Use JSON as the complete archive
Structured data is the safest base for future migrations and scripts.
Use Markdown for durable notes
Readable files work well with Git, Obsidian, and plain-text search.
Test restores, not only downloads
Open the export, inspect encoding and links, and confirm the fields you care about are present.
Questions
Are X bookmarks private?
X describes bookmarks and bookmark folders as private. Talon also keeps imported library content private by default.
Does Talon post to my X account?
No publishing permission is required for the core bookmark library workflow.