Convert PST to HTML Online

The free online mail converter that transforms EML, MSG, PST, and MBOX files into PDF, HTML, Word, and more — no software required.

CoolUtils online mail converter supports all major email formats as input — EML, MSG, PST, OST, and MBOX — and converts them to PDF, HTML, DOC, TXT, JPEG, and other output formats. Upload the file, select the output format, and download the converted document in seconds. No installation, no registration, completely free.

CONVERT PST to HTML ONLINE

1) Upload PST file to convert

Drop files here, or Click to select

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Allowed file types: pst, ost, eml, msg, mime, smime, p7m, mbox, dbx, vcf, vmbx, opf, asice, cpgz, lzh, zcf

2) Set converting PST to HTML options

3) Get converted file

DOWNLOAD CONVERTED FILE

Full version

Get Total Outlook Converter to convert your Outlook emails safely.

Total Outlook Converter To Convert Outlook emails

Convert Outlook emails in batch!;
Convert PST to PDF, DOC, TIFF, TXT, HTML, EML and more
Convert hundreds of files in 3 clicks;
Have a desktop converter that works without Internet;
Keep your emails safe, don't send them to the web;
Get more accurate results with the more poweful engine.

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Total Outlook Converter

Convert Outlook emails from multiple sources to a variety of formats.

Filter emails by sender, subject, date, keywords, and more.

Useful data saving options - convert only necessary data from your emails.

Unique output files formatting options specify how your files will look.

Affordable Price - pay once for a lifetime license with no hidden fees.

Command Line Support - convert emails via command line.

Fast batch conversion - convert multiple emails simultaneously.

High security options - protect your output PDF files (if you choose PDF).

Various file naming and date saving options - organize your output files easily.

Variety of attachment saving options - choose how to save attachments.

Trust - you can rely on powerful email converters from CoolUtils.

Easy to use even for beginners - enjoy clear user-friendly interface.

How to convert PST to HTML?

💾 Upload Your File: Go to the site, click on «Upload File,» and select your PST file.

✍️ Set Conversion Options: Choose HTML as the output format and adjust any additional options if needed.

Convert and Download: Click 👉«Download Converted File»👈 to get your HTML file.

Cloud Based

There is no need to install any software to convert PST to HTML with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.

Secure

Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.

Ease of Use

Converting PST Outlook archive files to HTML web pages online has never been so simple. Drop your .pst and the converter renders emails as browser-readable HTML — shareable with anyone, no Outlook or email client needed.

Privacy

We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

PST File

File extension	.PST
Category	Document File
Description	PST files are intended for storing mail elements on PCs, which include mail folders and their content. PST stores copies of these elements locally, and they are supported by well-known and common applications, particularly Outlook. Users can get to their emails even when there is no stable IT connection. PSTs can be accessed via whatever version is installed on your PC. Files saved in later versions use Unicode can hold a lot more data than those created in earlier ones, which use ANSI. Users who prefer not to use this program may choose to convert messages to other formats and open them in third party utilities.
Associated programs	Microsoft Outlook
Developed by	Microsoft
MIME type
Useful links	PST to PDF Converter More detailed information on PST files
Conversion type	PST to HTML

HTML File

File extension	.HTML
Category	Document File
Description	HTML allows creating structured documents and web pages. HTML file contains command tags in angular brackets that mark out each element like title, paragraphs, quotes, links, lists, etc. Web-pages generated with HTML have .html extension (for a static web-page). HTML code is processed by a browser, while user sees only the text and other elements of the page without any tags. The source code can be viewed separately. HTML files can be edited in a common text editor like a TXT file.
Associated programs	Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
Developed by	World Wide Web Consortium & WHATWG
MIME type	text/html
Useful links	More detailed information on HTML files

2026-02-24

We publish PST email archives as browser-viewable HTML for our compliance portal — auditors can review the correspondence without needing Outlook installed, which has been a significant workflow improvement.

Helena Sørensen

2026-04-10

Converted a PST archive to HTML for an HR investigation documentation package. The output was clean enough to include directly in a web-based case management system without further editing.

Samuel Okonkwo

2026-05-18

Our legal team needed a browser-readable version of a large PST for a compliance review — the HTML output organized emails clearly and preserved all the headers we needed for context.

Ana Cristina Ferreira

Rating PST to HTML

4.6 (390 votes)Rate It

Convert PST to HTML — Frequently Asked Questions ▼

What is a PST file and why is it hard to open without Outlook?

