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PST Splitter Tool
Divide Large Outlook PST

Split oversized PST by size, date, year, or category. Add single or multiple PST files (or folder). Skip deleted items and junk. No Outlook required. Compatible with Windows 11 and earlier.

Split by size, date, year, categorySingle / multiple PST or folderSkip deleted & junkNo Outlook required

Drop PST files here or use Add File(s) / Add Folder

Features

PST Splitter Tool Features

Divide PST by Size, Date, Year, Folder, Category

Split oversized PST by size (1 MB to 1 TB), by date range(s), by year, by folder, or by category (Mail, Contacts, Calendar, Notes).

Add Single / Multiple PST File(s) or Folder(s)

Add one or more PST files or select a folder to load all PST files. Option to remove unwanted files from the list before splitting.

Split Archive & Active PST

Split both Outlook archive PST and active PST files. Supports healthy and corrupted PST; works without MS Outlook installation.

Skip Deleted Items and Junk Folder

Option to skip Deleted Items and Junk folder from the splitting process so only wanted mail is in the output parts.

ANSI & Unicode PST

Supports PST (ANSI and Unicode) from all MS Outlook 32/64-bit versions. Split one PST to multiple MBOX parts; import back into Outlook as needed.

Windows 11 & Earlier

PST splitter runs in your browser. Compatible with Windows 11, 10, and other versions. No admin privileges required.

Compare Plans

Free vs Paid — PST Splitter

Get started free, upgrade when you need more power.

Feature

Free

Paid

Daily usage

5 uses/day

Unlimited

File size limit

10 MB

Up to 500 MB

All core features

No software installation

Works on any device

Files stay on your device

Batch processing

Priority support

Upgrade — starting at $14.99/mo

Upgrade to Full Version

Unlock the Full Power of PST Splitter

Remove daily limits, process larger files up to 500 MB, enable batch processing, and get priority support.

Buy Full Version — $14.99/mo or $600 enterprise

Email Converters includes:

All 7 email converters (54 conversions)
Unlimited daily uses
100 MB file size limit
Date range filtering
Deleted mail recovery
All 15+ output formats

Also available in the All Tools Bundle

How to Split PST

Add PST file(s) or folder

Click Add File(s) or Add Folder to load one or more Outlook PST files.

Choose split option

Select divide by Size (MB), Date, Year, or Category (Mail, Contacts, Calendar, Notes). Set chunk size or split date if needed.

Set options

Optionally skip Deleted Items and Junk so only desired data is split.

Split and download

Click Split PST. A ZIP with part-1.mbox, part-2.mbox, etc. is downloaded. Import MBOX into Outlook or any mail client.

FAQ

How do I split a large PST file without Outlook?

Use this PST splitter: add your PST file(s), choose split by size, date, year, or category, then click Split PST. The tool runs in your browser and does not require Microsoft Outlook. You get a ZIP of MBOX parts that you can import elsewhere.

Can I split by size, date, and year?

Yes. You can divide PST by size (set chunk size in MB), by a single date (items before and after that date), by year (separate part per year), or by category (Mail, Contacts, Calendar, Notes).

Can I add multiple PST files or a folder?

Yes. Use Add File(s) to select multiple PST files, or Add Folder to load all PST files from a folder. You can remove any file from the list before splitting.

Does it skip deleted items and junk?

Yes. Options let you skip Deleted Items and Junk so only the mail you want is included in the split parts.

Does it work on Windows 11?

Yes. The tool runs in your browser and is compatible with Windows 11 and earlier. No installation or admin rights required.

PST Splitter ToolDivide Large Outlook PST