VoiceBrief helps researchers preview compatible academic PDFs as audio, then return to the source for figures, equations, tables, citations, and close reading. Free includes 1 saved PDF preview and 3 monthly preview minutes. Pro is $19.99/month for full paper audio, MP3 downloads, summaries, quizzes, chat, and slides.
Scanned or image-heavy papers may need OCR review, and extraction quality can vary. VoiceBrief is a review workflow, not a substitute for reading the underlying research or checking cited sources. Start with the PDF-to-audio and MP3 converter or compare expected time in the reading time calculator.