in your browser.

Overview

What this tool does

Generate placeholder images at any size with a custom background, text color, and label. Use them in mockups, wireframes, and layout testing before your real photos and graphics are ready. Download a PNG or copy a data URI to paste straight into your code. It all runs in your browser.

Design before assets

Why use placeholders?

When you're building a layout, you often need an image of the right size before the real one exists. Placeholders let you:

  • See how a layout looks at the correct image dimensions
  • Test responsive behavior with realistic content sizes
  • Build mockups and wireframes that feel complete
  • Avoid broken-image icons in early prototypes

Why offline is better

Local generation vs placeholder services

No external dependency

Online placeholder services (like via.placeholder.com) require a network request for every image, which slows your page and breaks if the service is down or you're offline. Generating locally gives you a real file with no third-party dependency — faster, more reliable, and private.

Quick reference

Common placeholder sizes

DimensionsUse for
1200 × 630social share image (OG)Facebook, LinkedIn, Twitter cards
1280 × 72016:9 video / thumbnailYouTube, hero banners
600 × 600squareInstagram posts, product images
200 × 200avatarprofile pictures
320 × 180thumbnailcards, previews
1080 × 1920story / verticalReels, TikTok, Stories

Two ways to use it

PNG download vs data URI

Download a PNG when you want a real image file to drop into a design tool or project folder. Copy the data URI when you want to embed the image directly in HTML or CSS without a separate file — handy for quick prototypes. For anything beyond tiny placeholders, a file is usually cleaner than a long data URI.

Behind the scenes

Privacy and how it runs

Runs in your browser

The image is drawn with the Canvas API on your device and downloaded directly. Nothing is sent to a server.

Common questions

What size should my placeholder be?

Match the dimensions of the real asset so your layout reflects reality. Use the presets for common sizes, or type any custom width and height.

Can I change the placeholder text?

Yes. By default it shows the dimensions (like "800 × 450"), but you can enter any custom label — a section name, a note, or nothing at all.

Are these images royalty-free?

They're solid-color images you generate yourself, so there are no licensing concerns. They contain no copyrighted content — just your chosen colors and text.

Can I use placeholders in a live site?

They're meant for development and mockups. Replace them with real images before launching — placeholders signal "content coming" and aren't a substitute for final assets.

What's the maximum size?

You can generate up to 4096 × 4096 pixels, which covers nearly all web and design needs. Larger canvases can hit browser memory limits.

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Quick steps

1

Set the size

Type any width and height, or tap a preset like 16:9, square, or banner.

2

Choose colors and text

Pick a background and text color, and add a custom label (defaults to the dimensions).

3

Download or copy

Download a PNG, or copy a data URI to paste directly into your HTML or CSS.

Frequently asked questions

What is a placeholder image?

A simple stand-in image used in mockups, wireframes, and layouts before the real photos or graphics are ready. It usually shows its dimensions so you can see how the space will look at the correct size.

Why generate placeholders locally?

Many placeholder services (like via.placeholder.com) require a network request for every image, which slows pages and depends on a third party. Generating locally gives you an actual file with no external dependency, and it works offline.

What's a data URI and when should I use it?

A data URI embeds the image directly in your HTML or CSS as text, so no separate file or request is needed. It's handy for tiny placeholders in prototypes. For larger images, a regular PNG file is better.

What size should my placeholder be?

Match the real asset's dimensions so your layout reflects reality. Common sizes: 1200×630 for social share images, 16:9 (like 1280×720) for video thumbnails, 1:1 for avatars and feed posts.

Can I use these in production?

Placeholders are meant for development and mockups, not final sites. Replace them with real images before launching. They're perfect for testing responsive layouts and spacing.

Is anything uploaded?

No. The image is drawn in your browser with the Canvas API and downloaded directly. Nothing is sent to a server.