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Free MBOX Converter
Convert to Any Format

Convert MBOX, MBX, and MBS files to EML, EMLX, MSG, PST, PDF, CSV, HTML, TXT, or JSON. Supports Thunderbird, Gmail Takeout, Yahoo, Apple Mail, and more.

9 output formatsBatch file supportThunderbird & Gmail compatibleInstant conversion

Drop MBOX files here

or click to browse · select multiple files

Overview

What Is MBOX to JSON Conversion?

MBOX is a standard email archive format used by Thunderbird, Apple Mail, and Google Takeout. JSON is a lightweight, structured data format widely used in software development, APIs, and data analysis. Converting MBOX to JSON transforms your email archive into structured data that can be programmatically processed.

Each email becomes a JSON object with fields like from, to, subject, date, body, and status. The entire mailbox is output as a JSON array, ready for import into databases, processing with scripts, or feeding into APIs.

This free converter processes entirely on your device — no upload, no server processing. Drop your MBOX file, preview extracted emails, apply filters if needed, and download a clean JSON file. The output is pretty-printed for readability and works with MongoDB, Elasticsearch, PostgreSQL, Python, Node.js, and any JSON-capable tool.

Developers use MBOX to JSON conversion for email analytics, migration pipelines, search index building, compliance archiving, and automated processing workflows. The tool supports batch conversion of multiple files, date-range filtering, and deleted mail recovery.

Features

Features

MBOX to JSON conversion capabilities

Structured JSON output

Each email becomes a JSON object with from, to, subject, date, body, and status fields — ready for code consumption.

API & developer ready

JSON output is ideal for loading into databases, feeding APIs, building dashboards, or processing with scripts.

Batch conversion

Drop multiple MBOX, MBX, or MBS files. All emails are extracted, parsed, and exported as a single JSON array.

No upload — 100% private

Everything processes on your device. Your MBOX files are parsed privately and never leave your device.

Filters & search

Filter by date range, mail status (read/unread/deleted), or keyword search before exporting to JSON.

Pretty-printed JSON

Output is formatted with indentation for easy reading. Import directly into MongoDB, Elasticsearch, or any JSON-capable tool.

How it works

How to Convert MBOX to JSON

Four simple steps

01
01

Open the converter

Navigate to the MBOX to JSON converter page.

02
02

Upload MBOX files

Drag & drop your .mbox, .mbx, or .mbs files into the upload area.

03
03

Select JSON format

JSON is pre-selected. Preview extracted emails, apply filters if needed.

04
04

Convert & download

Click Convert & Download to get a structured JSON file with all email data.

FAQ

Frequently Asked Questions

MBOX to JSON conversion

Q1. What does the JSON output look like?
Each email is a JSON object with fields: from, to, subject, date, status, bodyPreview, body, and sourceFile. All emails are in a JSON array, pretty-printed with 2-space indentation.
Q2. Can I import the JSON into a database?
Yes. The JSON array can be imported into MongoDB, PostgreSQL (JSONB), Elasticsearch, or any database that supports JSON. It's also easy to process with Python, Node.js, or other languages.
Q3. Does it preserve the full email body?
Yes. Both plain text and HTML bodies are included. MIME decoding (base64, quoted-printable, charset) is handled automatically.
Q4. Is there a size limit?
No artificial limit. Processing happens on your device, so it depends on available memory. Large MBOX files with thousands of emails work well.
Q5. Can I filter which emails to export?
Yes. Use the date-range filter, mail status filter (read/unread/deleted), or keyword search to export only the emails you need.
Q6. Do I need to install anything?
No. The converter processes entirely on your device. No software, plugins, or additional processing required.
Related

Related Tools

More MBOX conversion options

MBOX ConverterMBOX to EMLMBOX to PSTMBOX to CSVMBOX to HTMLMBOX to PDFMBOX to TXTPST ConverterMBOX ViewerEML Viewer