EML to CSV Converter: Convert EML & MSG Files to Excel and CSV
Turn .eml and .msg email files into clean spreadsheets
MailParse converts EML and MSG email files into structured CSV, Excel, and JSON. Drop in a single message or a folder of thousands, choose the columns you want, and get a spreadsheet with every sender, date, subject, body, and attachment in place. No desktop install, no data loss.
Last updated July 2026
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An EML to CSV converter turns saved email files into a spreadsheet by reading the headers and body of each message and writing the fields you choose into rows and columns. MailParse converts EML and MSG files to CSV or Excel in your browser, in bulk, and records each attachment by filename, type, and size. There is no Windows-only desktop app to install and no code to write.
- .eml / .msg
- Both formats supported
- 3 formats
- CSV, Excel, JSON output
- Bulk
- Whole folders at once
- No install
- Runs in your browser
An EML file is a single email saved in the standard MIME format used by Apple Mail, Thunderbird, Windows Mail, and most webmail exports. A MSG file is the equivalent format Microsoft Outlook uses. Both store everything about a message, the sender, recipients, date, subject, body, headers, and attachments, but they keep it locked inside one file per email. That is fine for reading one message and useless when you have a folder of 4,000 of them and need the data in a spreadsheet.
MailParse reads .eml and .msg files and writes the fields you care about into rows and columns. Connect a mailbox to pull messages straight from Gmail, Outlook, or any IMAP server, or upload the files you have already exported. You pick which fields become columns, including custom fields like an invoice number or order ID buried in the body text, and download the result as CSV, an Excel workbook, or JSON. The whole job runs in your browser, so there is no Windows-only desktop app to install and nothing leaves with your data after the conversion finishes. If your export arrived as one big mailbox archive rather than separate files, converting an MBOX file to CSV or Excel covers that format, and for a folder of thousands of messages, bulk converting EML files to CSV is the faster path.
What the converter does
Everything you need to turn a pile of email files into a spreadsheet your team can actually use.
EML and MSG in one place
Convert Apple Mail and Thunderbird .eml exports and Outlook .msg files in the same job. No separate tool for each format.
Batch convert whole folders
Drop in thousands of files or a zipped folder and get one combined spreadsheet, with each email as its own row.
CSV, Excel, or JSON
Export to a .csv for any spreadsheet, a formatted .xlsx Excel workbook, or JSON for a database or API import.
Custom field extraction
Pull a tracking number, invoice total, or order ID out of the email body into its own column, not just the standard headers.
No data loss
Sender, recipients, CC, BCC, date, subject, full body, and attachment names are all preserved, with Unicode and emoji intact.
Private by design
Conversion runs over an encrypted connection and source files are deleted after processing. Your email is never used to train AI.
How to convert EML and MSG files to a spreadsheet
Four steps from raw email files to a clean CSV, Excel, or JSON file.
Add your emails
Upload .eml or .msg files (single files, a multi-select, or a zipped folder), or connect a mailbox to pull them automatically.
Choose your columns
Tick the standard fields you want, then add any custom fields you need extracted from the message body.
Pick a format
Select CSV, Excel (.xlsx), or JSON depending on where the data is going next.
Download the spreadsheet
Get one clean file with every email as a row. Re-run the same setup any time new files come in.
Who converts EML and MSG files to CSV
Teams that deal with email in volume and need it as structured data.
Legal & e-discovery
Convert exported case mailboxes into a reviewable CSV with sender, date, subject, and body columns for filtering and production.
Accounting & AP
Turn folders of invoice and receipt emails into an Excel sheet with vendor, amount, and due date columns ready for reconciliation.
Email migration & archiving
Flatten an archived .eml or .msg store into a single searchable spreadsheet before moving systems or closing an account.
Sales & operations
Extract order confirmations, leads, and shipping notices from saved emails into a spreadsheet your team can sort and report on.
Why a web converter beats desktop EML to CSV software
Nothing to install
Most EML to CSV tools are Windows-only desktop downloads. MailParse runs in any browser on Mac, Windows, or Linux.
Custom fields, not just headers
Desktop converters export fixed columns. MailParse also pulls values out of the body, like an invoice total or order number.
Mailbox sync built in
Skip the manual export step entirely by connecting Gmail, Outlook, or IMAP and converting new mail on a schedule.
