Crossposter – free cross-posting browser extension for X, Bluesky, LinkedIn, Instagram, Threads, Facebook & Substack

Crossposter is a free, open-source browser extension that cross-posts any social media post – text, images and video – between X, Bluesky, LinkedIn, Instagram, Threads, Facebook, Substack and UpScrolled. Runs locally in Chrome or Firefox: no account connections, no third-party service, works with p…