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PCVITA software to compress Outlook PST files and extract attachments
Compact PST Tool to Compress PST
PCVITA Compact PST Tool compresses oversized Outlook PST files by taking out the attachments that fill them. Choose to remove attachments, store them in a separate folder, zip them or extract and zip them together. Compact PST software handles ANSI and Unicode files in batch and writes a CSV report of every attachment it processed. Free demo lets you check the outcome on your own file before you buy.
- Input
- Outlook PST files, ANSI and Unicode
- Attachments
- Remove, save to a folder, zip or extract and zip
- Output
- Smaller PST, ZIP files and CSV reports
- Filters
- Date, file size, file type and item type
Searches every drive for PST files, skips Deleted Items and Junk folders and removes duplicate emails during the same session. See all features. To cut a PST into parts by size instead, open Split Magic.
How Compact PST Tool Shrinks an Oversized Outlook PST File
Attachments make most of a heavy PST file. Your oversized file goes in, you choose what happens to its attachments. A lighter PST comes out with the attachments saved, zipped or removed.
Oversized PST File
Outlook 2000 to 2019, ANSI or Unicode
- Mailboxes weighed down by attachments
- Several PST files added together
- Files found by a drive search
PCVITA Compact PST Tool
Works on your Windows machine
- Remove, save or zip attachments
- Date, size and file type filters
- Duplicate emails cleared by field
Lighter PST and Saved Attachments
Files land in the destination folder you set
- Attachments in ZIP format
- Attachment Export Report as CSV
- Emails Compress Report as CSV
- 1AddSelect PST files or a folder. Search every drive when needed.
- 2ChooseSet the attachment option, the folders and the filters.
- 3CompressStart the session and open the output folder.
Compress a PST File and Extract Attachments in 6 Steps
Six screens of the PST compress software from the first click to the output folder. Select a step to see its screen. Open the full walkthrough in the Software Guide.
Step 1. Add the PST Files
Install PCVITA Compact PST Tool and open it. Select Add File(s) or Add Folder to load PST files. Select Search Files when you do not know where a PST file sits, choose a drive or All Drives, tick Search in Subfolders and add the files the search lists. Remove and Remove All clear the list.
Step 2. Select an Attachment Option
Select one option. Remove Attachment deletes attachments from the added PST file. Compress Attachment stores them in ZIP files. Remove and Save Attachment in Folder takes them out of the PST and saves them to a folder. Remove and Compress Attachments in a Folder extracts them and zips them into a folder. Then select Next.
Step 3. Choose Folders and Destination
The folder tree lists every folder of the added PST file. Tick Exclude Deleted Items or Exclude Junk Folders to leave those folders alone. Select Change to set the destination folder and select Next.
Step 4. Set Item Types and Filters
Select Item Types lists emails, contacts, calendars, journals and other items whose attachments get compressed. Apply Filters gives several date filters. The File Size filter and the File Type filter include or exclude attachments by size or by file extension.
Step 5. Clear Duplicates and Compress
Specify Duplicate Criteria finds and removes duplicate emails by the email fields you choose. Select one or more fields, press Save and then Next. Compression starts. A completion button appears when it ends.
Step 6. Open the Output and Reports
Select the completion button and open the destination folder. The folder holds zipped attachments, an Attachment Export Report as CSV and a PST file Emails Compress Report as CSV.
Free demo, no licence needed to see the result on your own data.
Compact PST Software Features
What PCVITA Compact PST Tool does with a heavy Outlook data file, grouped by task.
Removes, Saves or Zips Attachments
Attachments take the biggest share of a PST file, so Compact PST Tool starts there and gives you four ways to handle them.
Remove Attachment
Deletes attachments from the added PST file for good, so keep a copy of the file first.
Compress Attachment
Stores the attachments in ZIP files to cut the size of the data.
Remove and Save Attachment in Folder
Takes attachments out of the PST file and stores them in a folder you choose, which turns the tool into an Outlook attachment extractor for every added file.
Remove and Compress Attachments in a Folder
Extracts attachments and zips them in one pass, so the PST shrinks and the saved files stay small.
Finds and Adds PST Files in Bulk
Load one file, a folder of files or every PST file on the machine in a single session.
