How private PDF to speech works
The file is opened by PDF.js inside your browser. Text objects are collected page by page and placed in an editable box. Voice playback then uses the speech engine provided by your browser or operating system. VoiceAI Free does not receive the PDF or its extracted text, although the model and library files needed by the page are delivered over the internet.
Which PDF files work best
Digitally created reports, articles, manuals, and exported word-processing documents normally contain selectable text. Scanned pages are images and require optical character recognition, which this version does not perform. Complex multi-column layouts, mathematical notation, headers, and tables can also produce an imperfect reading order. Review the extracted text before listening.
Use the reader for comprehension and proofreading
Listening can reveal repeated words, missing transitions, awkward sentences, and headings that interrupt the flow. For study, slow the voice and follow the text visually. For long documents, copy one section at a time into the main Voice Studio so your browser does not have to queue an entire report.
Questions people ask
Is the PDF uploaded?
No. The page passes the selected file directly to a browser-side PDF parser.
Why is my scanned PDF empty?
A scan contains pictures of text rather than text objects. It needs OCR before a speech reader can use it.
Can the reader keep my place?
The first version does not save a page position. For sensitive documents, that also means fewer traces are retained.