What it does
Instant.io is a WebTorrent-based browser utility for seeding files and downloading through a magnet link or info hash.
Drag a file onto the sending side to seed it, or enter a magnet link on the receiving side. Instant.io is useful for demonstrating a browser torrent handover without a separate desktop torrent client. Its own page distinguishes this simple streaming transfer from Wormhole's additional encryption and persistent-link features; do not apply those features to Instant.io.
Strengths
- Browser seeding and magnet-link downloading
- Open-source implementation
Best for
- WebTorrent-based browser transfers
Sources
- Instant.io - Streaming file transfer over WebTorrent (Oct 26, 2026)