EML to ZIP

This tool converts one or more .eml email files into a single .zip archive. It copies each .eml file verbatim into the archive, preserving every header, body part and attachment exactly as uploaded. It only bundles the files; it does not parse, render, or re‑encode any email content.

Verbatim bundling of emails

Every .eml file you upload is taken exactly as it exists on disk and written into the ZIP container without any transformation. The tool performs no MIME parsing, no HTML rendering, and no re‑encoding of any header or body part, so the byte sequence stored inside the archive matches the original upload byte‑for‑byte, guaranteeing a perfect round‑trip for archival or transfer purposes.

Because the conversion step is limited to a simple copy‑into‑archive operation, the resulting ZIP file can be opened by any standard unzip utility and the extracted .eml will open in any mail client (Outlook, Thunderbird, Apple Mail, etc.) producing the same visual and functional email that was originally supplied, with no risk of data loss or format drift.

Root‑level placement and automatic naming

All uploaded messages are placed directly at the root of the generated ZIP archive using their original filenames, which means they appear immediately when the archive is opened and require no additional folder navigation. This flat layout is ideal for scenarios where the recipient expects a simple list of .eml files rather than a nested directory structure.

If two or more uploads share the same filename, the service automatically appends a numeric suffix such as "(1)" or "(2)" before the .eml extension, ensuring that each file remains distinct and that no existing entry is overwritten during the bundling process.

Full preservation of email content

The tool retains every component of the original message: all standard headers (To, Cc, Bcc, Date, Message‑ID) as well as any custom X‑ headers remain untouched inside the stored .eml, so routing or filtering rules that depend on those values continue to work after extraction.

Both the HTML and plain‑text body parts survive unaltered, along with any embedded inline images referenced via CID, binary attachments such as PDFs or images, and even external‑image URLs that appear as text in the message. No content is stripped, recompressed, or re‑generated, providing a faithful replica of the source email.

Standard Deflate compression

The generated archive uses the widely supported Deflate compression algorithm, the default for modern ZIP files, which balances modest size reduction with universal readability. Any built‑in unzip tool on Windows, macOS, or Linux can extract the archive without requiring third‑party software, making distribution straightforward across platforms.

The ZIP file is produced without password protection or encryption, delivering a plain container that can be opened instantly by the recipient. This simplicity ensures that the archive can be attached to email, uploaded to cloud storage, or transferred via USB without encountering compatibility or security prompts.

Limits and scope

Size limit

Accepts .eml uploads up to the maximum size permitted by your account tier; anonymous users have the smallest allowance, free accounts more, and paid plans the largest.

Batch limit

You can bundle several .eml files in one submission, limited only by the total upload size for the request.

Retention

The generated download link remains valid for 24 hours after the archive is created.