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PST file Repair Software - Overview

Toolkit to Manage & Optimize Outlook Data Files (OST/PST)

Stellar Outlook Toolkit is an advanced “8-in-1” software package – designed for Outlook users and IT administrators – for repairing corrupt PST files, converting OST into PST, splitting & compacting PST file, and recovering deleted items & password of Outlook account. The Toolkit also helps optimize Outlook performance by merging PSTs & removing duplicate items from the mailbox. It supports Outlook 2019, 2016, 2013, & previous versions.


Comprehensive Tool for Outlook Users & Admins

  1. Repairs large-sized, severely corrupted PST & recovers all mailbox data
  2. Converts inaccessible OST file into PST file & extracts all mail items 
  3. Splits and compacts PST file 
  4. Merges multiple PST files into a single file
  5. Removes duplicate emails to reduce PST file size
  6. Recovers deleted mailbox items & lost password of Outlook account

Software in Stellar Outlook Toolkit

8-in-1 Software Package for All Outlook Issues

Stellar Outlook Toolkit contains a set of 8 different utilities to help Outlook users and IT administrators save time and efforts in resolving Outlook issues.

key Features for outlook Repair Toolkit

An All-in-One Solution – Manages Outlook Performance & Issues

Stellar Toolkit for Outlook helps repair & recover Outlook data file (.pst). Also, it supports OST to PST conversion. Further, the toolkit provides tools to merge PST files, delete duplicate mail items, repair database files, and retrieve & reset PST file password. 

Stellar Data Recovery

Repairs and Recovers Corrupt PST File

Stellar Repair for Outlook Technician software in the Toolkit helps in repairing severely corrupted PST file, without any file size limit. The Outlook PST repair tool from Stellar® also recovers inaccessible and deleted mail items, maintaining the integrity of mailbox data. Further, it restores the recovered data to PST or other file formats such as PDF, DBX, EML, MSG, HTML, MBOX, etc.

Stellar Data Recovery

Converts Inaccessible OST into PST

Stellar Converter for OST Technician, a specialized OST to PST converter tool, helps extract all mailbox items from an inaccessible OST file, including the deleted items. The tool can convert OST file of any size into PST file in a few simple clicks. It also allows free OST to PST conversion of 20 emails per folder. 

Stellar Data Recovery

Previews Repaired & Converted Mailbox Data

Stellar Outlook Toolkit software displays an enhanced preview of the recoverable or converted mail items, including emails, calendar, journals, contacts, etc. The preview feature helps users verify the data before saving it to the resultant PST or any other file format. 

Stellar Data Recovery

Exports Mailbox Data to Office 365

Stellar Repair for Outlook and Stellar Converter for OST tools in the Toolkit help export the mailbox data directly to an Office 365 account. All you need is to select the mailbox data, from repaired PST or converted OST file, and then choose Office 365 as the ‘Save’ option to export the selected data to Office 365.

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*The Free Demo version of Stellar Toolkit for Outlook only works with limited functionalities

How the Toolkit Works

Quick & Easy-to-Use Software

Trusted by Outlook users and IT admins worldwide, Stellar Toolkit for Outlook is a one-stop solution for all your Outlook repair, recovery, and conversion needs. Easy to download and install, the software quickly and efficiently performs the selected operation in three simple steps. 

Select Required Software

Select Required Software

Select the desired software module according to your needs

Stellar Repair for Outlook

Stellar Repair for Outlook

Stellar Repair for Outlook with option to browse and select the PST file

Merge Mailbox Module

Merge Mailbox Module

Stellar Merge Mailbox for Outlook with option to drag & drop PST file

Deduplicator Outlook Module

Deduplicator Outlook Module

Stellar Deduplicator for Outlook with option to select the folders for deduplication


Technical Specifications

About Product

Stellar Toolkit for Outlook



Release Date

January, 2024

License Usage

Single User

Version Support

MS Outlook Office 365, 2019, 2016, 2013, 2010, 2007



Language Supported

English, Deutsch, Français, Italiano, Español, 日本語

System Requirements

System Requirements


Intel compatible (x64-based processor)

Operating System

Windows 11, 10, 8.1, 8, 7


4 GB minimum (8 GB recommended)

Hard Disk

250 MB for installation files



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Start Using Stellar Toolkit for Outlook Today

Powerful Outlook repair, recovery and conversion tool. Easily and quickly performs Outlook OST/PST recovery, converts OST to PST, merges PSTs, undeletes mail items, & resets PST password.

Free Download Free Download 100% Secure Buy Now Buy Now

*The Free Demo version of Stellar Toolkit for Outlook only works with limited functionalities.


Can this Toolkit repair large-size PST file of 35 GB?

Yes, Stellar Repair for Outlook software in this Toolkit can efficiently repair large-sized PST files.

Can the Toolkit help me extract mailbox data from a large OST file without an Exchange account?

Yes, Stellar Converter for OST software available in the Toolkit can open a large-sized OST file without Exchange. Once the OST file is open, the software extracts the mailbox data and converts it to PST file format.

I have a very large PST file in GBs, and I am worried that the file may get corrupted. I need to split it. How can I do that?

Use Stellar Splitter for Outlook software in the Toolkit for splitting the PST file. The software can split the PST file up to 50 GB based on different parameters like Email ID, Date, or Size. 

Is it possible to recover deleted OST file items by using this Toolkit?

Yes, you can recover the deleted items from an OST file by using Undelete Email for Outlook software available in the Toolkit.

My Outlook performance has become too slow due to duplicate mails. How can I find and delete the duplicate mails?

Too many duplicate items in the mailbox, particularly emails with a large attachments, take unnecessary space and increase Outlook data file size. An oversized Outlook data file can cause Outlook to load slowly.

You can find and remove the duplicate (& redundant) mailbox items by using the Stellar Deduplicator for Outlook software.