Purpose-Built
An offline MBOX and EML archive explorer for MIME structure, attachments, threads, dates, participants, duplicates, search, redaction planning, and evidence export.
One-time iPhone and iPad app
Mailfossil
MBOX and EML, indexed
Core Features
- Stream large MBOX files without uploading messages
- Inspect MIME trees, encodings, attachments, and headers
- Reconstruct threads and participant timelines
- Find exact and near-duplicate messages
- Export selected metadata or redaction worksheets
Private by Design
No account, subscription, ads, tracking, third-party analytics, or developer-operated backend. Core features work offline, and your work stays on device unless you deliberately share or export it.
Use It Responsibly
Archive inspection aid. Headers can be forged and threading is heuristic; preserve originals and follow legal, privacy, retention, and evidentiary requirements.