I’m looking for a message backup solution

my iCloud is almost full, most messages

I don’t want to remove them completely

so I would like to download all the messages from my phone

and put them in some web application that will allow me to view them

so I’m probably looking for two apps, one that downloads iOS messages to my PC/Mac and some sort of web app (preferably self-hosted) that will display them and allow searching

then i can set auto delete of messages older than one year

can you recommend anything?