What I'm looking for is a VCF editor that would display .vcf files in more readable form than plain text editor.
Query functions, required by Query-based editor for VCard files (Linux) are not necessary for me.
I am not interested in webapps.
It turns out that Kontact, available as
kontact Ubuntu package works well and is able to export this data into various formats. This is quite useful, as it turns out it is much easier to find Android program that will add contacts provided as a .csv file rather than one using vCard file.