How Softaken shrinks Outlook Personal Storage Table (.pst): compact by unused/junk/Cached data Outlook no longer needs — reclaiming it shrinks the PST; or Remove All Attachments; Remove & Save Attachments; Remove, Save & Compress (Zip archive of extracted attachments (.zip)); or compact without removing attachments. Batch Add File / Add Folder.
Compact Outlook PST Files — remove unused space, junk space, and unused cache; optionally remove, extract, or ZIP attachments (Older Outlook PST format (≈2 GB limit) & Modern Outlook PST format (larger mailboxes)). Standalone Windows tool—no Microsoft Outlook required.
Salient Features at one Glance
100% Safe & Verified Download Windows installer is digitally signed with a trusted certificate, ensuring authentic publisher identity and zero tampering.
Real Softaken Compress PST Pro screens: add PST file or folder, preview mailbox data, set compression options, and choose the output location. Click each step to enlarge.
step 1 of 5
Follow Softaken Compress PST Pro steps on Windows — add PST, preview, choose options, then start. Original PST stays unmodified.
Follow Softaken Compress PST Pro steps (also shown in the demo video):
A PST file can corrupt if the data storage goes beyond limitation (ANSI – 2GB and Unicode 20 GB). The advance utility gives you facility to extract attachments, compress them and save at the desired location in your system.
Benefit: Shrink oversized PSTs before they fail.
This is called picking of a particular item. The utility extracts the attachments of a PST file and allows you to save in a new folder. In this way you can separate attachments from a PST file.
Benefit: Pull attachments out to a folder.
The application works according to your desire. It extracts attachments from those PST files that you have selected. Without your instructions, the software doesn't proceed a single step. It works as per your command.
Benefit: Extract only from the PSTs you pick.
Under this option, the tool enables you to extract only attachments from a PST file to remove them permanently. It automatically shrinks the size of the original PST file and increase the data storage capacity.
Benefit: Drop attachments to free PST space.
The PST Shrink Program is safe to use. It performs its task safely. No data loss is occurred and no file is damaged during remove, compact and save attachment process.
Benefit: Original PST stays safe; new output written.
To provide you with desired results, the PST Compressor program supports 3 options: Remove All attachments; Remove and save attachments; Remove, save and compress attachments.
Benefit: Pick remove, save, or ZIP modes.
The feature enables you to remove attachments of the selected PST file to save in a new folder. The Shrink PST feature removes unused space, junk space and unused cache to let you make the file size compact.
Benefit: Compact junk space and archive attachments.
Save attachment feature saves the extracted attachments to user's specified location. A new folder can be created to save the extracted data.
Benefit: Choose where extracted files go.
It is a standalone utility, performs Reduce and remove attachment of PST files without installation of MS Outlook and any other tool. Simply perform the compression task with this smooth utility.
Benefit: No Outlook install needed to compact.
It removes unused space and can also remove or extract attachments. Your original PST is left unchanged; the compressed data is saved as a new PST.
You can choose to compact the PST, remove attachments, extract them to another folder, or remove and compress them into a ZIP file. The options can also be combined when needed.
No. It is a standalone Windows utility, so Outlook or another tool does not need to be installed.
Yes. It supports both ANSI and Unicode PST files. The licensed version has no stated PST file size limit, but normal Outlook storage limits still apply.
Yes. Extracted attachments are saved in the folder you choose. They are separate files, so they are not embedded back into the email body.
The original PST is not overwritten. Folder structure and Plain Text, RTF and HTML content are retained while a new compressed PST is created.
Yes. Add several PST files or choose a folder, then process them together in one batch.
The demo lets you test compacting and attachment options with up to 10 items. The full license processes unlimited items, with no watermark listed for this product.
Windows desktop tool to compact Outlook PST locally. Original PST stays untouched.
New output PST: Softaken writes a new compressed PST and leaves the original unmodified. Compact unused/junk/unused cache; optionally remove, extract, or ZIP attachments. Independently scanned — VirusTotal Report.
Standalone Windows utility: No Microsoft Outlook required. Supports ANSI & Unicode PST; Plain Text, RTF & HTML formats. Also on the Microsoft Store.
Free demo evaluation: Try compacting and attachment options with Softaken-documented limit of 10 items. Full license unlocks unlimited items.
Windows 11, 10, 8.1, 8, 7
ANSI & Unicode PST
10 items
Version 2.0 · ~5.3 MB
System requirements for the Softaken Compress PST Pro Windows installer.
Desktop installer · code-signed
| Specification | Details |
|---|---|
| Product Name | Softaken Compress PST Pro |
| Version / Size | 2.0 · ~5.3 MB |
| PST Formats | ANSI & Unicode Outlook PST |
| Options | Unused/junk/cache · remove · remove & save · ZIP · compact without removing |
| OS Supported | Windows 11, 10, 8.1, 8, 7 |
| Demo | 10 items · Full unlimited with license |
| Memory | 512 MB Minimum |
| Hard Disk | 100 MB free for installation |
| Outlook required | No — standalone Windows utility |
| Delivery | Electronic · Via Email · ~15 minutes |
| Language / Support | English · Emails, Chat & Skype |
| Microsoft Store | Official Store listing |
| Security scan | VirusTotal Report |
The free demo lets you evaluate Softaken Compress PST Pro before buying—process up to 10 items to test compacting and attachment options. Full version: unlimited items. Softaken does not list a watermark for this product.
| Features | Demo Version | Full Version |
|---|---|---|
| Compress PST Files | Yes | Yes |
| Remove Unused, Junk, Unused Space | Yes | Yes |
| Remove Attachments from PST | Yes | Yes |
| Save Attachments in Other Location | Yes | Yes |
| Support ANSI and Unicode Outlook File | Yes | Yes |
| Support Plain Text, RTF & HTML Formats | Yes | Yes |
| Support Outlook 2016/13 & Other | Yes | Yes |
| Support Windows 11/10/8/7/others | Yes | Yes |
| Limitation | 10 items | Unlimited |
| Price | Free | Full license |
Client feedback from Softaken customers who compacted Outlook PST files with Compress PST Pro.
Verified user · Large PST cleanup · United States · Windows
My PST was huge and Outlook kept freezing. This tool removed the unused space and junk, and Outlook feels faster now. Simple to use.
Removed unused space; Outlook faster
Verified user · Attachment extract on backup PC · India · Windows
I pulled out the heavy attachments into a folder and the PST size dropped a lot. No Outlook install needed on my backup PC. Good tool.
No Outlook needed; attachments extracted
Try the free demo (10 items), then unlock unlimited compacting with a full license.
Available for Windows. Softaken Compress PST Pro runs as a standalone Windows utility—no Microsoft Outlook required.
