About me

Jörg Dennis Krüger

The Conversion Hacker. I see where a shop loses buyers and make sure it sells more.

Book a Dropoff Analysis with Jörg

I'll show you where your shop loses buyers.

Jörg Dennis Krüger on stage at OMKB
On stage at OMKB

Jörg Dennis Krüger

The Conversion Hacker®, founder of JDKRUEGER&CO

For 20 years I have turned visitors into buyers. First at large companies, today for owner-led online shops. I am one of the pioneers of conversion optimisation in Germany (Computerwoche).

  • QUISMAA GroupM agency. I built its conversion optimisation unit.
  • BookMy book “Conversion Boosting mit Website Testing” is published by mitp.
  • SixtResponsible for the websites, including sixt.com and sixt.de.
  • RegiondoHead of product marketing, performance marketing and conversion optimisation.
  • TodayJDKRUEGER&CO, which I founded.

More about Jörg Dennis Krüger

And your AI?

AI is our tool too. I make the call.

With AI your team gets a draft in an afternoon. It rarely goes live. More revenue starts before the change: with the decision on what comes first. I make the call.

How we weigh your AI ideas

Companies I have worked for

  • CosmosDirekt
  • Shirtinator
  • Cotton Ballon
  • Geschenke24
  • Kettner Edelmetalle
  • Gutta Shop
  • Rockstar Nails
  • Vioneers

When I step in

Five situations where I step in.

01

The shop sells less than it should.

Visitors come, too few buy, even after the relaunch, and nobody can say exactly why. I walk the purchase path like your customers, put the numbers next to it and find where buyers drop off. Then I clear them out of the way.

02

Your team cannot keep up.

The idea list grows, a fraction gets built. I take your list, sort it with you by revenue impact and get it done, from one hand, without briefing loops. You decide, your team stays on daily business.

03

The e-commerce role is open.

Finding and onboarding someone takes months. We keep shop and team running and hand over to your new person when they arrive. We get changes live fast. What is realistic for your shop, we discuss in the call.

04

Agencies moved little.

Reports and meetings, revenue barely changed. With me nobody sits in between. You talk directly to the person who decides and delivers.

05

The shop is considered fully tested.

Tests check ideas someone already had. I start earlier: which products carry the revenue, and do range and prices fit?

Your situation is not listed?

Smaller shops too. Show me your shop.

Book a call

The awards that matter most

What we measured

Geschenke24 €250k to over €1M Monthly revenue before and after. Growth had stalled; the purchase path was rebuilt and every step measured.
Cotton Ballon +120 % Conversion rate in two weeks
Rockstar Nails +20 % Revenue in 30 days Kettner Edelmetalle +25 % Revenue through trust optimisation Gutta Shop +30 % Conversions
Vioneers 15 % Landing page conversion rate at launch
Book cover Conversion Boosting mit Website Testing

The book

Conversion Boosting mit Website Testing

The pioneering German book on A/B testing (mitp, 2011). Practice, not theory.

View on Amazon

Author, speaker, podcast host

Podcast. Conferences. Expert community.

Podcast

Der Conversion Hacker®

Since 2021. Short episodes on CRO, A/B testing and e-commerce, in German.

To the podcast

Conferences

OMR · DMEXCO · OMKB

Speaker at leading digital conferences such as OMR and DMEXCO.

Speaker topics

Content

1,000+ articles

One of the most-read CRO authors in the German-speaking market.

All insights

System or person?

Both. I pick and sign off every change, and what works goes live.

The company

JDKRUEGER&CO

How we work

The person

Jörg Dennis Krüger

Press, bios and photos

Awarded and in print

Stevie Award trophy

4× Gold

German Stevie Awards

2021, 2022, 2023, 2025: most innovative company, thinkCONVERSION®, the BIOvative online shop, company of the year.

German Web Awards

2× Winner

German Web Award

Twice in a row, among more than 2,000 agencies from Germany, Austria and Switzerland.

Top Experte, Erfolg Magazin

Top Experte

Erfolg Magazin

Online shop optimisation. Awarded again every year.

Stevie Award trophyGold

One of the 4× Gold: Best E-Commerce Site

Gold for the online shop JDKRUEGER&CO built for BIOvative.

Concept, design and build came from JDKRUEGER&CO. The German Stevie Awards jury named it the best e-commerce site.

Book cover Conversion Boosting mit Website Testing

Book

Conversion Boosting mit Website Testing

Jörg Dennis Krüger, mitp. Reviewed by heise.

Before that, two books on web content management.

As seen in

HORIZONTheiset3nInternet World BusinessFOCUSComputerwocheADZINEOnlineMarketing.deAGITANOSHIFT/CXIHK Wirtschaftsmagazin

Speaker

Internet World ExpoOMRDMEXCOOMKBDigital Marketing ForumCONTRAMarketing on Tour

What clients say

Video, 50 seconds

“I believe he is the right man when it comes to pushing online sales.”
Jochen SchweizerEntrepreneur and investor, known from “Die Höhle der Löwen”, the German Dragons’ Den
“The new shop is live, a good two weeks ahead of schedule. Great work!”
Jerg-Hanns WohnhasManaging Director, Canuana
“I believe he is the right man when it comes to pushing online sales.”
Jochen SchweizerEntrepreneur and investor, known from “Die Höhle der Löwen”, the German Dragons’ Den
“Your drive, the precision in communication and the way you pick up our thoughts and turn them into concrete ideas and well-thought-out concepts is something we rarely experience with external partners.”
Toni LöscheManaging Director, Wunderwunsch
“Much more traffic, and conversion stays stable.”
Daniel DebusCotton Ballon
“I can recommend this to every shop owner.”
Alex AmannReview on Trustpilot
“Dennis gives perfect advice.”
Alexander MattauschReview on Trustpilot

Let’s start with your shop.

In the Dropoff Analysis you see where your shop loses buyers. Afterwards you know where the first step pays off.