GIF to HTML5 Ad

Turn animated GIF banners into HTML5 ads: transparent VP9 video plus a WEBP poster fallback, searched to fit your byte budget, with clickTag wired. Runs entirely in your browser.

Runs in your browser- the file never leaves your device

Drop your GIF banners

One GIF per ad size (300×250, 728×90, 320×50…). Each becomes an HTML5 ad folder, encoded on your device.

Max file size: 1.5 GB (Browser memory limit)

Size budget per ad (whole folder)

KB (153,600 bytes)

Output profile

Best quality per byte, and animates everywhere including Safari/iOS (WebGL compositing). Downloads the ~30MB ffmpeg engine once to build.

Poster frame (static fallback)

Poster WEBP quality: 80

Lowered automatically only if nothing else fits.

Encoding effort

Default clickTag URL (optional)

Ad servers normally inject their own.

The encoder binary-searches quality (bitrate for VP9, CRF for H.264) and steps frame rate 20 → 15 → 12 until index.html + video + poster fit the budget, keeping the best quality that fits. Each GIF can take a minute or more on “Best”; several run in parallel.