PST (Personal Storage Table) is Microsoft Outlook's proprietary binary archive format. It stores emails, contacts, calendar events, and tasks in a complex binary structure that requires Outlook or specialized tools to read. Without Outlook installed, PST files cannot be opened natively on any operating system.

What email content is included in the HTML output?

The HTML output includes email headers (From, To, CC, Subject, Date), the formatted message body with text styling preserved, and inline images. Attachments are not embedded in the HTML file but may be listed as attachment references depending on the conversion settings.

Can I open the resulting HTML file on a Mac or Linux machine?

Yes. HTML is a universal format that opens in any web browser on any operating system — Chrome, Firefox, Safari, and Edge on Windows, macOS, and Linux all display the converted email correctly without additional software.

Does the HTML output preserve the original email formatting like fonts and colors?

Yes. The converter maps the email's HTML body content directly to the output HTML file, preserving fonts, colors, bold/italic text, tables, and inline images that were part of the original email.

Is it safe to upload PST files with confidential business emails?

Uploaded files are processed automatically and deleted from the server after conversion. For PST archives containing sensitive legal, HR, or business data, use Total Outlook Converter (Windows, from $29.90) which converts locally without uploading files to any server.

Can I convert an entire PST archive with hundreds of emails to HTML at once?

The online converter handles one PST file at a time and is best suited for small archives. For bulk conversion of large PST files or entire mailbox archives to HTML, use Total Outlook Converter desktop software, which processes entire PST archives recursively from the command line.

What is the difference between PST to HTML and PST to MBOX conversion?

PST to HTML produces static web pages for each email, suitable for viewing in a browser, sharing, or archiving. PST to MBOX produces a mail storage file that can be imported into Thunderbird, Apple Mail, or other MBOX-compatible mail clients. Choose HTML for reading/sharing, MBOX for mail client migration.

Convert PST to HTML Online

Outlook PST archives are inaccessible without Microsoft Outlook. Converting PST to HTML turns each email into a self-contained web page that opens in any browser — no software required. Share emails with colleagues, embed them in documentation, or publish archived communications on an intranet.

Browser-readable output — HTML emails open in Chrome, Firefox, Edge, and Safari without any plugin
Preserves original formatting — fonts, colors, inline images, and message layout are retained
Easy to share — send an HTML file to anyone who needs to read the email without having Outlook
Intranet publishing — post converted emails on internal web portals or documentation systems
No Outlook license needed — access archived emails without purchasing or installing Outlook

What Is PST?

PST (Personal Storage Table) is the proprietary local archive format used by Microsoft Outlook to store emails, calendar entries, contacts, and tasks. Outlook exports mailboxes to PST for backup and migration purposes. The binary format can only be opened by Outlook or specialized tools, which makes PST files a poor format for sharing or long-term archiving outside of a Microsoft ecosystem.

What Is HTML?

HTML (HyperText Markup Language) is the markup language used by all web browsers to display content. An email saved as HTML becomes a static web page that can be opened without an email client or special software. HTML output from email conversion preserves headers (From, To, Subject, Date), body text formatting, inline images, and hyperlinks. HTML files can also be indexed by search engines and embedded in documentation systems.

Online Converter vs Desktop Converter

Feature	Online (this page)	Total Outlook Converter (desktop)
Batch conversion	✓ Single file	✓ Entire PST archives, recursive
File size limit	Up to 50 MB	No limit
Automation / scripting	✗	✓ Command-line, .bat, Task Scheduler
Files stay local	✗	✓ No upload required
Price	Free	From $29.90

Batch CLI example: TotalOutlookConverter.exe C:\pst_files C:\html_output /ConvertTo html /ProcessRecursively

How to Convert PST to HTML

Click Choose File and select your .pst file
The converter parses the PST archive and reads email messages
Select HTML as the output format
Click Convert — emails are rendered as HTML pages
Click Download to save the .html file
Open the HTML file in any web browser to view the email content

When Do You Need PST to HTML?

Sharing email records — send an HTML copy of an archived email to someone without Outlook access
Legal and compliance documentation — produce HTML email records for legal filings or compliance archives where browser-readable format is required
Intranet knowledge base — publish important email communications to an internal wiki or documentation portal
Cross-platform access — make archived Outlook emails readable on macOS and Linux without installing email clients
Email audit trails — create permanent HTML records of critical business correspondence for audit purposes