Technical SEO

Make your website perform for the full 100%

Technical SEO is the foundation of your findability. Google and other search engines use crawlers to value your website. Although they are powered by very clever algorithms, they are basically quite simple things. So you need to give them proper directions on your website, otherwise it will come at the expense of your website's findability.

After our technical SEO analysis, you will have a clear overview of the areas for improvement to optimise the technical basis of your website. Wondering how your website is performing technically? Then request a technical SEO check right away!

Technical seo image

Why technical SEO?

Search engines like Google use crawlers to assess your website. These crawlers, although powered by sophisticated algorithms, are essentially quite simple. Therefore, it is crucial to guide them properly on your website to optimise its findability.

Technical SEO optimisation: thorough website analysis

Our website technology analysis covers everything your web builder may have overlooked. While the foundation for a high-scoring website is laid at the time of construction, web builders don't always pay attention to SEO techniques. We therefore look at the technical aspects of your website and assess whether they meet the standards of technical SEO.

A common technical problem we encounter is the speed of a website, which is why this is a major focus of our technical SEO analysis. Moreover, nowadays a website needs to function properly on different mobile devices, we include this too.

Our technical SEO checklist contains 60 technical points to improve your website. Upon completion, you will receive a comprehensive technical SEO checklist and a clear report so you know what you need to improve on your website.

Working method of our technical SEO specialists

The technical SEO specialists always include several key points in our technical SEO check:

  • Page crawlability: can all relevant pages be found by the crawlers? For this, you onder other need a good sitemap, a solid link structure and the robots.txt file must be in order. We also check redirects and possible 404 errors.
  • Content indexability: we check whether your website content is optimally 'readable' by crawlbots.
Crawling, technical SEO
technical seo structured data
  • Structured data: this is a way of labelling certain content for bots. For example, a phone number, which zonder structured data is just a string of numbers for a crawlbot.
  • OpenGraph and images: We check whether your website properly uses OpenGraph tags to optimise content sharing on social media. We also analyse the optimisation of images on your site, including their size, alt-texts and whether they appear correctly in the sitemap.

After going through these and more points, you will receive a detailed technical SEO checklist. We also point out the points with the greatest potential, so you know where to start.

We also point out the points with the greatest potential, so you know where to start.

Technical SEO and migration

When planning a new website, it is crucial to pay attention to technical SEO optimisation from the start. A thorough SEO migration minimises the risk of losing search results and ensures that all technical points are in order when going live.

What is technical SEO?

Technical SEO includes all the optimisations that ensure search engines like Google can easily crawl and index your website. It includes onder other aspects like website speed, mobile usability, XML sitemaps, and structured data.

Find out more about technical SEO

Find out about the technical SEO features of your website? Then get in touch with us! A good technical state, ensures higher conversions. Conversion optimisation is therefore also related to technical SEO. Want to know how? Or if you want to know a bit more about it first, we will be very happy to tell you.

These customers are supupside down from us!

Renzo van Dongen

Renzo van Dongen

Digital content manager Peugeot

Whether it's about content or technical adjustments, it doesn't matter. Martijn briefs this in a very clear way so that it can be implemented locally or by our head office in France. [...] Since the start of our collaboration, we have achieved great results. Keep it up!

Marien van Stegeren

Eigenaar Kitcentrum

When your online onder venture grows, expectations often grow too, in every area. To a large extent, we were in control of SEO and its interpretation ourselves. We found out that our own "general view" was no longer sufficient, so we engaged Bureau Onder. Surprising and clear. We have built up a fine collaboration, partly because Martijn also regularly visits our office with Eline or Mariska (depending on the case), which is very valuable to us!

Marten Stellingwerf


Martijn and Mariska make the SEO story understandable for the layman and are happy to think along with us. It is nice that there is a personal contact moment every month with an extensive report and the opportunity to talk everything through. After just a few months, Onder has already managed to achieve number 1 positions on Google with some of our webshop pages. We are very satisfied with Onder.

Mark Prummel

SEO Specialist Stella Fietsen

For several years, Onder has been a valued partner of Stella. Martijn is my sparring partner for complex SEO issues and the extra pair of critical eyes that keeps us on our toes. Together, we have achieved nice growth in online visibility, visitor numbers and leads. Onder onder stands out for its short lines of communication and professionalism. They speak our language: don't nag, get down to business. That is what we love!

This is us!

A team of SEO specialists

Our team consists of enthusiastic SEO specialists who are happy to work with you for the best results.

Meet our team

Any questions?

Do you want to know more about SEO? Could your website use a new boost?
Get in touch


Don't miss a single SEO insight
  • Insights on SEO
  • For beginners and advanced specialists
  • From experiments to developments at Google and from
    best practices to our own cases
  • A look behind the scenes at Onder

"*" indicates required fields

This field is for validation purposes and should be left unchanged.