Cycling through all six. Tap any point to stop.

Measured on six things

Split oversized PST files by size, year, or folder with e...

Security

HTTPS enforced and SPF present, but no HSTS, CSP, frame protection, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, secure cookies, or DMARC — 3/13 checklist points. No SOC 2, ISO, or security page published.

Screenshots

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Outlook PST Split Expert

About this app

DataVare Outlook PST Split Expert is a reliable and simple-to-use tool for dividing huge Outlook PST files into smaller portions. It has important features that make PST file management easy without technical support. Users can split PST files of different sizes as per their demand, such as size, year, and folder. The program allows for safe processing with 0% data loss and maintains the mailbox's data integrity. Users don't need to have Outlook installed to utilize this application. Its elegant user interface makes the splitting procedure easy for both expert and non-technical users. The program supports ANSI and Unicode PST file formats and is very compatible with Outlook 2021 and prior versions. Works on Windows 11, 10, 8.1, 8, 7, and other compatible Windows systems. There is a free demo version, which allows users to try out the program before purchasing the complete version.

Key features

1Split PST files by size (MB/GB), by year range, or by folder (Inbox, Outbox, Notes, Messages).
2Supports both ANSI and Unicode PST formats; no Outlook installation required.
3Free demo version available; runs on Windows 11, 10, 8.1, 8, 7 and earlier.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

IT administrators in large enterprises

Pain points

Struggling with oversized PST files causing performance issues and corruption risks

Primary needs

Reliable, fast splitting of PST files without data loss

Demographic

Small business owners managing email archives

Pain points

Limited technical expertise to manually split PST files; risk of data corruption

Primary needs

User-friendly tool to split PST files by size or year

Demographic

Individual users with large personal email archives

Pain points

PST files exceeding size limits leading to Outlook errors

Primary needs

Affordable solution to split PST files safely and easily

Scout Review

Written by AI from measured evidence, scored out of 100.

DataVare Outlook PST Split Expert is a legacy Windows utility wrapped in a dated marketing site. The core promise — split oversized PST files by size, year, or folder without Outlook installed — is real and the free demo lowers the barrier. Speed is genuinely good (desktop 98, mobile 89). But the design is stuck in the Windows 7 era, the docs page is a placeholder, security headers are 3/13, and the category is crowded by SysTools and Stellar. It's a functional tool that hasn't been refreshed in years.

Measure by measure

Usability

Clear hero CTAs, a free demo, and a four-question FAQ cover the basics, but the docs 'video' page is a heading with no steps or video, and the app UI is a cramped legacy wizard. Functional, not friendly.

Design

Dated Windows-Forms-era app UI and a homepage with placeholder spec text ('Electronic Via Email', 'Minutes 15'), six near-identical feature cards, and a low-contrast warning banner. Hero CTA and 4.8/5 rating badge are the only polished elements.

Speed

Lighthouse desktop 98/100 and mobile 89/100 with CLS 0.001 and TBT 0ms — genuinely snappy. Mobile LCP of 3.2s is the one soft spot, sitting above the 2.5s 'good' line.

Security

Accessibility

Lighthouse a11y 94/100 with two real failures: unnamed buttons and non-sequential headings. English-only, no a11y statement, but the cookie consent panel shows granular preference toggles.

Growth

Real, specific problem (PST size limits corrupt mailboxes) with concrete differentiators — split by size/year/folder, ANSI+Unicode, no Outlook needed. But SysTools and Stellar already own this niche and Microsoft's auto-archive eats the low end.

Improvement areas

Placeholder text in the Software Specifications panel ('Electronic Via Email', 'Minutes 15') undermines credibility.
Docs 'video' page contains no steps or video — needs a real step-by-step guide.
Security headers at 3/13 (no HSTS, CSP, DMARC, secure cookies) for a tool handling mailbox data.
Dated Windows Forms UI and low-contrast warning banner on the homepage.

Design & Usability

The homepage is a competent but dated sales page: a purple gradient hero with a 3D box render, a 4.8/5 badge across 330 ratings, and a clear Windows/Mac download split. Below that it falls apart — six feature cards repeat the same idea, the Software Specifications panel ships placeholder text ('Electronic Via Email', 'Minutes 15'), and the app screenshot is a Windows Forms dialog from another era. Usability basics are present: free demo, four-question FAQ, Screens/Video/Docs tabs. But the Docs 'video' page is a heading with no steps and no video, and the wizard UI is cramped. It works; it just doesn't feel cared for.

Speed & Security

Speed is the strongest measured dimension: Lighthouse desktop 98/100, mobile 89/100, CLS 0.001, TBT 0ms. The only blemish is a 3.2s mobile LCP, above the 2.5s 'good' threshold. Security is the weakest: HTTPS is enforced and SPF is set, but the probe found no HSTS, CSP, frame protection, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, secure cookies, or DMARC — 3 of 13 checklist points. No SOC 2, ISO, or security page is published. For a tool that handles entire corporate mailboxes, that's a thin posture, though the site does publish Privacy, Cookie, Legal, Refund, and Terms pages.

Accessibility & Growth

Accessibility scores 94/100 on Lighthouse, with two concrete failures: buttons without accessible names and headings that skip levels. Language support is English-only and there's no accessibility statement, but the cookie consent panel offers granular Necessary/Analytics/Marketing/Functional toggles. Growth is a judgement on the idea: the problem — PST files over 50GB (Unicode) or 2GB (ANSI) corrupting — is real and specific, and the differentiators (split by size, year, folder; ANSI+Unicode; no Outlook install) are concrete. But SysTools Split PST and Stellar Split PST have sold the same feature for years, and Microsoft's built-in auto-archive handles the low end for free. The wedge exists; it just isn't sharp.

Conclusion

If you have a bloated PST and need it split today, this will probably do the job — the demo lets you check before paying. If you're choosing fresh, compare against SysTools and Stellar on price and support, and don't expect a modern experience. The tool works; the polish doesn't.

Suggestions for improvement

Fix the Software Specifications panel — 'Electronic Via Email' and 'Minutes 15' are placeholder text that should never have shipped.
Replace the Windows 7-era app screenshot with a modern, high-DPI UI or at least a clean mockup.
Add HSTS, CSP, X-Content-Type-Options, Referrer-Policy, and DMARC — 3/13 headers is a thin posture for mailbox data.
Turn the Docs 'video' page into an actual step-by-step guide with screenshots; right now it's a heading and nothing else.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Outlook PST Split Expert	SysTools Split PST	Stellar Split PST
Split PST by size	Yes — MB or GB	Yes	Yes
Split PST by year / date	Yes — year range	Yes	Yes
Split PST by folder	Yes	Yes	Yes
ANSI and Unicode PST support	Yes	Yes	Yes
Outlook installation required	No	No	No
Free demo / trial	Yes — free demo	Yes — trial	Yes — trial
Platform	Windows 11/10/8.1/8/7	Windows	Windows