Grid values - creating a report from the datas

[swacsa]

After the users filled the survey I want to create a report of the results.
But the grid field datas are in one field now, in a specific format:

[{"title":"Piknik a kopaszin","columns":[{"title":"Nem tetszik","value":true},{"title":"Kicsit tetszik","value":false},{"title":"Tetszik","value":false},{"title":"Nagyon tetszik","value":false}]},{"title":"Hétvégi túra és bográcsozás a budai hegyekben","columns":[{"title":"Nem tetszik","value":false},{"title":"Kicsit tetszik","value":false},{"title":"Tetszik","value":false},{"title":"Nagyon tetszik","value":true}]},{"title":"Hétvégi ....ect.

It should be some script / app / anything which can help for read and use these datas.