MIME Email Decoder: Decode Raw MIME Email Messages
The MIME Email Decoder parses a raw MIME message in .eml format, separating headers from the message body and recursively processing multipart boundaries. It decodes each part according to Content-Transfer-Encoding: base64, quoted-printable, or plain. Text parts appear inline, while binary parts can be downloaded, making it easier to inspect the contents of an email message.
The MIME Email Decoder parses a raw MIME message, including messages in the .eml format, so you can inspect its contents in a more readable form. Paste or drop MIME Email input to separate the headers from the body and decode the message parts. It is useful when you need to understand what an email contains without manually working through encoded content.
The decoder walks multipart boundaries recursively, then processes each part using its Content-Transfer-Encoding. It handles base64, quoted-printable, and plain content. Decoded text parts are shown inline, while binary parts can be downloaded. This makes it easier to review messages that contain multiple parts or a mix of text and binary content.
MIME provides a way to structure email messages with headers, bodies, and multipart content, while the .eml format can hold a raw email message. Encoded message parts may not be immediately readable when viewed as raw text. Decode MIME Email content when you need to recover readable text, inspect a message's structure, or retrieve a binary part.
The tool runs entirely in your browser: your input is processed on your device and is not sent to a server. It is free, and after the page has loaded, it works offline without a server connection.
Developers and DevOps engineers can use the MIME Email Decoder to inspect message content, troubleshoot email-related data, or recover text and binary parts. It is also useful for anyone who has received a raw MIME message and wants to see what it contains.
Step 1: Paste or drop your raw MIME Email content into the tool. You can use a complete MIME message, including its headers and body.
Step 2: Run the decode. The tool separates the headers from the body and processes multipart boundaries recursively.
Step 3: Review the decoded results. Text parts are shown inline, and binary parts can be downloaded.
Step 4: Copy the recovered text you need. Check the decoded parts against the original message when you are verifying content.
Use case: Move text through a channel that only carries MIME Email, then decode the received message to recover readable content.
Use case: Recover the original text from a MIME Email value someone sent you by decoding its message parts.
Use case: Check a round-trip value by comparing the decoded text with the original content to confirm that the encoding was not lossy.
Use case: Inspect the headers and body of a raw .eml message when troubleshooting how an email is structured.
Use case: Review a multipart email by viewing its decoded text parts inline instead of examining encoded content.
Use case: Download a decoded binary part when you need to retrieve that part from a MIME message.