Corbett

PST File Analyzer

Corbett PST File Analyzer opens Outlook PST files without Outlook and builds a report of item counts, folder sizes, attachments, top senders and recipients. It flags corrupt files, filters by date and saves the report as PDF or HTML. Windows software with a seven-day data trial.

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4.9 out of 5 from 493 reviews

PST files are read on this PC. Nothing from the data file reaches Corbett.

Free demo, scanned clean on VirusTotal and a 30-day money-back window.

Lifetime licence from $49 Free trial reports the last 7 days

File facts

PST File Analyzer for Outlook Data Files

A PST grows quietly until Outlook slows to a crawl or warns that the 50 GB limit is near. Outlook itself says little about why. PST File Analyzer opens the file, counts every item and shows which folders, senders and attachments take the space, so the cleanup targets the real cause.

Reported

Item counts
Folder sizes
Attachment types
Attachment sizes
Top senders
Top recipients
Corruption signs

Data files

Unicode PST
ANSI PST
Archive PST
Orphan PST
Exported PST
Backup PST
Several PSTs at once

Report tools

Overview
Chart view
Details tab
Date range
Keyword search
Check Corrupt Files
Save as PDF
Save as HTML

Not changed

Messages
Folders
Outlook profile
Original PST

Why large PST files cause trouble

Older ANSI PSTs break at 2 GB and modern Unicode PSTs stop at 50 GB by default. Long before either limit, search and send slow down. The analyzer shows exactly what fills the file, which beats guessing with Outlook's folder properties.

PST File Analyzer guide

Core features

PST File Analyzer in Five Steps

Open the file, read the report, check messages, narrow the dates and save.

Open

Load One or Several PST Files

Click Open, choose PST File, then Choose Files. Add one data file or several, and the scan starts on its own.

Open, PST File, Choose Files
Many PST files in one session
Outlook not required
Orphan files from old PCs

Overview

See What Fills the PST

The overview shows item counts and file usage straight after the scan, with folders kept in their original order.

Total items and size
File usage by folder
Original folder hierarchy
Item types separated

Message detail

Check Messages Inside the PST

The Details tab opens any item for a closer look, useful when an investigation needs the message itself next to the numbers.

Content displays the message as Outlook would
Message Header exposes routing and timestamps
Attachments list type, size and sender
Top senders and recipients appear in the chart view

Date filter

Analyze PST Data by Date or Keyword

A date range limits the report to one period, and the search bar finds messages by keyword. Review one quarter for an audit or one project for a dispute.

Start and end date
Keyword search bar
Average sent and receive time
Emails replied counts
Response figures
Totals sent and received

Report

Save the PST Report as PDF or HTML

Save As exports the finished report. PDF suits case files and managers, HTML opens in any browser and links well inside an intranet.

PDF for records and evidence
HTML for browser viewing
Found the PST is damaged? See how to Repair PST file without scanpst tool
Large mail exports in other formats? The MBOX Converter handles those

Before scanning

PST File Analyzer Checks

Three steps for a clean scan and a report that stands up later.

Outlook

Close Outlook first

Outlook locks the PST while it runs. Close it, or analyse a copy, so the scan reads the full file without errors.

Evidence

Work on a copy for investigations

Copy the PST and record its hash before scanning. The original stays untouched and the copy can be shown to match it later.

Location

Find PST files on the PC

Outlook stores data files under Documents, Outlook Files by default. Older setups keep them in AppData, Local, Microsoft, Outlook.

Outlook data problems are covered in Restore OST file and Extract contacts from PST file.

Free trial

Analyze a PST Free for 7 Days of Data

Get the trial, point it at a real PST and study a week of reported data. Buy when the numbers prove useful.

Download free demo

Before purchase

Outlook Folder Size vs PST File Analyzer

Outlook can list folder sizes through Data File Properties at no cost. That covers one question. Attachments, senders, corruption and saved reports need more, as the rows below show.

Job	Outlook Folder Size	PST File Analyzer
Cost	Built into Outlook	$49 one time
Size of every folder	Listed in properties	In the overview too
Attachment report	Not available	Types, sizes and senders
Top senders	No view	Chart view
Orphan PST	Needs an Outlook profile	Opens without Outlook
Corruption check	Separate ScanPST run	Check Corrupt Files
Many PST files	Attach one by one	Batch in one session
Saved report	Screenshots only	PDF or HTML

Green rows mark where Outlook's folder view is enough.

