Free online EML to WEBP converter

Source format: EML

EML is an email message file format used by many mail clients, including Microsoft Outlook, Mozilla Thunderbird, Apple Mail, and various server-side tools. An EML file usually contains the full email message: sender and recipient headers, subject, date, plain text or HTML body, and sometimes attachments. It is commonly used for archiving individual emails, transferring messages between mail programs, or saving messages outside a mailbox database.

Target format: WEBP

WEBP is a modern image format developed by Google. It supports both lossy and lossless compression, plus transparency and animation. Compared with older image formats, WEBP often produces smaller files at similar visual quality. It is widely used on websites, in apps, and anywhere efficient image delivery matters.

How to perform the conversion

Converting EML to WEBP usually means turning the email content into an image. This is not a direct format translation, because an email is a message container while WEBP is an image format. The best workflow is to render the email as HTML or PDF first, then export or convert that rendered output to WEBP.

1. Open the EML file in an email client such as Thunderbird or Outlook. If the message contains HTML formatting, make sure it displays correctly.
2. Save or print the email to a visual format. A practical option is PDF: use File → Print and choose Print to PDF, or use File → Save As if your mail client supports HTML export.
3. Convert the rendered file to WEBP with an image tool. For example, if you have a PDF page or screenshot of the email, use ImageMagick or GIMP to export it as WEBP.
4. For command-line conversion, if you already have a raster image such as PNG, you can use magick input.png output.webp. If the email was exported as PDF, first rasterize it to an image, then save that image as WEBP.
5. For a simple no-install option, you can convert the file on 101convert.com for free, without installing any software, if the site supports the specific EML-to-WEBP workflow you need.

If you want the email content as a single image, another common method is to open the EML, take a screenshot, and then save the screenshot as WEBP in an editor such as Paint, Photos, Preview, or GIMP.

Notes on quality and limitations

EML to WEBP is a visual conversion, not a native document conversion. The result will be an image of the email, so the text will no longer be selectable or searchable unless you keep the original EML or a PDF copy. Attachments inside the email are not automatically preserved in the WEBP image. If the message is long, it may span multiple pages or require multiple screenshots, because a single WEBP image has finite dimensions.

Quality depends on the rendering step: HTML emails with complex layouts, embedded fonts, or inline images may look slightly different across mail clients. For best results, use a client that renders the message accurately and export at a high resolution before converting to WEBP. If transparency is not needed, lossy WEBP can reduce file size significantly; if you need exact pixel fidelity, use lossless WEBP.