Free online ODT to OGG converter

When a phone, media player, or accessibility workflow accepts audio but not documents, an ODT file may need to become spoken audio in OGG format. This is a text-to-speech conversion, not a direct audio codec change.

What the ODT format is

ODT is the OpenDocument Text format, used for editable word-processing documents. LibreOffice Writer and Apache OpenOffice create ODT files; Microsoft Word and other office programs can also open or save them. ODT files commonly contain paragraphs, headings, tables, and images.

What the OGG format is

OGG is a multimedia container commonly used for Vorbis or Opus audio. OGG Vorbis provides compressed audio supported by many desktop players and media tools. To make an OGG from an ODT, software must first read the document text and synthesize speech; the result is audio rather than an editable copy of the document.

How to actually convert ODT to OGG

Online on 101convert.com

1. Upload the ODT file on the 101convert.com converter page. You can add several files for batch conversion; the page shows the per-file size limit.
2. Before converting, select the voice language and reading speed.
3. Start the conversion and download the resulting OGG file.

Offline with desktop software

LibreOffice, eSpeak NG, and FFmpeg are free tools available for Windows, macOS, and Linux. This workflow exports the document’s text, synthesizes a WAV file, then encodes it as OGG Vorbis. The commands below use typical Linux or macOS command-line installations:

1. Export the ODT document to plain text: libreoffice --headless --convert-to txt:Text --outdir ./work document.odt. This creates ./work/document.txt.
2. Synthesize speech from the exported text: espeak-ng -f ./work/document.txt -w ./work/speech.wav.
3. Encode the WAV audio as OGG Vorbis: ffmpeg -i ./work/speech.wav -c:a libvorbis -q:a 5 ./work/speech.ogg.

Change document.odt to the input filename. eSpeak NG supports voice and speed options, such as -v en-us for a voice and -s 150 for speech speed; available voices depend on the installation. On Windows, the same programs are available, but command paths may need adjustment.

Quality and limitations

The OGG contains synthesized narration, not the original document layout. Plain-text export can omit visual formatting and may represent tables differently; images are not narrated. Speech clarity depends on the selected voice, language, and speed. The Vorbis quality setting in the command controls audio encoding, not the pronunciation or naturalness of the synthesized voice.