SMS Import / Export app
SMS Import / Export imports and exports SMS and MMS messages, call logs, and contacts from and to JSON files. (Contacts import and export are currently functional but considered experimental.) It does not require root.The primary author of SMS Import / Export is Thomas More. Others have contributed code and translations. The software is copyright 2021-2022, and is released under the GNU General Public Licence version 3.
Homepage: https://github.com/tmo1/sms-ie
Documentation: https://github.com/tmo1/sms-ie#readme
Issue tracker: https://github.com/tmo1/sms-ie/issues
SMS Import / Export is a sibling project to sms-db, a Linux tool to build an SQLite database out of collections of SMS and MMS messages in various formats. sms-db can import JSON files created by SMS Import / Export, and it can export its database to JSON files that can be imported by SMS Import / Export.