Add File(s) and Add Folder
Select the PST files in the file dialog or add a full folder, then confirm with Open.
Search Files Across Drives
Select a drive or All Drives and tick Search in Subfolders when you do not know where Outlook stored a PST file.
Search Results Ready to Add
The search lists the PST files it found, so you add the ones you want to compress.
Remove and Remove All
Clear one file or the full list before you start the session.
Filters Narrow What Gets Compressed
Control which items and attachments the tool touches before the session starts.
Select Item Types
Choose emails, contacts, calendars, journals and other items whose attachments get compressed.
Multiple Date Filters
Apply Filters limits the session to the date range you set.
File Size Filter
Handle only attachments that match the size range you enter.
File Type Filter
Include or exclude file extensions during attachment compression.
Exclude Deleted Items and Junk Folders
Tick two options in the folder tree to leave those folders out.
Writes Clean Output and Reports
Everything the session produces lands in the destination folder you chose.
Attachments in ZIP Format
Compressed attachments sit in ZIP files that open on any Windows machine.
Attachment Export Report
A CSV file lists the attachments the tool handled.
Emails Compress Report
A second CSV file records the compression of the PST file emails.
Duplicate Email Removal
Specify Duplicate Criteria removes duplicate emails using the fields you select, which trims the file further.
Try the options on your own PST file with the free demo before you buy.
Why Outlook Compact Now Leaves Attachment Heavy PST Files Large
Four facts from Microsoft pages about PST size, plus what PCVITA does about the attachments behind them.
- 1
Compaction Follows Deletion
Microsoft states that Outlook compacts a data file in the background during idle time after you delete items. Compact Now only recovers the space that deleted mail left behind, so attachments you keep stay in the file. PCVITA Compact PST Tool works on the attachments themselves.
- 2
White Space Sets the Trigger
Outlook compacts automatically only when more than 20 percent of the file is unused space, according to the same Microsoft page. A PST file full of live attachments has little white space to recover. PCVITA tool shrinks it by moving those attachments out.
- 3
Microsoft Points to Moving Large Items
Mailbox Cleanup shows folder sizes and finds items larger than a size you enter. Microsoft then suggests deleting the large items or moving them to another PST file. The page lists no bulk step for attachments. PCVITA software saves or zips attachments for many files in one session.
- 4
Size Limits Still Apply
ANSI PST files top out at 2 GB. The Unicode default sits at 20 GB for Outlook 2003 and 2007 and at 50 GB from Outlook 2010 on. Compressing attachments keeps a file well under those marks.
Prepare Before You Compress Your Outlook PST File
Six checks before your first session.
- Keep a copy of the PST file. Remove Attachment erases attachments in the added file for good, so a spare copy protects the originals.
- Install Microsoft Outlook and configure it with a valid or dummy profile. Compact PST Tool needs the Outlook application on the machine.
- Install Microsoft .NET Framework 4.5 or above on Windows 10, 8.1, 8 or 7.
- Open the tool with Run as Administrator on Windows 10, 8.1, 8 or 7.
- Decide what happens to attachments. Remove them, store them in a folder, zip them or extract and zip them. Leave room at the output location.
- Test the free demo on your file before you buy. Download the Compact PST Tool demo and compare the file sizes yourself.
System lines match the Specifications table below. The compaction facts follow the Microsoft pages linked in the Sources.
Compact PST Tool Pricing
Free demo first, then one licence. Both editions share the same options, only the number of items you compress differs.
Demo Edition
Free
Test the compression on your PST file
- Items compressedLimited set
- FeaturesAll
- LicenceNot needed
Version 3.1, 1.3 MB, Windows
Full Edition
$49 one licence
Compress the data files you add, with no demo limit
- Items compressedNo demo limit
- FeaturesAll
- DeliveryEmail within minutes
30 Days Money Back*, Safe & Secure checkout
Included in both editions The demo and the full edition share the options below
- Add PST Files or a Folder
- Remove PST Files From the List
- Four Attachment Options
- Drive Search for PST Files
- Date, Size and File Type Filters
- Duplicate Email Removal
- ZIP Output for Attachments
- Two CSV Reports
Compact PST Tool Specifications
Version, system needs and compression limits in one place.
