Outlook PST Repair Tool - 2026 Pricing, Features, Reviews & Alternatives

Outlook says the data file cannot be opened, or that errors were detected, and years of mail sit behind that message. Outlook PST Repair Tool is a PST repair tool for exactly that moment. It opens the damaged .pst or .ost in read-only mode, rebuilds the parts that are still readable and saves them as a separate file, while the source stays as it was.

The usual first move is the repair utility that comes with Office. It works on the broken file directly, and a second run can replace the backup it made the first time. If the outcome is wrong, there is often nothing left to roll back to. This PST repair tool takes the opposite route: the source is never written to, so you can run it, look at the result and run it again with different settings.

🔍 How the repair works

The PST repair tool starts with the cheapest fix. If the file opens normally, it stops and says so. If the header is broken, a copy of the file gets a rebuilt header and is opened from there. Only when that still falls short does it read the whole file block by block and check every block against its checksum. On a large mailbox that last pass can take a long time, so it runs only when it has to. You can also set the depth yourself: Quick only skips the full scan, Deep scan forces it.

🚀 How to start

1. Install the PST repair tool on a Windows 10 or 11 PC. Outlook can be absent.

2. Click "Open damaged PST or OST file..." and pick the corrupt PST file.

3. Leave the depth on Automatic for a first attempt.

4. Check folders in the tree and read a few messages in the preview to judge the result.

5. Choose the output format and a destination, then press Start.

📁 What you get back

The folder tree is the repaired mailbox, not a guess. Save it as a new PST to attach in Outlook, or as MSG, EML, MBOX, PDF or HTML files when the mail is going to another client, an archive or a person without Outlook. Two checkboxes leave out attachments or inline pictures to keep the output small. Messages that lost part of their body or an attachment are still written, marked [partial] and given a note about what is missing. At the end, a report lists the repair level, the counts and the losses.

🗑 Mail that was deleted

Emptying Deleted Items does not wipe a message from the file right away. Deep scan picks up those records and places them in a Recovered Items folder. Outlook reuses body blocks early, so these messages often come back as headers, sender and date with little or no text. Compacting the file after deletion removes that chance.

👥 Who it is for

- Small businesses without an IT department whose only copy of the mail is a local PST.

- Support technicians who need a repaired mailbox plus a report to attach to the ticket.

- Professionals in accounting, law or insurance who must account for old correspondence.

- People moving off Outlook who want the rescued mail as EML or MBOX files.

❓ FAQ

Is there a repair tool for Office 365 Outlook? Desktop Outlook from Microsoft 365 keeps a local OST. If the server still has the mail, a new profile downloads it again. For mail that exists only on disk, this program reads the OST directly.

Can a corrupted OST file be repaired without Exchange? Yes. The app reads the OST from disk, needs no server connection or account, and can save the content as a PST.

What is the best tool for repairing Outlook PST files? Look for two things: it should not write into your original, and your mail should not have to leave the computer. This one meets both.

ℹ️ The free trial runs the full repair and preview on your own file, so you know what is recoverable before buying. A license enables saving.