Convert HTML5 Banner Ads to Video

One Creative, Two Formats

Display teams pour hours into HTML5 banners, then hit a wall: the video placement on the media plan wants an MP4. Social ad slots, connected-TV inventory, digital signage players, and client preview reels all expect a video file, and none of them will execute your banner's HTML, CSS, and timeline. Rebuilding the creative in After Effects doubles the work and rarely matches the original pixel for pixel.

A faster path is to render the banner itself. Paste its markup into the HTML to Video Converter and a server-side Chrome plays the creative exactly as a browser would, capturing every frame and encoding an H.264 MP4. Fonts, easing curves, and stacking order survive intact because it is the same rendering engine your banner was built for.

Worked Example: A Sale Banner with Staggered Entrance

This self-contained banner uses the pattern most display creatives follow: elements enter in sequence (badge, headline, CTA), then the call-to-action pulses to hold attention. The entrance takes about 1.4 seconds and runs once thanks to animation-fill-mode: both; the pulse then loops.

<div class="banner">
  <div class="badge">SUMMER SALE</div>
  <h1 class="headline">40% OFF<br>Everything</h1>
  <div class="cta">Shop Now</div>
</div>

<style>
.banner {
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 32px;
  background: linear-gradient(160deg, #7c3aed, #4f46e5);
  font-family: Arial, sans-serif; text-align: center;
}
.badge {
  padding: 10px 26px; border-radius: 999px;
  background: rgba(255,255,255,.2); color: #fff;
  letter-spacing: 5px; font-size: 24px;
  animation: drop 0.8s ease-out both;
}
.headline {
  color: #fff; font-size: 100px; line-height: 1.05; margin: 0;
  animation: drop 0.8s ease-out 0.3s both;
}
.cta {
  padding: 20px 52px; background: #facc15; color: #1f2937;
  font-weight: bold; font-size: 32px; border-radius: 14px;
  animation: drop 0.8s ease-out 0.6s both,
             pulse 1.2s ease-in-out 1.6s infinite;
}
@keyframes drop {
  from { opacity: 0; transform: translateY(-26px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.07); }
}
</style>

Step by Step

1. Paste the banner code into the converter.
2. Choose the Square (1:1) preset (1080×1080) — the most reusable size for social ad placements.
3. Set Duration to 6s: the entrance plays once, then the CTA pulses for the remaining seconds.
4. Set FPS to 30, the norm for ad video, and pick a background color matching the creative's gradient edge.
5. Convert, preview, and download the MP4 for trafficking.

Prepping a Real Banner for Conversion

Production banners usually need three small edits before pasting. First, strip the click plumbing: clickTag variables, exit handlers, and tracking pixels do nothing in a video and ad-server scripts may fail to load, stalling your animation. Second, inline the assets — move CSS into a <style> block and convert small images to data URIs so nothing external can miss the capture window. Third, let the creative fill the frame: banners are built at fixed sizes like 300×250, so replace the fixed wrapper dimensions with width:100%; height:100% and scale font sizes up for the 1080-pixel canvas, or your artwork will sit tiny in a corner.

Timing translates directly: capture starts at page load and runs for the duration you set, between 1 and 15 seconds. Staggered animation-delay values are fine here — unlike a looping animation, a banner is supposed to build over its first seconds. Just make sure the total clip length covers the full entrance plus at least one loop of any repeating element, and remember the finished MP4 is silent, which suits ad platforms that autoplay muted anyway.

Frequently Asked Questions