EML to PST

This tool converts one or many .eml email files into a single Microsoft Outlook Unicode PST archive. All original headers, both HTML and plain‑text bodies, attachments and inline images are kept exactly as they appear in the source messages. The resulting PST contains every email in a single hard‑coded Inbox folder, because loose .eml files do not carry folder context.

Single Inbox folder

All uploaded .eml files are placed into a single PST that contains one hard‑coded “Inbox” subfolder at the root. Because loose .eml files lack folder hierarchy, the converter keeps every message together in this Inbox, providing a flat view that Outlook can open directly.

Headers and body content

Standard headers—From, To, Cc, Bcc, Subject, Date—are copied exactly, so Outlook displays the same routing information and timestamps. When an email includes both HTML and plain‑text bodies, both versions are stored; Outlook chooses the view based on its own settings, preserving rich formatting and plain‑text fallback.

Attachments and inline images

Binary attachments are transferred unchanged with their original filenames and byte‑for‑byte content, so PDFs, images, Office documents, etc., open as they did in the source email. Inline images are embedded as Outlook objects linked to the message body, rendering inline in the reading pane.

Unicode support

The PST is written in the modern Unicode format, allowing header and body text in any script—CJK, Arabic, Cyrillic, Hebrew, and others—to be stored verbatim. No text is rasterised, so multilingual content appears correctly when the PST is opened in Outlook.

Limits and scope

Batch size

Limited by the upload‑size cap of the chosen account tier; higher tiers permit larger numbers of .eml files per submission.

Download window

The generated `output.pst` can be downloaded for 24 hours after the conversion completes.