Générateur d'images de remplacement

À PROPOS DE CET OUTIL

Set a width, height, background color, and label text, and this tool generates a placeholder image on the spot — no image search, no stock photo licensing, no waiting for real assets. Designers and developers drop these into mockups, wireframes, and prototype layouts to visualize how a page will look once actual images are ready. You can label each placeholder with its dimensions, like '800x600', so everyone on the team instantly knows the expected image slot size. Because generation happens instantly in the browser, you can create dozens of differently sized placeholders in seconds while building out a full page layout or component library.

COMMENT UTILISER

1. Enter the exact width and height you need in pixels.
2. Pick a background color, or use the default gray.
3. Type custom label text, such as the dimensions or a description.
4. Preview the generated placeholder image.
5. Download it or copy the image URL to use in your design tool or code.

CAS D'USAGE COURANTS

• A UI designer building an HTML prototype who needs correctly sized image boxes before the photography is shot.
• A frontend developer scaffolding a component library and needing placeholder avatars, banners, and thumbnails at exact pixel dimensions.
• A freelancer sending a client a wireframe that clearly labels each image slot with its required size.
• A student building a portfolio site who needs filler images while writing the layout CSS.
• A QA tester checking how a responsive layout behaves with images of specific aspect ratios before real content is loaded.

CONSEILS ET ERREURS COURANTES

• Match the placeholder's dimensions exactly to your final image slot so you can catch layout issues like cropping or stretching early.
• Use a label that states the aspect ratio or intended use, like 'hero-1920x600', rather than a generic name, so teammates immediately understand its purpose.
• High-contrast background colors make it easier to spot alignment or padding issues in a layout during review.
• Swap placeholders out before launch — search engines and screen readers should never see filler graphics or 'placeholder' alt text in production.

AUTRES QUESTIONS

Can I generate a placeholder with a transparent background?

Yes, if you select a transparent option instead of a solid color, useful for testing how an image slot looks over different page backgrounds.

What image format does the generator output?

Placeholders are typically output as PNG, which keeps text labels sharp and file sizes small for a purely functional mockup image.

How is this different from grabbing a random stock photo for a mockup?

A placeholder image tells your team exactly what dimensions are expected at a glance, while a stock photo can mislead reviewers into commenting on the photo content instead of the layout.

Can I create placeholders with non-standard aspect ratios, like ultra-wide banners?

Yes, any width and height combination works, which is useful for testing unusual layouts like hero banners or square social media thumbnails.

GUIDES ASSOCIÉS

OUTILS ASSOCIÉS