To see which folder is biggest, Outlook's Folder Size window does the job. Pulling contacts out of a PST is covered in Extract contacts from PST file .

Specifications

PST File Analyzer Specs

Download details

Version: 1.2
Download size: 42.4 MB
Trial limit: Last 7 days of data
Delivery: Download link and key by email
Licence: Lifetime, from $49

Download Now

System

Hard disk: 131.1 MB free disk space
RAM: 2 GB minimum
Processor: Core 2 Duo, 2.4 GHz
Rights: Run as Administrator
Microsoft Outlook: Not required

Supported editions

Windows 11, 10, 8 and 7 in 32-bit or 64-bit, plus Windows Server 2008 to 2019.

No macOS or Linux build.

Corbett has built Windows email utilities since 2020. PST reporting questions go to the people who built the scanner.

Working process

PST Report Video

Prefer stills? The PST File Analyzer guide walks through every screen.

Common questions

PST File Analyzer FAQs

Reports, corruption, Outlook and what the trial shows.

How do I analyze a PST file without Outlook?

Click Open, choose PST File and Choose Files. The report builds on its own. Use Details to read messages and Save As to export.

Must Microsoft Outlook be present?

No. The analyzer reads PST files directly, including orphan files from another PC.

Can it find corrupt PST files?

Yes. Check Corrupt Files scans your data files for signs of damage.

What does the report include?

Item counts, sizes, file usage, attachment details, top senders and recipients, response figures and sent or received totals.

Can I export the report?

Yes. Save As offers PDF and HTML.

Can I analyze several PST files together?

Yes. Choose Files accepts more than one data file per session.

Is it suitable for forensic work?

Yes. Investigators use it to profile mailboxes. Work on a hashed copy so the original stays untouched.

Can the report cover one period only?

Yes. Set a date range and the report covers that span.

Why is my PST so large?

Usually big attachments or old folders. The attachment report shows which senders and file types take the space.

Does it modify my PST?

No. It only reads the file.

What is the PST size limit?

Unicode PST files default to 50 GB in recent Outlook versions. Old ANSI files stop at 2 GB.

Does it read OST files?

The Open menu offers PST and OST choices. Close Outlook before loading an OST that belongs to a live profile.

Can I run it on a Mac?

No. It needs Windows 7 to 11 or Windows Server 2008 to 2019.

What is the licence price?

Prices start at $49, and bigger licences cost more. Payment is one time.

What does the PST File Analyzer trial show?

Complete reports and charts covering seven days of data from your PST.

Step by step

Outlook Data Guides

Help for the jobs around a PST report.

PST and OST

Beyond PST

Utilities

Moving mail between services is on the Email Migration Tool page, server-side moves on the IMAP Migration Tool page. Outlook data formats convert with the email converter tool. Unreadable mailbox data needs the email recovery software. PST files can be viewed at no cost in the email viewer software. More tools: Email Eraser Tool and Metadata Cleaner. Also see the Website Downloader, Sitemap Generator, XLS to CSV Converter, USB History Viewer and VBA Password Remover.

User testimonials

PST File Analyzer Reviews

493 ratings from Outlook users and investigators who profiled PST files with Corbett.

4.9 out of 5

Collected across 493 reviews received on download portals and through support. The three below are left as written.

Oversized PST explained

I used this tool to analyze my oversized PST file and found that the problem is because of the large attachments. It is such a great tool where I can easily create a report and analyze my Outlook file.

Thomas Stuart

Corruption found quickly

For the past two weeks I was struggling to open my PST files. I found this software while surfing through the internet and checking if my file is corrupt or not. I am very impressed with this tool as it quickly scans and finds the issues in my files.

Paris Kealen

Easy for non-technical users

The simple and intuitive interface of the software allows you to analyze details of your PST file. With the help of this tool I can easily find my corrupted file. So, for a non-technical background this software is very helpful.

Mary Smith

Get started

Find Out What Fills a PST File

Load a PST in the trial, read a week of data and buy when the report helps. The $49 licence carries a 30-day refund policy.

Download free demo Purchase now

42.4 MB · Windows 11 to 7 and Windows Server 2019 to 2008 · 30 day money back