Best PST Splitter Tool to Split Large PST Files Easily
Discover the best PST Splitter tools to split large PST files easily! Learn how to split PST files, why it’s important, and why MailsDaddy PST Splitter is a top choice for users.

Managing large PST files in Microsoft Outlook can be a hassle. These files store emails, contacts, calendars, and more, but when they grow too big, they can slow down Outlook or even get corrupted. That’s where a PST Splitter comes in! A PST Split Tool helps you split large PST files into smaller, manageable parts, keeping your Outlook running smoothly.
In this article, we’ll explore why you need to break large PST files, how to do it, and why tools like MailsDaddy PST Splitter are a top choice for users.
What Are PST Files and Why Split Them?
PST (Personal Storage Table) files are used by Microsoft Outlook to store your emails, tasks, and other data. When these files get too large—say, over 10GB—they can cause problems like:
- Slow Performance: Outlook takes forever to load or respond.
- Corruption Risk: Oversized files are more likely to get damaged.
- Storage Issues: Large files eat up space on your computer.
To avoid these issues, you need to split PST files into smaller chunks. This process, also called dividing oversized OST files (since OST files are similar), makes your data easier to manage and keeps Outlook running smoothly.
Why Use a PST Splitter Tool?
Manually splitting PST files is tricky and risky. You could accidentally lose important emails or corrupt the file. A PST Split Tool automates the process, ensuring your data stays safe. These tools let you:
- Divide files by size, folder, or date: Choose how you want to split the file.
- Keep data safe: No risk of losing emails or attachments.
- Save time: Split files in just a few clicks.
With a reliable PST Splitter, you can break large PST files easily, even if you’re not a tech expert.
Top Features to Look for in a PST Splitter
When choosing a tool to split large PST files, make sure it has these features:
1. Easy-to-Use Interface
The tool should be simple enough for anyone to use, even a 15-year-old. A clear interface with step-by-step instructions is a must.
2. Multiple Splitting Options
Look for a tool that lets you split files by size (e.g., 1GB chunks), by folder (e.g., separate inbox and sent items), or by date (e.g., emails from 2024 in one file).
3. Compatibility
The tool should work with all versions of Outlook, including older ones like 2007 and newer ones like 2019.
4. Data Safety
The tool must protect your emails, contacts, and attachments during the splitting process.
5. Fast Performance
A good PST Splitter should quickly divide oversized OST files or PST files without freezing or crashing.
MailsDaddy PST Splitter: The Ultimate Solution
One of the best tools to split PST files is MailsDaddy PST Splitter. This advanced software is trusted by users in the United States and worldwide for its powerful features and ease of use. Here’s why it stands out:
Why Choose MailsDaddy PST Splitter?
- User-Friendly Design: Even beginners can use it. Just select your PST file, choose how to split it, and click a button.
- Flexible Splitting Options: You can break large PST files by size, folder, or date. For example, split a 20GB file into 2GB chunks or separate emails by year.
- Supports All Outlook Versions: Works with Outlook 2003, 2007, 2010, 2013, 2016, 2019, and beyond.
- Keeps Data Intact: Your emails, attachments, and contacts stay safe during the process.
- Fast and Reliable: Splits large files quickly without crashing.
- No File Size Limit: Handles even the biggest PST files with ease.
How to Split PST Files with MailsDaddy
Using MailsDaddy PST Splitter to split large PST files is super easy:
- Download and Install: Get the tool from the official MailsDaddy website and install it on your Windows PC.
- Add Your PST File: Open the software and select the PST file you want to split.
- Choose Splitting Option: Pick how you want to divide the file—by size, folder, or date.
- Set Output Location: Decide where to save the new, smaller PST files.
- Start Splitting: Click the “Split” button, and the tool does the rest!
Within minutes, your large PST file will be split into smaller parts, ready to use in Outlook.
Other Popular PST Split Tools
While MailsDaddy PST Splitter is a top choice, here are a couple of other tools you might consider:
- Stellar PST Splitter: Great for splitting files and repairing corrupted PSTs. It’s reliable but a bit slower than MailsDaddy.
- SysTools PST Splitter: Offers good splitting options but can be pricey for some users.
Both tools are effective, but MailsDaddy is often preferred for its affordability and speed.
Tips to Prevent Large PST Files in the Future
Once you’ve split your PST files, here’s how to avoid oversized files moving forward:
- Archive Old Emails: Move older emails to a separate PST file regularly.
- Delete Unneeded Items: Clear out spam or unnecessary emails.
- Use a PST Splitter Regularly: Split files before they get too big.
Final Thoughts
Splitting large PST files is a must to keep your Outlook running smoothly and your data safe. With a PST Splitter like MailsDaddy PST Splitter, you can break large PST files into smaller parts quickly and easily. Its user-friendly design, flexible options, and compatibility with all Outlook versions.
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