Seznam Sklik HTML5 Banner ad specs

Seznam Sklik HTML5 Banner ads are HTML5 creatives, up to 0.25 MB per file, delivered as ZIP. They run in the Seznam.cz and the Sklik content network · Display banner (HTML5) placement on Seznam Sklik.

250 KB

Test a creative

Visual

Max file size: 250 KB
File types: ZIP

Notes & source

One ZIP with a single HTML file plus its assets (HTM, HTML, CSS, JS, GIF, PNG, JPG, SVG, fonts, JSON, TXT, XML, WebP, AVIF)
No ZIPs inside the ZIP
Not interactive or expanding
No video
One destination URL set in Sklik (no window.open, Enabler.exit or mraid.open)
External resources only from Sklik’s HTTPS whitelist (Google Fonts, jQuery, Adform, GSAP, CreateJS, Lottie and a few others)
HTML5 is available only to accounts active for at least a month with at least 20,000 CZK monthly spend
It cannot be used as Branding
Sklik’s Types of Ads overview gives 200 kB for HTML5
Its rules pages (English and Czech) give 250 kB, which is used here

Official source (opens in a new tab) · checked not yet

Frequently asked questions

What is the Seznam Sklik HTML5 Banner ad format?

Seznam Sklik HTML5 Banner is an HTML5 ad format that runs in the Seznam.cz and the Sklik content network · Display banner (HTML5) placement on Seznam Sklik. This page lists its creative requirements, taken from Seznam Sklik’s official spec documentation.

What sizes does Seznam Sklik HTML5 Banner use?

Seznam Sklik HTML5 Banner uses 160×600, 300×600, 300×300, 480×480, 300×250, 320×100, 480×300, 728×90, 970×210, 970×310 and 500×200 pixels.

What is the maximum file size for Seznam Sklik HTML5 Banner?

Files for Seznam Sklik HTML5 Banner can be up to 250 kB.

Which file formats does Seznam Sklik HTML5 Banner accept?

Seznam Sklik HTML5 Banner accepts ZIP files.

Where can I find the official Seznam Sklik HTML5 Banner documentation?

The official source for Seznam Sklik HTML5 Banner requirements is https://napoveda.sklik.cz/pravidla/html5-bannery/, linked from this page.