Top ScanPST Alternatives to Repair Outlook PST File

As an Outlook user, facing corruption-based issues in PST files, such as ‘Cannot open a set of folders,’ Outlook not responding, Access denied error, Missing Outlook items, and more, is common. When such issues happen, your initial step, like other users, is to use Microsoft’s built-in repair utility — Scanpst.exe. While this tool can resolve small issues, it often struggles with highly corrupted, or oversized PST file. If we see the forums, many users report that it works in some cases, and it falls short in complex cases. This article covers why ScanPST isn’t always enough and its alternative tools.

What is a PST File and Why Does It Get Corrupted?

Personal Storage Table (PST) is a data file in Outlook that you can use to store mailbox data, such as emails, calendars, notes, contacts, and attachments, locally on the system. All emails you send or receive are stored in this file by Outlook. And with the time, the PST file gradually grows, it becomes more vulnerable to corruption.

This file can become corrupt due to reasons such as:

• Improper system shutdown or crash.
• Force closing of the Outlook application.
• Power failure while working on PST files.
• Large-size of the Outlook PST file.
• Issues in the hard disk where the PST file is saved.
• Conflicts caused by faulty or corrupt add-ins

What is Outlook’s Scanpst.exe?

It is a built-in repair tool in Outlook, also known as Inbox Repair Tool, used to repair corrupt PST file. This PST repair tool is a part of Outlook installation. So, you don’t have to download this tool individually. It is located in the Office program directory on your system. It is used to scan the corrupt PST file for inconsistencies errors, internal and structure issues, and resolve them.

To repair corrupt PST file using ScanPST tool, follow these steps:

• Go to the location of the Inbox repair tool. Its location varies based on the version of the Outlook you are using.
• Right-click on ScanPST. And to launch it, click Run as Administrator.
• On Microsoft Outlook Inbox Repair Tool dashboard, click Browse.
• Choose the damaged PST file and click Start.
• The ScanPST tool will start scanning the PST file for integrity errors.
• Once the file has been scanned, it will display the errors (if found). Selected the checkbox “Make backup of the scanned file before repairing” option. Next, click on the Repair option.
• Once the repair process is complete, a dialog box with the “Repair Complete” message is displayed. Click OK.

Limitations of Scanpst.exe/Inbox Repair Tool

Though the SCANPST.exe or Outlook Inbox Repair tool can repair the PST file, it has certain limitations, such as:

• It cannot repair large PST files.
• The Inbox Repair tool may need to run multiple times to completely fix or fully repair the PST file.
• The ScanPST can’t repair every issue or problem with the PST file, even if the tool detects it.
• If you had recently deleted some mail items, you may not be able to recover them after repairing the PST file using ScanPST .
• If the PST file is severely damaged or corrupt, the ScanPST may fail to repair such files.
• The ScanPST works by removing corrupt data instead of repairing it. Therefore, when it determines a specific block or table is unreadable or corrupt, it simply removes that block. As a result, corresponding Outlook items may also be removed.
• The SCANPST does not validate body-related or subject-related properties that can result in inconsistencies or loss of data or information in the mail body area.

While ScanPST.exe can repair minor inconsistencies in PST files, it cannot handle severe corruption, large files, or recover deleted data. In many cases, the tool fails to fix damaged files due to these limitations, leaving users with incomplete or inaccessible mailbox data. This is where Stellar’s dedicated PST repair tools step in.

When Should You Look Beyond Scanpst?

Not every PST file problem needs a third-party tool. But there are situations where sticking with Scanpst is a waste of time — or worse, a risk to the remaining data.

You should consider looking for an alternative when:

• Scanpst finishes but Outlook still won’t open the file
• Emails, calendar entries, or entire folders have disappeared
• Outlook keeps throwing the same errors on every launch
• The size of the PST file is too large for Scanpst to handle.
• You need to recover emails that were deleted
• The data inside the file is business-critical and you can’t afford to guess
• You want to confirm what’s recoverable before doing anything irreversible

Alternatives to ScanPST

1. Stellar Repair for Outlook

Stellar Repair for Outlook is a PST file repair tool developed by stellar. It helps you overcome the limitations of Microsoft’s ScanPST.exe. This PST Repair tool can easily restore highly corrupted PST files of large size (up to 50 GB) with precision. Trusted by individuals, IT admins, and businesses, it allows you to even recover the deleted mail items. Preview option is available in tool to know the recoverable data before saving.

If the size of the corrupt PST file is less than 500 MB, you can also use Steller’s web-based PST repair online to repair the file for free. It allows you to recover emails from a single PST file with complete integrity. You can even upgrade to the Premium edition of this online repair to lets you repair PST file of size ≤ 5GB.

2. DataNumen Outlook Repair

DataNumen Outlook Repair tool that you can use to recover all the mail items – emails, contacts, attachments, etc. – from corrupted PST file. In addition to PST format, it allows you to save the recovered mail items in other formats like RTF, HTML, and plain text format.

3. Kernel for Outlook PST Repair

Kernel for Outlook PST repair tool that you can use to repair corrupt or damaged data in PST files data. It can easily recover emails, contacts, sent items, calendars, journals, tasks, attachments, etc., with complete integrity. It helps you export the repaired file in different formats and export repaired data to Office 365, Exchange Server, or web-based email clients.

Comparison between ScanPST/Outlook Repair tool and other PST repair tools

Conclusion

In the article above, we saw how to repair a PST file using SCANPST.EXE, which is part of the Outlook installation and located in the Office program directory. Though it helps repair a slightly damaged PST file. However, it has many limitations too, due to which the Outlook’s Inbox Repair tool is not suitable in all cases. For example, it may fail to respond while repairing large-sized and severely corrupted PST files. In such a case, you can go for its alternative tools like Stellar Repair for Outlook and others. They help you repair and preview corrupted, encrypted, or password-protected PST files and allow you to save them in different formats.

About the Author

Monika Dadool is a Senior Content Writer at Stellar with 5+ years of experience in technical writing. She specializes in databases, email recovery, Microsoft 365, data recovery, and file repair. Her expertise also covers accounting software, web technologies, and operating systems. Passionate about emerging technologies, she creates practical content for IT professionals and database administrators. Outside work, she enjoys web series, reading, and experimenting with new recipes.