| Version | 3.1 |
|---|---|
| File size | 1.3 MB |
| Windows versions | Windows 10, 8.1, 8 and 7, Windows Server 2008 and 2012 (32 and 64 bit) |
| Prerequisites | Microsoft .NET Framework 4.5 or above, Microsoft Outlook installed and configured with a valid or dummy profile |
| Hardware | 1 GHz processor (2.4 GHz recommended), 512 MB RAM (1 GB recommended), 5 MB free hard disk space |
| Free demo limit | Limited set of items, full edition has no demo limit |
| Delivery | An email with the download link and the activation key arrives within a few minutes after payment confirmation |
| Input files | Outlook PST files, ANSI and Unicode |
|---|---|
| Outlook versions | Outlook 2019, 2016, 2013, 2010, 2007, 2003 and 2000 (32 bit) |
| Attachment options | Remove Attachment, Compress Attachment, Remove and Save Attachment in Folder, Remove and Compress Attachments in a Folder |
| Filters | Item types, several date filters, file size, file type, Exclude Deleted Items and Exclude Junk Folders |
| Duplicates | Duplicate email removal on the email fields you select |
| Output | Zipped attachments, plus attachments saved in a folder |
| Reports | Attachment Export Report and PST file Emails Compress Report, both as CSV |
Compact PST Tool vs Outlook Compact Now
Microsoft’s own compaction step next to PCVITA tool, so you can decide which route fits your file.
| Point | Outlook Compact Now | PCVITA Tool |
|---|---|---|
| What shrinks the file | Space freed by items you deleted | Attachments removed, saved in a folder or zipped |
| Deleting mail first | Needed, Microsoft says to delete items and empty Deleted Items | Not needed, attachments are the target |
| Automatic trigger | Only above 20 percent unused space | You start the session when you want |
| Keeping attachments | Microsoft suggests moving large items to another PST file | Saves them in a folder or in ZIP files |
| Finding large items | Mailbox Cleanup lists items above a size you enter | File size, file type and date filters |
| Data files per session | One data file at a time in its Settings dialog | Several PST files, found by a drive search |
| Reports | None described by Microsoft | Two CSV reports |
| Price | Included with Outlook | Free demo, full edition $49 |
Compact Now facts come from Reduce the size of your mailbox and Outlook Data Files (Microsoft Support). Size limits come from Configure the size limit for Outlook data files (Microsoft Learn). Tool facts come from the Specifications and Features sections above.
PST Size Check Before You Compress
- ANSI PST files top out at 2 GB.
- Outlook 2003 and 2007 set a 20 GB default for Unicode PST files.
- Outlook 2010 and later raise that default to 50 GB.
- Outlook compacts a file by itself only when more than 20 percent of it is unused space.
- A PST file that fails to open after it hits a limit needs repair first. Open the Outlook PST Repair Tool page for that case.
Open the Software Guide for the filter and attachment options that keep a PST file under the limit.
Sources for PST Compaction Facts Microsoft pages behind the limits on this page
Compact PST Tool FAQs
Answers to the questions users ask before and during PST compression, grouped by topic.
Working and attachments How the tool behaves during the session
How does the Compact PST Tool work?
Six steps compress a PST file.
- Step 1. Open PCVITA Compact PST Tool and add PST files with Add File(s) or Add Folder.
- Step 2. Select an attachment option and select Next.
- Step 3. Tick the folders and set the destination.
- Step 4. Choose item types and apply filters.
- Step 5. Set duplicate criteria, select Save and Next, then wait for the session to end.
- Step 6. Open the destination folder for the ZIP files and the CSV reports.
How do I compress a PST file in Outlook?
Delete items you do not need, then use Compact Now. Empty the Deleted Items folder, go to File, Account Settings, Account Settings, open the Data Files tab, select the data file and select Settings. Select Compact Now and then OK. For attachment heavy files, PCVITA Compact PST Tool shrinks the PST by handling the attachments.
Do PST files contain attachments?
Yes. Outlook stores the attachments of every message inside the PST file, so attachment heavy mail fills it fastest. PCVITA Compact PST Tool targets those attachments to cut the size.
