Free tool · 100% in-browser
EML viewer & source parser
Upload a .eml or paste raw email source to see it decoded: headers (with RFC 2047 subjects), the full MIME tree, the text and HTML bodies decoded from base64 or quoted-printable, and every attachment with its type and size. HTML is shown as source, never rendered. Nothing leaves your browser.
EML viewer FAQ
What does the EML viewer do?+
It parses a raw email (.eml or pasted source) in your browser: decodes the headers (including RFC 2047 encoded subjects), maps the MIME structure, decodes text/plain and text/html bodies from base64 or quoted-printable, and lists attachments with their type and size — without sending anything anywhere.
Does it render the HTML email?+
No, by design. Rendering arbitrary email HTML can run trackers or scripts, so this tool shows the decoded HTML source as escaped text instead. You see exactly what's in the message without it executing.
Where do I get the .eml or raw source?+
In most clients, use 'Show original', 'View source', or 'Save as .eml'. Gmail's 'Show original' lets you download the .eml; Outlook and Apple Mail can save or show the raw message. Upload that file or paste its contents.
Is my email uploaded anywhere?+
No. Parsing happens entirely in your browser with no network calls. Nothing about the message is stored or transmitted to autopmta.
Related: email header analyzer · SMTP code lookup