Unbubble: Open-Source iPhone iMessage Exporter for Windows
A privacy-focused tool to export iMessage threads without full device backups.
1Privacy-First Data Export
Unbubble is a free, open-source utility designed to extract iMessage and text conversations from iPhones to Windows PCs. Unlike traditional methods, it avoids full device backups, accounts, or telemetry. By streaming only the Messages database, it ensures that personal data remains local, discarding non-essential information immediately during the transfer process.
2Technical Workflow Mechanics
The software functions by installing Apple’s mobile device driver on Windows 10 or 11 systems. It connects to the unlocked iPhone, streams the specific message database, and reconstructs threads locally. This approach allows users to save conversations as HTML, PDF, CSV, or JSON files without requiring massive storage for full backups.
3iOS 27 Integration Features
For users on iOS 27 or later, a dedicated iPhone app enables exports directly without a computer. By pairing with a specific shortcut, the app reads messages in date order and generates PDFs or CSVs. This mobile-first workflow ensures that nothing leaves the device, maintaining strict privacy while providing flexible export formats.
4Handling Complex Message Data
Unbubble preserves intricate conversation details, including reactions, inline replies, edit history, and photos. It reconstructs threads from the underlying database rather than relying on screenshots, ensuring higher fidelity. While it captures most metadata, attachments offloaded to iCloud remain inaccessible, as they are not physically present on the iPhone’s local storage.
5Comparison With Paid Alternatives
Most commercial tools, such as iMazing, often impose message caps on trial versions or require paid licenses for full functionality. As of November 2026, Unbubble provides an unrestricted, open-source alternative. It focuses exclusively on message exports, avoiding the bloat of managing photos, apps, or general device backups found in other software.
6Security and Verification Steps
The Windows installer is currently not code-signed, which may trigger SmartScreen warnings during the initial execution. To ensure security, the project publishes SHA-256 checksums for every release on GitHub. Users are encouraged to verify these hashes against their downloaded files to confirm the integrity of the software before running the installer.
7Legal and Forensic Considerations
Exported PDFs include a SHA-256 fingerprint to detect future content changes, providing a verifiable record. However, Unbubble does not certify records or guarantee legal admissibility. Users must consult with attorneys regarding specific court requirements for authentication and format, as rules vary significantly by jurisdiction and the nature of the legal proceedings.
8Optional Relationship Analytics
Beyond simple archiving, Unbubble offers an optional integration with Grey Mirror. Users can choose to upload a specific conversation to analyze communication patterns, such as reply timing, message length, and interaction shifts. This step remains entirely voluntary, ensuring that the primary export tool functions as a standalone, private, and local utility.
Original article: Hacker News: Show HN — Unbubble: Open-Source iPhone iMessage Exporter for Windows