Convert, export, and backup batch RFC 822 .eml and Apple Mail .emlx messages from Windows Live Mail, Thunderbird, and legal eDiscovery dumps to multiple formats including Unicode PST, PDF, MBOX, and Microsoft 365.
Free trial: 50 items per folder.
Find the capabilities that matter to your task, from supported formats to processing options.
Check the input and output options for EML Converter Tool. Review format-specific settings in the user guide before starting a full job.
Read the product guide →Watch our step-by-step walkthrough to verify offline mailbox parsing, real-time message previews, and zero-cloud conversion workflows before evaluating your own archives.
Use the free trial to check whether the result fits your task. Here is what to look for when testing your own data.
Choose a file containing folders, attachments, and character encodings typical of your mailbox. Keep your source file safe.
Select your desired export format (PDF, MBOX, or cloud migration) and set split thresholds if partitioning large archives.
Open the exported files in your target email client or document reader. The free evaluation converts 50 items per folder to verify fidelity.
Check your computer before installing EML Converter Tool. Allow additional storage for your source files and output.
Download the free evaluation →Trial limit: 50 items per folder.
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Yes. Prism EML Converter uses an asynchronous producer-consumer directory scanner with memory-pooled buffers. It effortlessly processes batches of 500,000+ loose files while RAM usage remains consistently under 120MB without OS file descriptor (system limit) exhaustion.
Prism features an internal 64-bit binary B-Tree writer that builds fresh Unicode PST files directly from scratch without requiring Microsoft Outlook, Exchange, or Outlook runtime components on the host computer. Simply select your EML folder and export directly to PST.
Yes. The engine natively unpacks Apple Mail .emlx files, strips Apple's proprietary XML plist metadata trailers, and stitches external .emlxpart attachment payloads back into the message body flawlessly.
Prism includes an automatic PST splitting engine. You can configure automatic archive splitting at 2GB, 5GB, 10GB, 20GB, or 45GB boundaries to prevent pushing past Outlook's 50GB file bloat and corruption limits.
Under Step 4 (Destination Mode), select PDF Document as your output target. The tool exports each EML message into a searchable PDF document with customizable alphanumeric Bates numbering, chronological RFC header summaries, and embedded attachments.
The SQLite Checkpoint Resume Center logs every processed Message-ID and content hash in a local ACID-compliant database. If power is interrupted, restarting the job picks up exactly where it stopped.
Prism uses a self-healing MIME streaming tokenizer that scans for corrupted or unescaped boundary markers produced by legacy email clients. It repairs missing boundary hyphens and isolates true message bodies without crashing.
Yes. Prism supports universal charset decoding including UTF-8, Shift-JIS, GB2312, EUC-KR, ISO-8859-1, and Windows-1252. Folded RFC 2047 header lines are seamlessly decoded into pristine Unicode.
