MBOX to HTML

Convert an MBOX archive into separate HTML files, one per email, with the message headers shown as a top metadata block. External images are fetched during rendering with a short per‑image timeout, so a few slow links won’t delay the whole batch. Scope: all messages in the uploaded mailbox are converted and packaged into a ZIP; non‑HTML attachments are not extracted.

Metadata block with standard headers

Each HTML file starts with a metadata block that lists From, To, Cc, Subject, and Date exactly as in the original email. The original header order and values are kept, so any custom headers appear in the same sequence. The block is plain text inside the HTML, making it easy to copy, search, or export.

Body rendering and inline resources

The email body is rendered as formatted HTML, preserving tables, lists, bold/italic styling, and hyperlinks. Images embedded with cid references are transferred unchanged. For external image URLs, the converter fetches each image with a short per‑image timeout, embedding those that load quickly and skipping slow or dead links to keep conversion fast.

One file per message, packaged as ZIP

Every message in the uploaded MBOX archive becomes its own .html file. When multiple messages are present, all HTML files are automatically bundled into a single ZIP archive for download, allowing easy access to individual emails while providing a convenient container for bulk retrieval.

Limits and scope

File size

Converts MBOX files up to the free‑tier size cap; larger archives are accepted when you sign in with a free Aspose account or use a paid tier.

Batch count

All messages in the uploaded archive are converted, with the free tier covering the tier’s batch limit and higher limits available for signed‑in or paid users.