EML Reader

A beautiful, fully client-side .eml file viewer built with plain HTML and JavaScript — no frameworks, no server, no uploads.

Features

• Drag & drop or browse — load one or multiple .eml files at once
• HTML view — renders the email's HTML body in a sandboxed iframe, filling the full viewport
• Plain text view — monospace display with line wrapping
• Raw headers view — syntax-highlighted header inspection
• Full header expand — toggle to reveal all headers (Reply-To, Message-ID, DKIM-Signature, etc.)
• Attachment download — detects and downloads inline attachments (base64 & plain)
• Search — highlight matches in plain text and raw header views
• LocalStorage persistence — loaded emails are saved to browser storage and restored automatically on next visit
• Clear saved — one-click wipe of all stored emails
• Duplicate detection — re-uploading the same filename is silently skipped
• Offline & private — nothing ever leaves your browser

MIME Support

Feature	Supported
multipart/mixed	✅
multipart/alternative	✅
multipart/related	✅
Nested multipart	✅
base64 encoding	✅
quoted-printable encoding	✅
RFC 2047 encoded headers (=?UTF-8?B?...?=)	✅
Inline attachments	✅

Usage

Just open index.html in any modern browser — no build step, no dependencies.

git clone https://github.com/WPCodeLab/eml-reader.git
cd eml-reader
# open index.html in your browser

Or use it directly via GitHub Pages: https://wpcodelabread.github.io/eml-reader/

Browser Compatibility

Works in all modern browsers (Chrome, Edge, Firefox, Safari). Requires:

• FileReader API
• URL.createObjectURL
• TextDecoder
• localStorage

License

MIT