How do I extract all attachments from an Outlook PST file?
Select Remove and Save Attachment in Folder. Add the PST file, choose that option, set the destination and start the session. Compact PST Tool takes the attachments out of the PST and saves them in the folder you chose.
Does Remove Attachment delete attachments for good?
Yes. Remove Attachment deletes attachments from the PST file you added and the removal is permanent. Keep a copy of the file or choose Remove and Save Attachment in Folder to keep the files.
Can I compress several PST files at once?
Yes. Add several files or one folder in one session. Select Search Files to list every PST file on a drive or on All Drives. Add the ones you need.
Can I choose which attachments get compressed?
Yes. Filters limit the session by date, size and extension. The item type step selects emails, contacts, calendars, journals and other items. Exclude Deleted Items and Exclude Junk Folders skip two folders.
Does the tool remove duplicate emails from a PST file?
Yes. Specify Duplicate Criteria finds and removes duplicate emails using the email fields you select. Choose one or more fields and press Save. For a full duplicate cleanup in Outlook, open the Outlook Duplicate Items Remover.
Demo and price What the demo covers and what a licence costs
What does the free demo of the Compact PST Tool do?
Everything with a limited item count. Demo edition adds your PST files, offers every attachment option and filter. Compression covers a limited set of items so you see the result. The full edition removes the limit.
How much does the full edition cost?
$49. One licence comes with a 30 day money back guarantee. Your activation key arrives by email within minutes of payment.
Compatibility and output Outlook and Windows versions, file size and the files you get
Do I need Outlook installed to compress a PST file?
Yes. Compact PST Tool needs Microsoft Outlook installed and configured with a valid or dummy profile. Without the Outlook application the tool does not work.
Which Outlook versions does the PST compress software support?
Outlook 2019, 2016, 2013, 2010, 2007, 2003 and 2000 in the 32 bit edition. PCVITA Compact PST Tool reads ANSI and Unicode PST files from those versions.
Which Windows versions does the tool support?
Windows 10, 8.1, 8 and 7, plus Windows Server 2008 and 2012, in 32 and 64 bit. Compact PST Tool needs Microsoft .NET Framework 4.5 or above, a 1 GHz processor, 512 MB RAM and 5 MB free disk space. Open it with Run as Administrator.
Can I compress a PST file of any size?
Yes. PCVITA Compact PST Tool handles ANSI and Unicode PST files of any size. Large files take longer, so start the session and keep the machine on.
What files does the tool create after compression?
ZIP files, saved attachments and two CSV reports. The output location holds zipped attachments, the Attachment Export Report and the PST file Emails Compress Report.
Question not answered here? Ask on Live Chat or write to us from the Contact Us page.
Compact PST Tool Reviews
Ratings collected on pcvita.com and what customers wrote after compressing their PST files.
Compact PST tool helped me a lot to get rid of all problems that I was having due to my large Outlook data files. This product is designed with most useful features, i.e., remove selected data files, batch item compression and so on. Compress PST file in Outlook is one of the best applications that I have ever used to compress multiple PST files.
Outlook PST compress application is such an impressive tool that helps to compact multiple PST files at once. It has a brilliant graphical user interface that makes the PST file compression more easy to perform. I suggest this amazing software to end users who need to reduce oversized PST files. Thanks a lot!!
GearDownload: 100% clean badge, no spyware, adware or viruses found in PCVITA software.
DownloadAtoZ: 5 star award badge for PCVITA software. See every badge on the PCVITA awards page.
Key Takeaways on Compressing PST Files
The short version of this page.
- Attachments first: Compact PST Tool removes, saves, zips or extracts and zips the attachments that fill a PST file.
- Bulk and search: add several PST files at once. Search a drive to find every PST file.
- Filters: narrow the session by item type, date, size and extension. Clear duplicate emails by field.
- Output: ZIP files, saved attachments and two CSV reports land in the destination folder.
- Demo and price: the free demo previews the outcome on your file, the full edition costs $49 with 30 days money back.
Test the Compact PST Tool on Your Oversized PST File
Download the free demo, add your PST file, choose an attachment option and see the smaller result before you buy the full edition.
Safe & Secure · 30 Days Money Back*