CheezyPizza

CheezyPizza (fork of FilePizza) is a free, open-source peer-to-peer file transfer tool that runs entirely in your browser — no installs, no accounts, no servers holding your data. Features:

1. Resumable downloads: Transfers interrupted by network drops, browser crashes, or manual pauses can be resumed from where they left off. Progress is persisted to OPFS or IndexedDB so no data is re-downloaded unnecessarily.
2. SHA-256 file integrity verification: Every file is hashed by the uploader after transfer and verified by the downloader. A mismatch flags the file as corrupt before it is ever saved to disk.
3. Large file support: Files are written incrementally to the Origin Private File System (OPFS) or IndexedDB as chunks arrive, with automatic fallback between the two, allowing transfers well beyond what fits in memory.
4. Better error handling: Per-file errors are tracked independently. A failed or corrupt file does not block other files in a multi-file transfer. Integrity failures clean up partial data automatically.
5. Application-level flow control: With high/low watermarks on the WebRTC data channel prevents buffer bloat and keeps transfers smooth at high speeds across varying network conditions.
6. Automatic reconnect on network change: When a device switches networks (e.g. mobile data -> Wi-Fi) or a connection drops, CheezyPizza detects the reconnection and resumes the download automatically from the last saved offset.
7. Multi-file transfers: Upload multiple files at once. The downloader receives them as a zip archive.
8. Password protection: Transfers can be protected with a password, verified before any file is transferred.