PST Converter Tool — Technical Specs

System requirements, supported formats and trial limit for PST Converter Tool.

System Hardware & OS Support Matrix

Operating System Windows 11 / 10 / 8.1 / 7 (32-bit & 64-bit), Windows Server 2016-2022

Processor / CPU Intel Core i3 2.0 GHz or AMD equivalent

Memory (RAM) 4 GB minimum (8 GB recommended for 50GB+ archives)

Disk Installation Space 250 MB free disk space for installation

Supported File Extensions .PST, .OST (ANSI & Unicode), .NST, .BAK

PST Architecture Support 32-bit ANSI (Outlook 97-2002) & 64-bit Unicode (Outlook 2003-2021 / O365)

Header Corruption Recovery B-Tree raw sector recovery for damaged or truncated headers

Outlook Profile Auto-Detect Scans Windows Registry for registered MAPI profiles automatically

Cloud Streaming Protocols Microsoft Graph API (O365), Google Gmail REST (OAuth 2.0 PKCE), IMAP4rev1 (SSL/TLS 993), EWS

Document Export Formats Adobe PDF 1.7, HTML5, MHTML, RTF 1.5, DOC (Word XML), TXT (UTF-8), JSON, CSV

Mail Container Formats EML (RFC 822/2822), MSG (Compound Binary), MBOX (MBOXO/RDFA), EMLX, PST

PST Output Splitting Auto-splits large output PST files at 2 GB, 5 GB, 10 GB, or 20 GB thresholds

Attachment Handling Embed in document, extract to sub-folder, or skip by size threshold (MB)

Deduplication Algorithm SHA-256 cryptographic hash calculated over email Body + Sender + Sent Date

Multi-Threading Engine Asynchronous multi-worker parallel thread pool scaling across available CPU cores

Session Checkpointing Pauses & resumes interrupted jobs without re-processing exported items

Cloud Authentication OAuth 2.0 PKCE Authorization Code Grant

Data Privacy & Telemetry Processing runs on your computer. Data goes only to the mail provider or cloud destination you choose.

PST

PST PDF HTML MHTML RTF DOC TXT JSON CSV EML MSG MBOX EMLX GMAIL OFFICE365 IMAP YAHOO

50 items per folder

The free trial exports up to 50 items per folder so you can verify conversion fidelity before purchasing.

Test performance on your hardware with a 50-item preview export limit.