TXT to MOBI Converter
Generate the exact Calibre command to convert a .txt file to MOBI. Fill in your filename, title, and author — copy the command and run it.
Calibre Command Generator
The .txt file in your current directory
Leave blank to auto-derive from input filename
How to run the conversion
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1
Install Calibre
Download from calibre-ebook.com (free, Windows / macOS / Linux). The installer adds ebook-convert to your system.
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2
Open a terminal in the same folder as your .txt file
Windows: Shift-right-click the folder → "Open PowerShell here". macOS: drag the folder onto Terminal.
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3
Paste and run the generated command
Calibre reads the .txt file, embeds your metadata, and writes the .mobi output in the same directory.
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4
Transfer to Kindle via USB or Send to Kindle
Connect your Kindle via USB and copy the .mobi file to the documents/ folder, or email it to your Kindle address.
macOS PATH note
On macOS, ebook-convert may not be in your PATH after a GUI install. Run the full path:
/Applications/calibre.app/Contents/MacOS/ebook-convert input.txt output.mobi
Or add /Applications/calibre.app/Contents/MacOS to your ~/.zshrc PATH.
Alternatives if you cannot install Calibre
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Kindle Direct Publishing (KDP)
Upload a .txt file to kdp.amazon.com and KDP converts it automatically. Best for books you intend to publish.
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Zamzar / CloudConvert
Online converters that accept .txt and output .mobi. Your file is uploaded to their servers — avoid for sensitive content.
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Convert to EPUB first, then to MOBI
Use the TXT to EPUB tool on this site to get an EPUB in your browser, then run ebook-convert book.epub book.mobi with Calibre.
Summary
Generate the exact Calibre command to convert a .txt file to MOBI. Fill in your filename, title, and author — copy the command and run it.
How it works
- Enter your .txt filename (e.g. my-book.txt) in the filename field.
- Fill in the book title and author — these are embedded as MOBI metadata.
- The Calibre command updates live as you type.
- Click "Copy Command" and paste it into your terminal.
- Run the command — Calibre writes the .mobi file in the same directory.
Use cases
- Converting a novel draft saved as plain text into a MOBI file for Kindle preview.
- Packaging public-domain Project Gutenberg .txt files for a Kindle device.
- Preparing a long-form article or research document for offline Kindle reading.
- Batch-converting a collection of plain-text stories into MOBI for sideloading.
- Generating the correct Calibre arguments without memorizing the CLI syntax.