To turn a PDF into speech, open PDF to Audio, upload the file, pick a voice, and download an MP3 or WAV. File Transmute extracts the text and synthesizes it with a neural voice that runs on your device — so your document is never uploaded.
Why text-to-speech is useful
Listening lets you get through reports, articles, and study material while commuting, walking, or resting your eyes — and it's a genuine accessibility aid. The catch with most TTS services is that they upload your text and meter every character. An on-device voice removes both problems.
On-device, natural voices
File Transmute runs an 82-million-parameter neural voice model (Kokoro) directly in your browser via WebAssembly. The model downloads once on first use, then synthesizes locally — your text never leaves the device, and there's no per-character cost or limit.
How to convert
- From a document: PDF to Audio or Word to Audio — the text is extracted, then spoken.
- From typed or pasted text: Text to Speech.
- Pick a voice and export MP3 or WAV; the audio is generated on your device and downloads instantly.
Tip: get clean text first
For a scanned PDF (an image of text), run Image to Text (OCR) or PDF to Text first so the words are recognized, then feed that into text-to-speech for the best result.