Doorontwikkeling

Speeding up your website

Make a slow site fast again. Images, scripts, fonts, and structure—measured and optimized.

Search Console is reporting Core Web Vitals issues, the site feels sluggish on mobile, and no one knows which of the ten added scripts is to blame.

Does this sound familiar?

Tell me what isn't working or what's taking up too much of your time, and I'll let you know what I would do and roughly what it would cost. You'll be speaking directly to me, not an account manager.

Dorus van Keulen from DeDigitaal
Dorus van Keulen
DeDigitaal, Nijmegen

Performance optimization makes a slow site fast again. Sites slow down over time: a new script is added, images get larger, an embed hangs, or an animation does too much. We measure where the time is being lost and tackle the biggest wins first. Measurable results, before and after.

When you need this

Google Search Console is reporting Core Web Vitals issues. Visitors are leaving before the page finishes loading. The site feels sluggish on mobile. Over time, you’ve added tools—chat, analytics, video—without checking the performance cost. Or, you simply want to know how your site is performing.

What we do

We measure using Lighthouse and real user data from Search Console. Then, we tackle the biggest wins first. Images: correct format, modern compression, and lazy loading. Scripts: load only when needed, defer non-urgent tasks, and remove unused code. Fonts: non-blocking, loading only the weights the site uses. Animations: offloaded to the GPU, not the main thread. Embeds: videos and maps loaded only upon interaction. And structure: leaner DOM and CSS.

Our approach

We start with a baseline measurement for each page type, provide a list of planned adjustments and their expected impact, implement the changes, and then perform a follow-up measurement. We test on staging and only go live once the performance gains are confirmed. For Webflow sites, we also review the build structure, as that is often a factor in site speed.

What you get

A report showing before-and-after results, a list of what was adjusted and why, and advice on how to maintain performance—such as avoiding oversized image uploads and measuring the impact of new scripts before adding them. This is usually part of a continuous development subscription.

Costs and timeline

The initial measurement determines the scope. You then receive a fixed price for the list of adjustments. This is typically covered under a continuous development subscription.

When it's not for you

If the slowness is caused by the platform or hosting rather than the site itself, optimization won't help much, and migrating is the better investment. This will be clear from the initial measurement.

Where we've done it

During the migration of Immerse Education PageSpeed medians increased and CLS dropped to zero. External scripts there only load upon the first interaction, without losing any integrations.

Read more

Migrating from WordPress: WordPress migration. Keeping your site healthy: maintenance and security.

How can we help? 

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DeDigitaal Clients

frequently asked questions

Questions about

Performance optimization

How much does performance optimization cost?

A measurement with a list of improvements takes a day. The adjustments take one to three days, depending on the site. Fixed price upfront.

How much faster will the site be after performance optimization?

That depends on where you start. We don't promise a score, we show you the measurement.

Does performance optimization help SEO?

Speed is a ranking factor and Core Web Vitals count. More importantly, visitors stay longer and convert more often.

Can we do performance optimization ourselves?

Resizing images before uploading and not adding unnecessary scripts: yes. The rest requires knowledge of how the site is built.

Is performance optimization possible if the site isn't on Webflow?

Then we measure and advise. The changes are made by your own developer, or by us if it is a platform we know.