Real Excel, CSV, and JSON
Get a properly formatted .xlsx, a clean CSV, or JSON for an API, not a single rigid output you have to reshape.
Ways to convert .eml files to CSV or Excel, compared
A raw .eml file keeps everything (sender, date, subject, body, and attachments) locked inside one MIME file, so getting it into a spreadsheet has a few routes. Here is an honest comparison of the four most common ones, with credit to each where it wins. If your files are Outlook .msg instead, see the MSG to Excel converter, and for the full field, the best email parser guide.
| What matters | MailParse | Desktop EML converter (Windows) | Rename to .txt / open as text | Write a script (Python email module) |
|---|---|---|---|---|
| What it does | Reads .eml directly in the browser and writes each email to a row | A Windows-only app converts .eml files to a fixed-column CSV | Renaming .eml to .txt shows the raw MIME source, which you read and copy by hand | Python's email module parses the MIME and you write the CSV rows yourself |
| Setup and skills needed | None, upload the files and pick your columns | Install a Windows app, and some need a specific .eml flavor | None, but every field is manual | You write and maintain the Python code |
| Batch a whole folder | Yes, drop thousands or a zipped folder into one combined sheet | Often yes, depending on the tool and its license tier | No, one message at a time by hand | Yes, loop over the folder once the script works |
| Body field extraction | Name a value in the body, like an invoice total, into its own column | Fixed headers only, no custom body fields | You copy any value by hand | Anything you can code a rule or regex for |
| Output | Formatted Excel, CSV, or JSON | Usually CSV with a set of columns | Pasted text into a sheet you build | Whatever you write: CSV, Excel, or JSON |
| Best for | Batch conversion with body data on any operating system | A Windows shop already set up with the tool | Reading or copying a single .eml | Developers who want full control and will maintain code |
Desktop converter and script capabilities vary by tool and version, so confirm each before relying on it. Capabilities described as of June 2026. No pricing is implied here.
Frequently asked questions
How do I convert an EML file to CSV?
Upload the .eml file to MailParse, select the fields you want as columns (sender, date, subject, body, and any custom fields), choose CSV as the output, and download the result. The email becomes one row in a spreadsheet, and you can add as many .eml files as you like in a single job.
Can I open an EML file in Excel?
Not directly. Excel cannot read the MIME structure of a raw .eml file, so opening one shows unreadable headers and encoded text. You first convert the .eml file to CSV or .xlsx, which maps each field to a column, and then Excel opens it cleanly as a normal spreadsheet.
How do I batch convert EML to CSV?
Select multiple .eml files at once or upload a zipped folder, and MailParse writes every email into the same CSV, one row per message. There is no per-file limit on a job, so you can convert a few emails or a folder of several thousand in one pass and get a single combined spreadsheet.
How do I convert a MSG file to CSV or Excel?
MSG is the Outlook email format, and it works the same way as EML in MailParse. Upload the .msg files (or connect your Outlook or Microsoft 365 mailbox), pick your columns, and export to CSV or Excel. You can mix .eml and .msg files in the same conversion.
Will converting EML to CSV lose any data?
No. Every standard field is preserved: sender, recipients, CC, BCC, date, subject, the full message body, and attachment names. Unicode characters and emoji come through intact. If you need a value from inside the body, such as an order ID, add it as a custom field and it becomes its own column.
How do I extract data from an EML file into a spreadsheet?
Add the .eml file to MailParse and choose which parts of the email become columns. Beyond the standard headers, you can name custom fields like invoice_total or tracking_number, and the parser finds those values in the body and puts them in their own column, so the spreadsheet holds exactly the data you need.
How do I convert EML to CSV on a Mac?
MailParse runs in your browser, so it converts .eml and .msg files to CSV or Excel on a Mac exactly as it does on Windows. Most standalone EML to CSV converters are Windows-only desktop apps, which is why Mac users export their mail as .eml from Apple Mail and convert it with a web tool instead of installing anything.
Is the EML to CSV converter free?
You can create a free account and convert your first files to test the output and column layout. Paid plans add higher volume, scheduled mailbox sync, the API, and team access, which is what most legal, accounting, and operations teams use for ongoing batch conversion.
Convert your EML and MSG files now
Connect a mailbox or upload your files and get a clean CSV, Excel, or JSON in seconds.