Accessible web for everyone

As a web accessibility consultant, I help make your digital products more inclusive and easier to use. I identify barriers, implement practical solutions, and integrate accessibility into your workflows - from quick checks and in-depth audits to process support and accessible frontend development.

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Portrait of Katrin Sellerbeck. She looks friendly into the camera and wears a dark red blouse.

Services

Strategy & Consulting

I provide guidance on all aspects of web accessibility. Together we build a practical strategy to meet legal requirements such as the EAA, BFSG or other local regulations.

Accessibility Checks & Audits

From an initial quick check to a full audit: I evaluate your digital products against EN 301 549 / WCAG and recommend practical, prioritized improvements.

Process Support

Accessibility works best when it is integrated early. I accompany your project interdisciplinarily from first concept to final product and help embed accessibility sustainably in your workflows.

Design Review

I review your design and interaction concepts against recognized accessibility standards so experiences become clearer, more inclusive, and easier to use.

Accessible Frontend Development

When needed, I contribute hands-on to accessible frontend implementation with modern, robust technologies, or provide focused code reviews for your team.

Training & Workshops

I offer tailored workshops for developers, designers, and content teams in English or German to build practical accessibility skills.

What clients say

Note: Client feedback is partially in German and English.

Ich hatte das große Vergnügen, drei Jahre lang mit Katrin zusammenzuarbeiten. Sie war in ihrer Funktion als Fronend-Entwicklerin mit Sicherheit eine der gewissenhaftesten Personen, die ich kennenlernen durfte. Ihre Genauigkeit und das Engagement im Dienste der Qualität ihrer Arbeit waren beispiellos. Sie ist außerdem sehr gut in den Bereichen Planung und Organisation, behält auch in komplexen Projekten stets den Überblick und sorgt dafür, dass alles reibungslos abläuft. Ihre Expertise im Bereich der Barrierefreiheit hat nicht nur die Qualität unserer Arbeit auf ein neues Level gehoben, sondern auch das Bewusstsein des gesamten Teams für dieses uns schon immer sehr wichtige Thema nochmals geschärft.

Uwe Viehmann Managing Director & Partner @ :HENKELHIEDL

The "Ally for Web Developers" workshop was engaging, insightful, and well-equipped with valuable resources. The concepts were easy to grasp, offering practical insights that could be easily applied without overwhelming us with unnecessary details. Thank you Katrin!

David Lampe Product Lead @ innn.it

Ich habe mit Katrin in verschiedenen Development-Projekten zusammengearbeitet und dabei ihre direkte, konstruktive Art sehr geschätzt - immer offen für unterschiedliche Lösungsansätze. Besonders hervorheben möchte ich ihre Gewissenhaftigkeit bei der technischen Umsetzung und der Dokumentation. Ihre fundierte Expertise im Bereich digitale Barrierefreiheit war ein echter Mehrwert für unsere Zusammenarbeit.

Anna K IT-Projektmanagerin @ :HENKELHIEDL

In der langjährigen Zusammenarbeit mit Frau Sellerbeck in der Betreuung meiner unterschiedlichen Websites, schätze ich sehr, die fachliche sowie die soziale Professionalität, auch in schwierigen Situationen.

Manfred Brandstätter Geschäftsführer @ Die Organisationsgestalter

About

A modern desk with a galactic desk mat, laptop, keyboard, trackpad, mouse, and a glass sphere.

I am a freelance IT consultant and web developer focused on web accessibility, and a member of the International Association of Accessibility Professionals (IAAP(opens in a new tab)).

As a child, I wanted to become an astronaut. The quest for strange new worlds eventually led me into design and then web development, where I have worked for more than 20 years. During that time, I helped many clients deliver web projects from first idea to finished product, including implementation, deployment, maintenance, and long-running product support.

Since 2021, I have specialized in web accessibility: accessible frontend development, process support, audits, and workshops. My focus is practical clarity - making technology understandable and usable for people with diverse abilities, and for teams who take inclusion seriously. To me, accessibility is not an add-on, but a core quality of modern products.

I welcome new projects and inquiries, especially those with social, sustainable, or artistic ambitions.

My expertise

I work regularly with the following topics and technologies:

HTML CSS WCAG WAI-ARIA Inclusive Design JavaScript Vue.js Astro Storybook Typo3 Wordpress Statamic Magnolia Strapi Jira Balsamiq Figma

Sounds good? Let us talk.

Book a free initial consultation. I will assess your situation, share an expert perspective, and outline practical first steps.

Book a free initial consultation(opens in a new tab)