Free online MD to AAC converter

A Markdown file contains written content, while an AAC file contains audio, so this conversion is useful when you need a spoken version for listening on a phone or audio player. The conversion reads the Markdown aloud using text-to-speech; it does not convert an existing audio track.

What the MD format is

An .md file is usually a Markdown document: plain text with lightweight formatting markers for headings, lists, links, and other structure. Editors such as Visual Studio Code, Obsidian, and many code editors create or open Markdown files. For speech conversion, the written content is synthesized into audio; Markdown formatting itself is not an audio signal.

What the AAC format is

AAC (Advanced Audio Coding) is a lossy audio format used for speech and music playback on phones, computers, and media players. It generally provides good sound quality at modest bitrates. AAC audio is commonly stored in an .m4a container, though raw AAC streams may use the .aac extension.

How to convert MD to AAC

Online on 101convert.com

1. Upload the Markdown file on the converter page. Several files can be added for batch conversion; check the page for the per-file size limit.
2. Set the voice language and reading speed before converting.
3. Start the conversion, then download the resulting AAC audio file.

Offline with desktop software

With the free, cross-platform tools Pandoc, eSpeak NG, and FFmpeg, first extract readable text from the Markdown file, synthesize speech, then encode the audio as AAC. Install all three programs for your operating system, then run:

1. pandoc input.md -t plain -o speech.txt
2. espeak-ng -f speech.txt -w speech.wav
3. ffmpeg -i speech.wav -c:a aac -b:a 128k output.m4a

Pandoc, eSpeak NG, and FFmpeg are available for major desktop operating systems. The final command creates AAC audio in an M4A container; change input.md and output filenames as needed.

Quality and limitations

Text-to-speech quality depends on the selected voice and language, and punctuation or abbreviations can affect how sentences are read. Markdown headings and lists may be spoken as plain content or handled as structure depending on the converter; images do not become spoken descriptions automatically. AAC encoding is lossy, so the output is not a verbatim audio copy of the source—the source is text, not recorded sound.