A jailbroken Kindle can now receive files wirelessly via Google's Quick Share protocol. Developer unrealJune built KindShare, a plugin for KOReader that implements Quick Share receive functionality on Kindle hardware. The project requires a jailbroken device running Kindle Unified Application Launcher, KOReader, SSH access, and a build environment with Go and Docker.
The implementation is receive-only: you push files to the Kindle, not from it. Two details matter here. First, the Kindle auto-accepts incoming files with no confirmation prompt, a real security consideration on open networks. Second, when no external network is available, the Kindle can broadcast its own access point to accept transfers directly.
The full write-up on GitHub walks through compilation, plugin installation, and the protocol internals, which is where the real value is. Quick Share has been a closed-ecosystem tool, so an open-source implementation is worth examining in detail. Between-device file transfer remains a fragmented, ugly problem, and this is one of the few projects attacking it from outside the platform vendor's walled garden.
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