Processes the file incrementally
Local MBOX browser
Open an MBOX without importing it anywhere.
The archive is indexed progressively in a background worker. Search and open messages while the original mailbox stays on your device.
Free · private · no uploads · no accountOpen an email file
Drop it here or choose it from your computer.
MSGEMLEMLXWINMAIL.DATMBOX
Processed locally. Your file never leaves this browser.
How it works
Three steps. No detour through a server.
- 1Drop the MBOX archive
- 2Search while the local index is built
- 3Open or export matching messages
Keeps the interface responsive
Supports sender and attachment filters
Straight answers
Common questions
Can it open a multi-gigabyte MBOX?
The indexer reads the File in chunks and keeps message offsets instead of loading the full archive into JavaScript memory.
Is the mailbox uploaded?
No. The original File remains local and message slices are parsed in a browser worker.