Placeholder Images for Developers

Developer projects — component libraries, admin dashboards, and web apps — need placeholder images before real assets are available. This preset covers the most common image slots in typical web application layouts.

Size reference

NameDimensionsDescription
hero1600x900Hero banner — 1600×900px (16:9), the full-width page header image
component_card960x720Component card — 960×720px (4:3), fits card, panel, and media object components
dashboard_widget640x360Dashboard widget — 640×360px (16:9), fills chart and data visualization placeholders
modal720x540 @2xModal hero — 720×540px @2x, high-DPI image for modal dialogs and lightboxes
thumb420x247Thumbnail — 420×247px (approx 16:9), compact thumbnail for list and grid items

Why these sizes matter

Placeholder images in a development environment give every image slot a defined size and label so layouts render correctly from the first commit. A hero image placeholder at 1600×900 prevents layout shift when the real photo is added. Component card placeholders at 960×720 keep Storybook stories stable. Dashboard widget placeholders at 640×360 fill charts and preview areas consistently across environments.

Use cases

Component library development

Populate Storybook stories with correctly sized placeholder images for every component variant. Keep baselines stable for Chromatic visual regression.

Admin dashboard scaffolding

Fill dashboard widget slots, data table thumbnails, and chart placeholders with labeled images that communicate the intended content type.

API and database seeding

Use the PlacePack REST API to generate image URLs for database seeds and fixtures. Deterministic URLs mean the same spec always produces the same image.

FAQ — Frequently asked questions

What is the standard hero image size for web apps?
1600×900px (16:9) is a common full-width hero size. It displays well on 1440px-wide desktop screens and scales cleanly to mobile.
Should I use SVG or PNG for development placeholders?
SVG is lighter and scales perfectly, making it ideal for Storybook and documentation. PNG is better for visual regression tests where pixel-exact comparison matters.
Can I generate these sizes via the API?
Yes. Each size in this preset corresponds to a spec string you can pass to GET /api/v1/{spec}.{format}. Use POST /api/v1/pack to download all sizes as a ZIP in one request.

Ready to generate Developers placeholder images?

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