Quantcast HTML5 banner specs

Independent audience platform buying display, video, native, CTV and audio inventory. Hosts an HTML5 creative uploaded as a single ZIP with a static backup image, caps the package per IAB size (largest 550 KB), and requires a 30-second / three-loop animation limit at 24 FPS with audio permitted only after a user click.

Sourced from Quantcast documentation · 24 September 2026Foldwrap exports to Quantcast

Also known as Quantcast Platform, Quantcast Advertise, QC.

Check a ZIP against QuantcastExport a bundle for Quantcast

Quantcast banner requirements

CategoryDSP
RegionsGLOBAL, US, EU
Maximum ZIP size550 KB zipped
Entry fileindex.html
Secure referencesEvery external reference must be served over HTTPS
Click methodclickTag variable
Click variableclickTag
Click URL at exportLeft empty — the platform sets it when the ad is trafficked
Multiple click destinationsOne click area per banner
Maximum animation length30s
Maximum loops3
AudioAllowed
Backup imageRequired alongside the HTML5 creative

Official requirements Also from Quantcast: Creative Specifications (Display), FAQ Creatives (hosted size ceiling, single click area), Creative Macros (click measurement), FAQs Agencies (display technical requirements, supported third-party tags).

Quantcast clickTag code

This is the click declaration Foldwrap writes into an HTML5 export for Quantcast, with a placeholder destination. Copy it into your own creative if you are hand-building the banner.

Quantcast clickTag
var clickTag = "https://www.example.com/landing";

Quantcast sets the destination at trafficking time, so an empty value in the exported file is correct and expected.

Why Quantcast rejects a banner

These are the rules Foldwrap checks a package against before it is delivered to Quantcast. Each is derived from the requirements above, so a constraint Quantcast does not state is not checked and is not listed.

  • errorAnimation runs longer than allowedShorten the timeline or reduce the loop count.
  • errorClick is not wired for this platformDeclare clickTag in the creative and open it on click.
  • errorExceeds size limitCompress images, subset fonts to the glyphs actually used, and drop unused assets.
  • errorNo entry HTMLAdd index.html at the ZIP root.
  • errorReferenced asset is not in the packageRe-export the creative so every referenced asset is bundled.
  • errorToo many animation loops
  • warningBackup image not included
  • warningElement destinations flatten hereKeep a target that supports element destinations in the set, or set a default click URL that suits every element.

Foldwrap runs these checks on every package it exports for Quantcast, and names the creative and the constraint when one fails.

Sources

Every figure above, with the document it came from and the date we read it.

  • The maximum file size varies by creative, but the largest we host is 550 KB.

    help.quantcast.com · retrieved 24 September 2026

  • For HTML5, provide one zipped folder for each creative containing all assets (CSS, images, JavaScript, HTML, etc).

    help.quantcast.com · retrieved 24 September 2026 · likely

  • HTML5 creatives require a zipped folder containing all assets (CSS, images, JavaScript, HTML) plus backup images.

    help.quantcast.com · retrieved 24 September 2026

  • 30 Seconds 3 Loops

    help.quantcast.com · retrieved 24 September 2026

  • 30 Seconds 3 Loops

    help.quantcast.com · retrieved 24 September 2026

  • 24 FPS

    help.quantcast.com · retrieved 24 September 2026

  • Click Only

    help.quantcast.com · retrieved 24 September 2026

  • Click Only

    help.quantcast.com · retrieved 24 September 2026

  • Backup images for each are required.

    help.quantcast.com · retrieved 24 September 2026

  • Quantcast requires all clients to provide SSL-compliant tags.

    help.quantcast.com · retrieved 24 September 2026

  • Display creatives are not currently limited to the pixel sizes listed below.

    help.quantcast.com · retrieved 24 September 2026

  • Multiple click-outs within QC-hosted rich media ads are not currently supported (i.e., different parts of an ad clicking to different destinations). The entire unit would be considered a single click area, with one click-out only.

    help.quantcast.com · retrieved 24 September 2026

  • Supported vendors include DCM (Google), FlashTalking, Sizmek (Mediamind), Adform

    help.quantcast.com · retrieved 24 September 2026 · likely

Frequently asked

What is the maximum file size for a Quantcast HTML5 banner?
Quantcast accepts an HTML5 package up to 550 KB zipped. Note what the cap measures: a bundle can compress under the limit and still be refused if the figure is taken unzipped.
How do I set the clickTag for Quantcast?
Declare clickTag in the creative. Quantcast replaces the value when the ad is trafficked, so exporting with an empty destination is normal and correct.
Can a Quantcast banner have more than one clickable link?
No. Quantcast takes a single click destination for the whole banner, so every click goes to the same page regardless of which element was clicked.

Other platforms

Compare every platform side by side, or produce a Quantcast-ready bundle from an approved Figma design with Foldwrap.