Guide · October 2026
An MP3 file, a document read to you, or a book you can listen to like an audiobook — they need different tools. Here is which one fits which job.
Written by the Lyraboo team, so we are not neutral — and Lyraboo only covers one of the jobs below. Facts about the other tools come from their own websites, checked in October 2026.
| You want | Use | Trade-off |
|---|---|---|
| An audio file (MP3) | Online converters; NaturalReader’s app; @Voice Aloud Reader | One voice, no player — you manage the files |
| A document read to you | Speechify, ElevenReader, NaturalReader, Paper2Audio | Natural voices; one voice for everything |
| A paper with footnotes and maths | Paper2Audio | Skips references, explains tables — not for fiction |
| Free, nothing to install | Microsoft Edge Read Aloud; ebook readers with phone TTS | One voice; Edge needs a computer |
| A book, as an audiobook | Lyraboo | Every character in their own voice; Android, online |
Online PDF-to-MP3 converters take the file and give back audio in one synthetic voice. They are the right tool when the audio has to live somewhere else — a car stereo, a course platform, an old MP3 player. On a phone, NaturalReader’s app exports MP3 and @Voice Aloud Reader records MP3, OGG or WAV. What you do not get is a player that knows chapters or remembers where you stopped.
All of them read in one voice, which suits reports, articles and study notes.
On a computer, open the PDF in Microsoft Edge and press Read aloud: natural online voices, adjustable speed, no account. On Android, ebook readers such as ReadEra, Moon+ Reader and Librera open PDFs and read them with the phone’s text-to-speech engine — free and offline, in the same flat voice that reads your notifications. See the best PDF readers that read aloud on Android.
A novel is not a report. Read in one voice, a story turns into a puzzle — the listener has to work out who is speaking from the words alone, and long dialogue falls apart. Lyraboo turns a text-based PDF into an audiobook with a full cast: a narrator for the description and every character in their own AI voice, kept for the whole book, so you always know who is talking. It plays like a music app — chapters, 0.25×–3× speed, lock-screen controls, resume where you stopped — with the text scrolling under the player like song lyrics, each line labelled with its speaker. Upload the PDF and press play; the first chapter is ready in about one to two minutes.
Its limits: Android only, needs a connection, no MP3 export, no OCR for scans, and one free hour a month before a subscription. The full comparison of book apps: the best apps to turn a PDF into an audiobook.
The whole process step by step: how to turn a PDF into an audiobook.
Speechify, ElevenReader, ElevenLabs, NaturalReader, Paper2Audio, @Voice Aloud Reader, Microsoft Edge, ReadEra, Moon+ Reader and Librera are trademarks of their respective owners. Lyraboo is an independent app and is not affiliated with, sponsored by, or endorsed by any of them. This guide reflects publicly available product information.
The things people notice in the first chapter — and the reasons they stay.
Lyraboo’s AI finds every character in the book and casts a distinct voice for each — automatically, for every book. You always know who is speaking, and dialogue sounds like a real conversation instead of one narrator doing all the parts. Most reading and text-to-speech apps use one voice for everything.
Under the player, the book scrolls with the voice the way song lyrics do in Spotify: words light up as they are spoken, each line shows who says it, and tapping any word jumps there.
Chapters, speed from 0.25× to 3×, background playback with lock-screen controls, and it picks up exactly where you stopped.
Pick an EPUB, PDF or TXT and there is nothing to set up: the first chapter is ready in about one to two minutes, and the rest generate while you listen.
Novels, fanfiction and web-serial exports, indie ebooks, study PDFs — plus over 1,000 English classics already in the app.
One free hour of listening every month, no card needed. Hours are spent once per chapter — replaying is always free.
There is no single best one, because “PDF to speech” means three different jobs. For an MP3 file, an online converter or NaturalReader’s app. For documents read aloud with natural voices, Speechify, ElevenReader or NaturalReader, and Paper2Audio for academic papers. For a book — a novel above all — Lyraboo, which turns the PDF into an audiobook with a different voice for every character.
Yes. Microsoft Edge reads PDFs aloud for free on a computer, ebook readers like ReadEra, Moon+ Reader and Librera read them with your phone’s voice, and @Voice Aloud Reader is free with ads. Paper2Audio’s free plan gives 56 hours a week and ElevenReader’s 10 hours a month. Lyraboo’s free plan is one hour of full-cast listening a month.
Use a tool that outputs a file: an online PDF-to-MP3 converter, NaturalReader’s mobile app (MP3 export) or @Voice Aloud Reader (records MP3, OGG or WAV). Reader and audiobook apps such as Speechify, ElevenReader and Lyraboo play the audio inside the app instead.
A PDF stores the running header, footer and page number on every page as ordinary text. Simple converters read all of it. Paper2Audio removes headings, footnotes and references, and ElevenReader’s paid plan skips headers and footers. Lyraboo splits a book into chapters before narrating it.
Yes — with Speechify, ElevenReader, NaturalReader, Paper2Audio, @Voice Aloud Reader or a free ebook reader using the phone’s voice. For books, Lyraboo turns the PDF into a full-cast audiobook. More in the guide to the best PDF reader that reads aloud on Android.
Upload a book you own and let the app turn it into a multi-voice audiobook automatically.