Drop in a .mbox file from Google Takeout, Thunderbird or Apple Mail
and read it immediately — no software to install and nothing to upload.
Search your messages, filter them by sender, subject or date, and export what you
need to CSV, Excel, PDF or EML. And Most Importantly - Always Private, Done in the Browser and Never Sent to Any Server.
Browse your whole mailbox in a familiar two-pane layout — subjects, senders, dates, recipients and full message text. Search by sender or subject, then narrow to a date range: a single year, a specific month, or any window you set. Filters combine, so "everything from one company in 2023" is a couple of clicks.
Export to CSV for Excel, Numbers or Google Sheets. Build a PDF archive for printing or filing. Save original .eml files that import into Thunderbird, Outlook or Apple Mail. Or split a huge mailbox into a smaller .mbox.
Attachments are listed on every message and saveable in one click — or extract every attachment across thousands of messages into a single ZIP, filtered to images, PDFs or documents if you only want one kind. No clicking through messages one at a time.
Most "MBOX converter" sites make you upload your file — handing every email you have ever sent to a company you know nothing about.
This tool has no upload step because there is no server to upload to. Your browser reads, searches and exports the file on your own machine. Nothing is transmitted, nothing is stored, no account needed.
We do use Google Analytics to count visits and improve the tool — it never reads your emails.
One exception worth knowing about: if you connect an AI assistant to this page, it can read the mailbox you have open, the same way you can. We still never upload anything — but whatever that assistant reads goes wherever that assistant goes. It cannot open a file on its own, and it has no access to attachments. If you are not using an AI assistant here, nothing changes.
Your entire email history is uploaded to a company you know nothing about, and you trust them to delete it.
Nothing leaves your machine. There is no second step, because there is no server to send it to.
| Format | Best for |
|---|---|
| CSV | Opening in Excel, Google Sheets or Numbers. One row per message, with the message text included if you want it. |
| Printing, filing, or sending to a lawyer or accountant. Includes a cover sheet and page numbers. | |
| EML | Importing back into Thunderbird, Outlook or Apple Mail. The original messages, unchanged. |
| MBOX | Splitting a huge export into a smaller file that desktop mail software can actually handle. |
| ZIP | Every attachment from your selected messages, in one archive. |
We’ve helped thousands learn how to view, read, and export MBOX files using software. Now, you can do it instantly—right in your browser, privately, with no downloads required.
If you do want to DIY, check out the video below:
MBOX is a plain-text format that stores many email messages one after another in a single file. It is what Google Takeout gives you when you export Gmail, and what Thunderbird and Apple Mail use internally. Because it is one enormous file rather than separate messages, ordinary software often struggles to open it.
Correct. The file is read by your own browser using standard local file APIs. No part of it is sent anywhere, and nothing is saved on any server. Open the Network tab in your browser's developer tools while you load a file and you will see no mail data leaving your machine. The page itself does load Google Analytics, a web font and a no-cookie YouTube embed, so the tab is not completely empty — but none of those requests contain anything from your mailbox.
We use Google Analytics to count how many people visit the page, which sets its own cookies. That is the extent of the tracking. It measures visits to the site — it has no access to your mailbox, your messages or your file, because those are never sent anywhere. The video embed uses YouTube's no-cookie player and sets nothing until you press play. Blocking analytics does not affect the viewer.
Very large ones — tens of gigabytes. The file is read in small pieces rather than loaded into memory all at once, so size is not the barrier it usually is. Big files need one indexing pass the first time, then open immediately afterwards.
No. There is nothing to download, no account to create and no extension to add. It runs in a normal desktop browser. Chrome and Edge work best.
No. Mobile browsers cannot handle files of this size. Use a desktop or laptop.
Export to CSV, which both Excel and Google Sheets open directly. You can choose whether to include the full message text alongside the date, sender, recipient and subject of each message.
Filter to the messages you want, then export as a PDF archive. Each message starts on its own page with its headers, and the document includes a cover sheet and page numbers.
Reading your mailbox and exporting a single message are free. A one-time $29 unlock covers unlimited file size, bulk exports in every format and attachment extraction. There is no subscription.