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File crashes Excel!!

Save my workbook!
The best tool for salvaging problematic workbooks.


Excel VBA Masterclass (English)
Excel VBA for Financials (Dutch)

Third party tools

Speed up your file

The best tool to optimise your Excel model!

Repair your file

Stellar Phoenix Excel Repair
Best tool to repair corrupt Excel sheets and objects

Your Excel Expert; uw Excel specialist

Welcome to the website of

JKP Application Development Services.

If you are looking for an Excel specialist and an Excel and VBA expert you've come to the right place.

My core business is developing solutions using Microsoft Excel/VBA and Access/VBA. Integration with other (Office) programs is possible.

Need expert Excel help? Get in touch.

My Services page lists some example projects.

Need Excel or VBA training? Information about our Excel and VBA trainings can be found on our trainings page.

If you need more information about me, look at my English homepage.

To find out whether you've actually found an Excel expert, I invite you to browse through my Excel articles.

I also recommend to try my free utilities.

Click here for remote assistanceClick for remote assistance

Welkom op de website van

JKP Application Development Services.

Als u op zoek bent naar een echte Excel specialist en een Excel en VBA expert dan bent u aan het juiste adres.

De nadruk ligt op het ontwikkelen van toepassingen in Microsoft Excel/VBA en Microsoft Access/VBA. Ook integratie met andere (Office) programma's is mogelijk.

Kunt u de hulp van een Excel expert gebruiken? Neem dan contact op.

Op de Diensten pagina vind u voorbeelden van projecten.

Zoekt u Excel of VBA cursussen? Informatie over onze Excel en VBA trainingen kunt u op onze training pagina vinden.

Wilt u meer over mij weten ga dan naar mijn Nederlandse homepage.

Wilt u zelf beoordelen of u een echte Excel expert heeft gevonden, bekijk dan mijn Excel artikelen.

Probeer ook eens mijn gratis hulpprogramma's.

Klik hier voor hulp op afstandKlik voor hulp of afstand


What's new on this site:

(English and/or Dutch content)

Nieuw op deze site

(Engelse en/of Nederlandse artikelen)

Update: Name Manager
Name Manager has just been updated to build 660. In case of a compile error, Name Manager will automatically turn off its feature to display a toolbar in the VBA editor.
Tue, 04 Sep 2018 16:00:00 GMT

Update: Name Manager
Name Manager has just been updated to build 659. Fixed a problem 64 bit Excel users might experience.
Mon, 03 Sep 2018 16:35:00 GMT

Update: HeaderFooter
My HeaderFooter tool has been made 64 bit compliant.
Fri, 24 Aug 2018 14:05:00 GMT

Update: Name Manager
Name Manager has just been updated to build 958. Fixed a problem caused by a Windows 10 bug.
Fri, 06 Jul 2018 14:05:00 GMT

Update: RefTreeAnalyser
RefTreeAnalyser 2.0 has just been updated. Improved performance of formula checking and reporting significantly.
Thu, 14 Jun 2018 19:05:00 GMT

Update: Privacy Beleid JKP-ADS
Il weet het, saaaaai. Maar het moest er van komen ivm de AVG. Ons Privacy Beleid is aan onze site toegevoegd.
Mon, 28 May 2018 10:25:00 GMT

Update: Company Privacy Policy
I know, boring, but it had to be done thanks to the GDPR. Our Company Privacy Policy has been added to our website.
Mon, 28 May 2018 10:25:00 GMT

Update: RefTreeAnalyser
RefTreeAnalyser 2.0 has just been updated. Adapted site addresses to use https.
Thu, 24 May 2018 16:15:00 GMT