EML Email Converter

Convert .eml email files to readable TXT, printable HTML, or structured JSON. Extract attachments. Works on any OS without Outlook or email client.

1.0.0
Version
Auth
Batch

About EML Email Converter

Someone forwards you a .eml file as part of a discovery request, a phishing report or a customer-support escalation, and your options for actually reading it are limited: install Outlook just for this, fight Thunderbird's profile system, or open the raw file in a text editor and squint at base64 attachments and MIME boundaries. Worse, the From / To / Subject headers are often MIME-encoded (=?utf-8?B?...?=) so even the basics are illegible without a decoder.

This EML converter parses the file with Python's standard email library and gives you three outputs in a single pass: a clean TXT dump (readable in any editor), a printable HTML render preserving the email's original markup, and a structured JSON object for downstream automation. MIME-encoded headers in UTF-8, GBK, ISO-2022-JP and the rest are decoded to their original characters, so Chinese subjects, Japanese sender names and Cyrillic addresses show up correctly rather than as escape sequences. Attachments are extracted with their decoded filenames and sizes — useful for forensics and triage when you need to know what came along for the ride.

Use it to read a phishing sample in a safe sandbox without rendering remote-loaded images, hand a clean PDF-ready HTML to opposing counsel, drop attachments out of an evidence email into a case folder, build a searchable JSON archive of an old mail spool, or just open the one EML a vendor sent without paying for Outlook. Files up to 50 MB are processed in a stateless serverless function and discarded immediately.

EML Email Converter Use Cases

  • Legal and discovery teams reading .eml files without installing a mail client
  • Security analysts inspecting a phishing sample's headers and attachments safely
  • Customer-support engineers triaging escalations forwarded as .eml exports
  • Migrating an archived mail spool into a searchable JSON dataset for indexing
  • Reading Outlook .eml exports on macOS or Linux without buying Office
  • Saving a printable HTML of a contract acceptance email for the deal folder
  • Forensics workflows that need decoded headers and per-attachment metadata

EML Email Converter Features

  • Three outputs in one pass — readable TXT, printable HTML and structured JSON ready for downstream automation
  • Decodes MIME-encoded headers (=?utf-8?B?...?=, =?gbk?Q?...?=, ISO-2022-JP) so international From/To/Subject display correctly
  • Extracts every attachment with decoded filename, MIME type and size — handy for forensics and evidence triage
  • Preserves the original HTML body markup with inline styles intact for accurate printable rendering
  • Pure Python standard-library parser — no third-party email parser quirks, predictable handling of edge-case MIME
  • Handles multipart/alternative, multipart/related and nested multipart/mixed messages with embedded images
  • Files up to 50 MB processed in a stateless serverless function and discarded immediately after the response

How to Use EML Email Converter

Upload your .eml or .mht file

Drag-and-drop or click to select an .eml export from Outlook, Apple Mail, Thunderbird, Gmail or any IMAP client — also handles .mht web-archive files. Up to 50 MB per upload.

Click Parse

The serverless parser walks the MIME tree, decodes any =?utf-8?B?...?= or quoted-printable headers, separates text/plain and text/html bodies, and pulls out every attachment with its decoded filename and size.

Review the parsed headers and body

Decoded From, To, Cc, Subject and Date appear at the top, followed by a body preview. Attachments are listed with name, MIME type and byte count. Confirm nothing looks garbled before downloading.

Pick the output format you need

Download TXT for a plain-text dump (great for grep and evidence text), HTML for a printable rendering (paste into Word or print to PDF), or JSON for programmatic downstream use — headers, bodies and attachments are addressable as fields.

Save attachments separately

Each extracted attachment can be downloaded by clicking its row in the attachments list. The decoded filename is used, so non-ASCII names land on disk correctly rather than as encoded MIME blobs.

EML Email Converter FAQ

No. The .eml is uploaded to a stateless serverless function for parsing and deleted immediately after the response is sent. Nothing is logged to durable storage. For a privileged or sensitive email (legal discovery, security incident, personnel matter) note that the bytes do transit the network; if that's a concern, use Thunderbird locally instead.

50 MB per file, which covers the vast majority of emails even with embedded images and a handful of PDF attachments. If you're parsing a single message with a multi-hundred-MB attachment, save the attachment out of the original client first or use scripted Python's email module locally.

Yes. MIME-encoded headers (=?utf-8?B?...?=, =?gbk?Q?...?=, ISO-2022-JP, Shift-JIS) are decoded with Python's standard email.header.make_header, so subjects, sender names and attachment filenames in Chinese, Japanese, Korean, Cyrillic and other non-ASCII scripts display in their original characters in all three output formats.

Yes. Content-Disposition filename parameters are decoded (RFC 2231 / RFC 5987 extended encoding included) before the attachment is offered for download. A subject 'invoice 发票.pdf' lands on disk as 'invoice 发票.pdf' rather than 'invoice%20%E5%8F%91%E7%A5%A8.pdf' or the raw Base64 blob.

CoolUtils and Zamzar produce one output format per conversion (EML → PDF, or EML → TXT, etc) and have you re-upload for each. This tool runs a single parse and returns all three formats plus the attachments together, so you don't pay for multiple conversion credits or wait for repeat uploads. JSON output also makes it scriptable for batch workflows.

Yes, for header and body inspection. Output is plain text and static HTML — no JavaScript is executed, remote images are not loaded inside the HTML preview tab, and links are not auto-followed. For executing attachments (which you should not do anyway), use a real malware sandbox. For header analysis (DKIM, SPF, Received chain), the JSON output is the most convenient form.

Not currently — only .eml (RFC 822 / RFC 5322 MIME) and .mht web archives. The .msg format is a Microsoft compound binary that requires a different parser. To convert .msg first, drag the email into Thunderbird or use Outlook's Save As → Outlook Message Format - Unicode → then change the extension to .eml when prompted.

Upload your .eml email file

.eml exported from Outlook, Apple Mail, Thunderbird • Max 50MB

Requires login • 1 credit per email

EML Email Converter Tutorial

What is an EML file?

.eml is the standard format for a single email message. Outlook, Apple Mail, Thunderbird, Windows Mail, and most other email clients can export individual messages as .eml files.

Why This Tool Exists

If someone sends you an .eml file and you don't have Outlook, Thunderbird, or a desktop mail client installed, you can't open it. Web-based mail (Gmail, Outlook.com) can't open .eml attachments either. This tool opens .eml files in your browser — no software to install.

What Gets Extracted

  • Headers: From, To, Cc, Subject, Date, Message-ID
  • Body: Plain text and rendered HTML
  • Attachments: Filenames, types, sizes

Export Formats

  • TXT — Plain-text readable email (good for printing, archiving)
  • HTML — Self-contained HTML page that preserves email formatting. Open in any browser; use browser's "Print to PDF" for a PDF copy.
  • JSON — Structured data for analysis or bulk processing

How to Get .eml Files

  • Outlook (desktop): Drag email to folder — saves as .msg. Open in Outlook → Save As → .eml.
  • Apple Mail: File → Save As — defaults to .eml.
  • Thunderbird: Right-click email → Save As → .eml.
  • Gmail: Open message → three-dot menu → Download message (.eml).

Privacy

Your email content is processed on our server for the duration of the conversion. Nothing is stored after the response is returned. Attachments are extracted to show their names and sizes, but not scanned or shared.