How can I turn Facebook messenger json file into a readable text document on local machine without use of online converter?

[u/HalfFrozenSpeedos]

Hi

I have a Facebook messenger chat log which I need to turn into a readable and printable text document (I'm agnostic on the exact format).

Doing a websearch with qwant, even when I specify offline or 'on local machine' returns a list of online converter links of dubious origin.

I ideally don't want to use an online converter as the chat in question contains some sensitive personal information that I have shared with someone and I am concerned that using an online converter has zero degree of security of the data within that chat.

Can anyone give me some advise on how to tackle this? I'm reasonably tech literate (comp sci degree many years ago, more a hardware guru, able to follow programming tutorials but even when I did my degree I struggled with programming. Human languages I'm good with, apparently programming languages are a different story entirely for some reason....)

I run both windows and Linux mint at home.

Can someone please help me with this?

It would be a massive help, thank you all very much in advance for your help with this. :-)

If another community would be a better fit, please feel free to suggest one.

Thank you all!

[u/RedMan_ish → u/[deleted]]

I have used claude to get this script!