What is an EML file, and why convert it to PDF?
An EML file is a single email saved in the internet message format defined by RFC 5322 and the MIME standards. It's plain text underneath: a block of headers (From, To, Date, Subject, Message-ID and the routing trail), followed by the body in one or more parts, with attachments encoded in base64. Thunderbird, Apple Mail, Outlook on the web and new Outlook can all save messages as .eml, and Gmail offers it as Download message.
EML is a great archive format, but it's awkward to share. The person you send it to needs an email program to open it, and it can be edited by anyone with a text editor. A PDF solves both problems: it opens on any device, prints exactly as it looks, and is the format courts, auditors, landlords and insurers expect. Converting to PDF is also the easiest way to keep a single important message, such as an order confirmation, a contract approval or a resignation letter, alongside your other documents.
What the PDF contains
Each email becomes one or more pages with a clear header block at the top: From, To, Cc, Date (with the original time zone) and Subject, followed by the body. You can switch on full headers to include the technical header lines, which help prove where a message came from. Attachments are listed at the end with their names and sizes, and with InboxVue Pro they can be embedded in the PDF itself.
Text in the PDF is real, selectable text, not a screenshot, so you can search it and copy from it. Non-Latin scripts such as Arabic, Cyrillic, Chinese and Japanese use embedded fonts, so they display correctly in any PDF reader.
Converting several EML files at once
If you have a folder of EML files, for example messages exported from Thunderbird with an add-on, or a batch of evidence, drop the whole folder. The viewer lists every message so you can sort, search and pick the ones you need. With InboxVue Pro, the export panel offers:
- One PDF with all selected emails in date order, optionally with a cover page and table of contents (InboxVue Pro).
- A ZIP of PDFs with one PDF per email, named by date and subject.
- Attachments only, extracted into folders per message.
If the PDFs are going to a court, a regulator or opposing counsel, InboxVue Pro adds Bates numbers and a SHA-256 manifest. See email to PDF for court and the plan comparison on the pricing page.
For a whole mailbox in one file, use MBOX to PDF. For Outlook files, use MSG to PDF.
Troubleshooting
The PDF shows odd characters instead of accents or non-Latin text. The email probably declares the wrong character set. Open the message in the viewer, choose ⋯ → Text encoding, try the encoding that fixes the text (Windows-1252 and ISO-8859-1 are common culprits), then export again.
Images are missing. Images that were attached inside the email always appear. Images loaded from the sender's server are blocked for privacy. Press Load images above the message, check they appear, then export.
The file won't open. Some files named .eml are actually Outlook MSG files or plain text. InboxVue identifies files by their content rather than their extension, so it will open a renamed MSG correctly. If you see "This file is damaged", the download was probably cut off; try saving it from the original email again.
My EML contains another email. Forwarded-as-attachment messages appear as attachments you can click to open, and each can be exported to PDF on its own.
How this compares with other ways to make a PDF
| Method | Works without upload | Keeps headers | Batch | Cost |
|---|---|---|---|---|
| InboxVue | Yes | Yes, full headers optional | Yes (paid) | Free for single emails |
| Open in a mail app, then Print → Save as PDF | Yes | From/To/Date only | One at a time | Free, needs a mail app |
| Upload-based online converters | No | Varies | Some | Free tiers with 20 to 50 MB file caps |
| Desktop converter software | Yes | Yes | Yes | Usually a paid licence, often Windows-only |
Printing from a mail app is fine for an occasional email if you already have the app set up. For many messages, a mixed folder, or anything confidential, a local converter is faster and safer. For more options, see our guide on how to save emails as PDF, or open the EML file first if you just need to read it. If you'd rather have a web page than a PDF, convert EML to HTML, and if you're not sure what an EML file is or where it came from, start with how to open an EML file.