What a placeholder is for
A placeholder image fills a content slot with a correctly-sized dummy graphic — usually labeled with its dimensions (800 × 600) — so you can build and evaluate a layout before the real images exist. It keeps spacing, alignment, and aspect ratios honest during design, letting you focus on structure without being distracted by (or blocked on) final assets. This generator produces exact-dimension placeholders with custom colors, text, and presets for common formats.
Size it like the real thing
The point of a placeholder is fidelity to the real slot, so match the dimensions you’ll actually use:
| Preset | Size |
|---|---|
| Instagram post | 1080×1080 |
| YouTube thumbnail | 1280×720 |
| Open Graph image | 1200×630 |
| Web banner | 728×90 |
| App icon | 512×512 |
Using the true target size means your layout testing reflects reality — a placeholder at the wrong dimensions hides the spacing and overflow problems you’re trying to catch. Enable the @2x Retina option to generate at double density so the placeholder looks crisp on HiDPI screens, just like a properly-sized real image would.
Data URI vs file
The tool can output a Data URI you paste straight into src or CSS url() — handy for throwaway prototypes and email templates because there’s no file to manage and no extra request. The trade-off is that Data URIs bloat your HTML/CSS by ~33% and aren’t cached separately, so for anything beyond quick scaffolding, a real file reference is leaner. Either way, it’s temporary by definition.
Don’t confuse it with a loading state
A frequent mix-up: placeholders are build-time scaffolding, while skeleton screens and LQIP are runtime UX for real users (see FAQ). If your goal is to improve how an image-heavy page feels while loading, you want a skeleton or a blurred low-quality preview of the actual image — not a dummy graphic. And remember the cardinal rule: every placeholder must be replaced with real content before launch. Everything here generates locally via Canvas, so nothing uploads.