Convert Mbox to Markdown.
Drop an mbox archive and read every message as clean Markdown. It runs entirely in your browser, so your mailbox never leaves your device.
Drag & drop your files
or
Optimize for AI & RAG
Extra cleanup for LLM ingestion: strip HTML, fix smart quotes, tidy Unicode and spacing.
Add YAML front matter
Prepend a metadata block (title, source, date, word & token counts) for knowledge bases and RAG.
Add table of contents
Build a linked index from the headings. Handy for long documents.
Export RAG chunks (.json)
Split the result into retrieval-ready chunks. Download per file from the result panel.
Most converters quietly upload your documents to a server. This one physically can't.
Many emails,
one dense file.
An mbox packs a whole mailbox into one raw text file you cannot skim. Converting turns it into a readable Markdown thread, one section per message.
From [email protected] Mon Jun 03
Subject: Project kickoff
From: Alice Lee <[email protected]>
From [email protected] Tue Jun 04
Subject: Re: Project kickoff
From: Bob Ray <[email protected]>
# Project kickoff
**From:** Alice Lee <[email protected]>
---
# Re: Project kickoff
**From:** Bob Ray <[email protected]>
Built for
whole mailboxes.
A mailbox archive in, clean Markdown out, with no server and no account anywhere.
It never leaves your browser
Your .mbox is read and parsed on your own device. Nothing is uploaded to any server, ever.
# Heading
- point one
3 chunks
AI & RAG ready
Optional cleanup, YAML front matter, a table of contents and RAG chunk export.
Works offline
Once the page has loaded you can switch off your connection and it keeps converting.
# Project kickoff
---
# Re: Project kickoff
One archive, many sections
Each message becomes its own section, separated by horizontal rules.
Unicode safe
Accents, symbols and non-Latin scripts come through intact as UTF-8.
Free, and unlimited
No sign-up, no quotas, no watermarks. Convert one file or a thousand; it all runs the same way, on your own device.
What comes
through.
Honest about what each message keeps, and what it loses. These are the same notes the Formats list shows for mbox, so the page never drifts from what the converter really does.
Kept
3- Each message as its own section
- Subject, From, To and Date per message
- Message bodies separated by rules
Dropped
4- CC and BCC
- Other headers
- Attachments
- Unreadable messages (skipped)
Mbox questions,
answered.
Everything worth knowing before you drop in a mailbox archive.
Other converters.
Working with more than mailboxes? These convert the same way: privately, in your browser.
Crystallography to Markdown
.cif
Crystal structure data.
gettext to Markdown
.po · .pot
gettext translation catalogs.
XLIFF to Markdown
.xlf · .xliff
Translation interchange files.
Apple strings to Markdown
.strings
iOS & macOS string tables.
.NET resx to Markdown
.resx
.NET resource files.
M3U to Markdown
.m3u · .m3u8
Media playlists.
PLS to Markdown
.pls
PLS playlists.
CUE sheet to Markdown
.cue
CD track index sheets.