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Sample Ad Generator

Build realistic placeholder ad units in every standard IAB size to test how your layout handles real ad slots.

Ad format
Color scheme
300 × 250 px
Ad · Sample
Acme Corp
Save 30% today
Limited-time offer on all annual plans.
Shop Now
View HTML/CSS source
<a href="https://dummycontent.site" style="display:block;position:relative;overflow:hidden;width:300px;height:250px;border-radius:10px;text-decoration:none;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(135deg,#2563eb,#1e3a8a);box-sizing:border-box;">
  <span style="position:absolute;top:8px;left:8px;font-size:9px;letter-spacing:.06em;text-transform:uppercase;background:rgba(255,255,255,.18);color:#ffffff;padding:2px 6px;border-radius:4px;">Ad &middot; Sample</span>
  <div style="position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;padding:28px 25px;">
    <div style="font-size:11px;color:rgba(255,255,255,.85);margin-bottom:4px;">Acme Corp</div>
    <div style="font-size:20px;font-weight:700;line-height:1.2;color:#ffffff;margin-bottom:6px;">Save 30% today</div>
    <div style="font-size:13px;color:rgba(255,255,255,.85);margin-bottom:14px;max-width:90%;">Limited-time offer on all annual plans.</div>
    <span style="display:inline-block;width:fit-content;background:#ffffff;color:#1e3a8a;font-size:12px;font-weight:600;padding:8px 14px;border-radius:6px;">Shop Now</span>
  </div>
</a>

Why test with sample ads?

Ad slots are some of the hardest elements to design around — variable sizes, third-party content, and layouts that need to hold up whether the slot is filled or empty. Dropping in a realistic placeholder unit lets you catch overflow, spacing, and responsive issues before a real ad network is wired in.

Formats at a glance

  • Display banners — leaderboard, rectangle, and skyscraper sizes for sidebars and headers.
  • Large formats — half-page, billboard, and large leaderboard units for high-impact placements.
  • Flexible & native — responsive, native, and in-feed units that blend into surrounding content.
  • Rich media — video and popup/interstitial previews for richer ad experiences.

Frequently asked questions

Are these real ads or ad-network code?

No. Every unit is placeholder HTML/CSS with no tracking scripts, third-party requests, or ad-network integration — purely for testing how a layout holds up with ad-shaped content.

What ad sizes are supported?

All standard IAB formats: leaderboard, mobile leaderboard, rectangles, skyscrapers, half-page, billboard, plus responsive, native, in-feed, video, and popup/interstitial layouts.

Can I drop the generated HTML into my own project?

Yes — each ad is self-contained, inline-styled markup with no external dependencies, so it renders correctly regardless of whether your project uses Tailwind, plain CSS, or nothing at all.

Can I customize the copy and colors?

Yes. Advertiser name, headline, description, and CTA text are all editable, along with size and one of several built-in color schemes.