Yes that could be done with some limitations.
The category structure will not be transfered.
Images are exported as path to the file. so you would have to copy them
somewhere you can reach them from the new page and maybe change the path
in the CSV file.
Some minor fields might not be transfered.

It's bad for business but I give you an other idea:
1. make a full backup of both pages
2. update K2 on Joomla 2.5 to the same version as on J3.3
3. export all k2_* tables via phpmyadmin from J2.5
4. import all this tables to J3.3

Individual IT wrote: If the export does not give an option to convert to UTF8 you can try to import as it is or try to convert it with an external tool (like libreoffice) or convert to UTF8 during import, there is an option for that.

Your first problem is the separator and the encloser. to change that do:
1. Download and Install LibreOffice
2. Open the CSV with LibreOffice
3. check the values are correct
4. Go to File-Save As
5. Select folder and file name
6. select Text-CSV as format
7. check the "Edit filter Settings" box
8. click "Save"
9. select , as field delimiter and " as text-delimiter
10. click OK
11. open the saved file with a text editor and double check it
12. try to import the file

BEFORE EVEN TRYING TO IMPORT MAKE A FULL BACKUP OF YOUR DATABASE AND JOOMLA FILES

Thanks for your support. :)

Thank you for the reply. I am trying to figure out which route I will go.

I've just published new versions of the tool with small bug fixes.

To get it use the download link you got after buying the extension, if that one is still valid or buy it again: www.individual-it.net/en/Joomla/#27

Check the ratings at JED and rate it yourself: extensions.joomla.org/extensions/extension-specific/k2-extensions/12408

Hi!

I have exported my items from one of my sites and now want to import it on my other site, i choose my csv file and hit import. So far so good, but when i get to the step were i should associate the fields, i can't choose any fields in the drop downs, it shows blank, and if i choose to continue all the imported items are blank and have the title "Imported item".

Hope you could help me with this asap

Please edit the CSV file with a simple text-browser and check the format.
You need , as field delimiter and " as text-delimiter.

Its best to use LibreOffice for editing the CSV. check the comment of Gabriel getk2.org/community/English-K2-Community/1546-Tool-for-importing--exporting-items-to--from-K2?limit=30&start=210#194102

Thanks, everything seems to work now except for the images, have tried to move those manually but it dosent help :(

Hi,
I'm sorry to hear you got problems.
Can you please tell us how you tried to transfer the images, so we can help.

I'm having problems with migration from 2 sites in joomla 1.5, you could help, if necessary, could spend data management sites.

Hi,
what problems do you have?
Please report also what version of the K2 Import tool you are using.