What is online advertising?

Ever noticed a striking banner above or next to a news article? That’s online advertising with banners. It’s a smart way to make your business, product, or promotion visible on thousands of popular websites in the Netherlands, Belgium, or beyond.

With UpStreamAds, you can get started right away without expensive agencies. You set your own budget, target audience, and where your ads appear. Whether you run a local shop or a national brand, your banner will show up at just the right time.

Start advertising now

Why choose UpStreamAds?

Your banners go live within 1 day
Low entry: starting from just €5 per day
Full performance insights via our dashboard
You choose the region, audience, and websites

How do I start with online advertising?

Get your campaign up and running in just a few simple steps

Online advertising step by step

You can start a campaign for any budget. Follow the steps below and start advertising right away.

Create a free account in our client portal

You will receive a welcome email with a button to confirm your account.

Confirm your account and log in

Once your account is confirmed, you can fill in your company details.

Create a banner set

Use your own banners or choose from our template. More information on using your own banners can be found here. Banner sets can be used for multiple campaigns.

Get the banners approved

Banner sets must be approved to avoid any issues with copyright holders. A fee of 10 euros is charged for the approval of a banner set.

We are now working on your request. You will receive an email when your banners are approved.
In the meantime, you can proceed with the next steps.

Book your campaign

Create a campaign with your banner set. Choose targeting, budget, schedule, and duration. Ready? Then you can pay via iDeal, PayPal, or another available payment method.

Start your campaign

When everything is ready, you can start your campaign. Our systems will get to work and serve your banners within your targeting. Your banners will now be displayed.

All done!

Your campaign will be automatically submitted to various websites. We monitor all ongoing campaigns. You can track the progress of your campaign via our online client portal or receive PDF reports via email.

Just to mention: apart from the approval fee for a banner set and your daily budget, you pay absolutely nothing! We do not charge any hosting, communication, or monitoring fees.

If you encounter issues creating a campaign or have any questions, feel free to contact us.

Changes?

Want to pause, extend, or adjust your campaign budgets? Modify your campaign, and the changes will be applied.

Popular websites for advertising

We offer advertising on many different websites, including popular platforms like Marktplaats.nl, Tweedehands.nl, websites and apps of national and regional newspapers, and NU.nl. For a full list of websites where you can advertise, check out the websites page.

Supported Banner Formats

Upload your banners in one of the formats below. We support JPG, PNG and GIF files.

Category	Example	Resolutions (in pixels)
Square and rectangle		300×250, 250×250, 320×320, 336×280
Skyscraper		300×600, 160×600, 120×600, 300×1050
Mobile		320×100, 300×50, 300×100, 320×50, 320×480, 360×592, 360×640, 375×667
Leaderboard		728×90, 970×250, 468×60, 800×250, 970×90

Note: Only images with the correct dimensions and resolution will be accepted.

HTML5 Banners

HTML5 banners offer maximum flexibility and creative possibilities across all standard formats. Thanks to animations, interactivity and visual effects, you capture your audience’s attention more effectively than with static banners.

Submission requirements

One ZIP file per format containing all necessary files
The banner must be placed in banner.html
The resolution (width × height) must be included in the <meta> tags of the HTML
Maximum file size is 250 KB including all assets (HTML, CSS, JS, images, fonts)

What is allowed?

Autoplay of animations is allowed, as long as there is no audio
Videos are allowed within the file size limit
Using animation libraries such as GSAP or Anime.js is allowed and recommended for smooth transitions
External JavaScript files may be used, but will be manually reviewed
If misuse or unsafe scripts are detected, the campaign will be stopped immediately

Benefits of HTML5 banners

Animated banners attract attention faster and offer more room to tell a story or display multiple messages. They are ideal for campaigns focused on conversion, engagement or brand experience.

Whether you’re running a sales campaign or working on brand awareness – with HTML5 banners, you can tailor your message exactly to your campaign’s objective.

TIP! We have a sample banner set available using GSAP, which we’re happy to share.

Do you have questions or want to discuss the possibilities? Feel free to contact us.