Campaign Manager 360 HTML5 banner specs

Google's ad server for agencies. Hosts and measures the creative across publishers; the trafficker assigns each click destination after upload.

Limits unverified — this page shows only what we can citeFoldwrap exports to Campaign Manager 360

Also known as CM360, Campaign Manager, DCM, DoubleClick Campaign Manager.

Check a ZIP against Campaign Manager 360 Export a bundle for Campaign Manager 360

Campaign Manager 360 banner requirements

Category	Ad server
Regions	GLOBAL
Maximum ZIP size	10 MB zipped
Maximum files in the ZIP	100
Entry file	index.html
Ad size meta tag	Optional
Secure references	Every external reference must be served over HTTPS
Click method	clickTag variable
Click variable	clickTag
Click URL at export	Left empty — the platform sets it when the ad is trafficked
Multiple click destinations	One click area per banner

Fields Campaign Manager 360 does not publish, or that we have not yet read from a primary document, are left off this table rather than filled with a plausible number.

Official requirements

Campaign Manager 360 clickTag code

This is the click declaration Foldwrap writes into an HTML5 export for Campaign Manager 360, with a placeholder destination. Copy it into your own creative if you are hand-building the banner.

Campaign Manager 360 clickTag

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

Campaign Manager 360 sets the destination at trafficking time, so an empty value in the exported file is correct and expected.

Why Campaign Manager 360 rejects a banner

These are the rules Foldwrap checks a package against before it is delivered to Campaign Manager 360. Each is derived from the requirements above, so a constraint Campaign Manager 360 does not state is not checked and is not listed.

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 filesCombine sprites, inline small assets, or remove unused files.
errorUnsupported code found
warningElement destinations flatten hereKeep a target that supports element destinations in the set, or set a default click URL that suits every element.
warningNested archive detectedUnpack the inner archive and re-zip a single creative.

Foldwrap runs these checks on every package it exports for Campaign Manager 360, 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.

Maximum size: 10 MB
support.google.com · retrieved 18 September 2026
Maximum size: 10 MB
support.google.com · retrieved 18 September 2026 · likely
Maximum number of files per .zip: 100
support.google.com · retrieved 18 September 2026
Make sure your creative uses the click tag variable as the click destination.
support.google.com · retrieved 18 September 2026
Creatives only allow secure URLs in creative code, in manually added impression pixel or survey URLs, and in redirect URLs.
support.google.com · retrieved 20 September 2026
Campaign Manager 360 does not accept HTML5 assets that use local storage or session storage.
support.google.com · retrieved 20 September 2026

Frequently asked

What is the maximum file size for a Campaign Manager 360 HTML5 banner?

Campaign Manager 360 accepts an HTML5 package up to 10 MB 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 Campaign Manager 360?

Declare clickTag in the creative. Campaign Manager 360 replaces the value when the ad is trafficked, so exporting with an empty destination is normal and correct.

Can a Campaign Manager 360 banner have more than one clickable link?

No. Campaign Manager 360 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 Campaign Manager 360-ready bundle from an approved Figma design with Foldwrap.