How it works
The Placeholder Image Generator creates solid-color or gradient placeholder images at any pixel dimension, with optional centered label text. Placeholder images are used during development and design when real photography isn't available yet.
In web development, before final images are ready, you need something at the correct dimensions so the layout doesn't collapse. HTML image tags without a src break the page. CSS background placeholders require extra markup. This tool generates a 800×400px or 300×300px image (or any custom dimension) in seconds.
How to use it: set the width and height in pixels. Choose a background color (solid) or a gradient. Optionally type label text (e.g., "800×400" or "Product Photo") — the text is centered in a contrasting color. Select the output format (PNG is recommended for placeholder images). Click Generate and Download.
Standard placeholder sizes: 1200×630px (Open Graph image), 800×400px (blog hero), 300×300px (product thumbnail square), 400×400px (profile photo), 1920×1080px (full HD background), 1080×1920px (mobile story), 728×90px (leaderboard ad).
Color options: enter any hex color for the background. The label text color is automatically calculated to be white or black (whichever provides the higher contrast ratio against the background) to ensure the dimension label is always readable.
Gradient placeholders: enable the gradient mode to generate two-color linear gradients — useful for creating branded placeholder cards that look intentional rather than missing.
Privacy: placeholder generation runs entirely in the Canvas API. No data is sent anywhere.
Frequently Asked Questions
- 1200×630px is the standard Open Graph image size (also used by Twitter/X cards and LinkedIn). This is the most commonly needed placeholder for web development — it fills the meta og:image slot and prevents broken social shares during development.
- Yes. Type any label text into the label field — the tool centers it on the image with a contrasting color (auto-selected for legibility). Common labels include the dimension (800×400), a description (Hero Image), or a placeholder code (IMG_001).
- External placeholder services require an HTTP request on every page load. In offline development environments or secure CI environments that block external traffic, they fail silently. A local placeholder image file is always available.
- A medium-gray (#CCCCCC or #E0E0E0) is the convention — visible but neutral, it doesn't distract from the layout evaluation. For branded placeholders that match a project's color scheme, use the brand's primary color.