PST to EML Converter

Years of mail, locked in one proprietary file

A .pst is where Outlook archives a mailbox: every message, every folder, sometimes a decade of correspondence in a single file that only Outlook reliably opens. The moment you need that mail anywhere else - a new mail client, a legal review, a migration away from Exchange, or just one crucial thread from an ex-employee’s archive - the format becomes the obstacle.

This unpacks it into the universal format instead: one standard .eml file per message, in the original folder structure, delivered as a ZIP. The message bytes are passed through untouched, so headers, timestamps, Hebrew or any other charset, inline images and attachments arrive exactly as they were stored. Individual messages can then go onward through EML to PDF for a court file or EML to HTML for quick reading.

Nothing here should be uploaded carelessly

A mail archive is the most sensitive single file most people will ever handle: contracts, passwords, medical letters, the entire paper trail of a working life. Uploading it to a converter that stores files on disk means a copy of all of that sitting under someone else’s retention policy. That is the scenario this site exists to prevent: the PST is parsed inside a sandboxed process with no network access, entirely in memory, never written to disk, and deleted the moment your download is delivered. Nothing about the messages is logged.

The extraction is hardened against hostile archives too: folder names from inside the file are sanitised before they become ZIP paths, and hard caps on message count and extracted size mean a malformed PST cannot expand into an unbounded response.

Also useful alongside

Single Outlook messages saved as .msg convert directly via MSG to EML or MSG to PDF; Unix mailboxes go through MBOX to PDF. CRM-logged email and the rest of the corporate export landscape are mapped in the CRM & ERP exports guide. On the API this conversion runs at /api/convert/pst-to-eml, async jobs included.