100% Private & Secure

Free PST Converter
Convert to Any Format

Convert Outlook PST files to EML, MSG, MBOX, PST, PDF, HTML, MHT, TEXT, CSV, JSON, VCF, and ICS. Supports ANSI & Unicode PST, password-protected and corrupted files. Recover deleted emails.

11 output formatsOutlook PST supportPreserves email structureInstant conversion

Drop PST files here

or click to browse · multiple files supported

Overview

What Is PST to MHT Conversion?

PST (Personal Storage Table) is Microsoft Outlook's format for storing email, calendar, contacts, and attachments in a single file. PST to MHT conversion turns that mailbox into MHT (MIME HTML) files — a web archive format that stores one HTML page and all its embedded resources (images, styles) in a single .mht file.

MHT is sometimes called "single-file web page." When you convert PST to MHT, each email becomes a self-contained .mht file you can open in Microsoft Edge, Internet Explorer, or other MHT-capable applications. No separate image folders or broken links — everything is embedded inside the one file, making it ideal for archiving and sharing.

Our free PST to MHT converter processes on your device. You drop a .pst file, keep MHT selected as the output format, and click Convert & Download. All processing happens on your device; nothing is uploaded. You get a portable, portable archive in the MIME HTML format — one file per message (or one combined file) with embedded resources, so your Outlook emails stay readable with full layout wherever you open them.

Features

Features

Why use the PST to MHT converter

Single-file web archive

MHT (MIME HTML) packs the HTML and embedded resources (images, styles) into one .mht file. One file = one complete web page, easy to store and share.

Open on any device

MHT files open in Internet Explorer, Edge, and many other applications. View your Outlook emails as a self-contained web page with images and formatting intact.

Embedded resources

MIME HTML embeds images, CSS, and other assets inside the file. No broken links or missing images when you move or archive the .mht file.

No upload — private

PST is read and converted entirely on your device. Nothing is sent to any server. Your Outlook data stays private.

Preserve email layout

MHT keeps the original layout and inline images so your archived emails look like they did in Outlook when opened on any device.

No Outlook required

Use the converter on Windows, Mac, or Linux. No Microsoft Outlook installation or admin rights needed.

How it works

How to Convert PST to MHT

Four steps — no install, no Outlook

01
01

Open PST to MHT Converter

Come to this page — MHT is already selected as the output format.

02
02

Drop your PST file(s)

Drag and drop one or more .pst files. The tool validates the file, detects ANSI/Unicode, and extracts emails (including recovered deleted items).

03
03

Browse and filter

View extracted emails in the preview. Apply date or keyword filters if needed. Ensure MHT is selected as the output format.

04
04

Convert & download

Click Convert & Download. You get .mht file(s). Open them in Edge or another MHT-capable application to view your Outlook emails as a web archive.

FAQ

Frequently Asked Questions

Common questions about PST to MHT conversion

Q1. What is PST to MHT conversion?
PST to MHT converts Microsoft Outlook PST files into MHT (MIME HTML) files. MHT is a web archive format that stores one HTML page plus all its embedded resources (images, styles) in a single file. You get one .mht file per email (or batch) that opens like a web page on any device.
Q2. What is MHT (MIME HTML)?
MHT (MIME Encapsulation of Aggregate HTML) is a format that bundles an HTML document and its linked resources (images, CSS) into one file using MIME boundaries. It was popularized by Internet Explorer and is still supported by Edge and other applications. One .mht file = one complete, self-contained web page.
Q3. Why use MHT instead of HTML?
With plain HTML, images and assets are often separate files. MHT embeds everything in one file, so you can move or archive a single .mht and still see the full page with images. It's ideal for archiving emails with inline images.
Q4. Do you upload my PST file?
No. The PST to MHT converter processes entirely on your device. Your PST is read and converted on your device; nothing is sent to our servers.
Q5. Which apps open MHT files?
Microsoft Edge and Internet Explorer open MHT natively. Other applications may require an extension or may not support MHT. If you need maximum compatibility, consider PST to HTML instead, which opens on every device.
Q6. Do I need Outlook installed?
No. The tool works on any modern platform — Windows, Mac, or Linux. No Microsoft Outlook installation is required.
Related

Related Tools

More converters and viewers from OnlinePCTools

PST ConverterPST to EMLPST to MSGPST to MBOXPST to PDFPST to HTMLPST to CSVPST to JSONMBOX ConverterPST Viewer