Why Choose Echo3s
Drag-and-Drop Upload
Upload any PDF file up to 50MB. Our AI extracts text, preserves formatting, and handles complex layouts including multi-column and RTL text.
Smart Character Detection
AI automatically identifies characters, narrators, and dialogue. Each character gets their own unique voice for an immersive listening experience.
Studio-Quality Output
Get professional-grade audio with natural intonation, proper pacing, and emotional delivery. Sounds like a professional narrator, not a robot.
Arabic, English & Dutch
Full support for Arabic (with RTL), English, and Dutch PDFs. Native-quality voices for each language with proper pronunciation.
Minutes, Not Months
Traditional audiobook production takes weeks and costs thousands. Echo3s converts a 300-page book in under 30 minutes for a fraction of the cost.
50+ Natural Voices
Choose from a diverse library of AI voices — different ages, accents, and styles. Assign the perfect voice to each character in your book.
How It Works
Upload Your PDF
Drag and drop your PDF file. Echo3s extracts text and automatically detects all characters and dialogue passages.
Review & Cast Voices
Review the detected characters. Assign a unique AI voice to each character from our library of 50+ natural-sounding voices.
Generate & Download
Click generate. Your audiobook is ready in minutes. Download as MP3 or stream directly from your library.
Built for Readers, Authors, and Publishers
Frequently Asked Questions
What types of PDFs can I convert to audiobooks?
Echo3s handles any text-based PDF including novels, textbooks, research papers, reports, and manuscripts. It supports complex layouts, multi-column formats, and RTL text (Arabic). Scanned/image-only PDFs are not yet supported.
How long does it take to convert a PDF to an audiobook?
A 100-page PDF typically converts in under 10 minutes. A full 300-page novel takes approximately 20-30 minutes. Processing time depends on the complexity of the text and number of characters detected.
How does character voice detection work?
Our AI analyzes dialogue tags, quotation marks, and narrative patterns to identify unique characters. Each character is assigned a separate voice, creating a multi-narrator audiobook experience similar to a full-cast production.
What languages are supported?
Echo3s currently supports Arabic, English, and Dutch. Each language has native-quality AI voices with proper pronunciation, intonation, and pacing. Arabic text is handled with full RTL support.
How much does it cost to convert a PDF to an audiobook?
You can start free with 5,000 credits (approximately 50 pages). Paid plans start at $9.99/month for 50,000 credits. A typical 300-page book uses about 30,000 credits — roughly $6 per book on the Creator plan.
Can I preview before generating the full audiobook?
Yes. You can review all detected characters and their assigned voices before generating. You can also regenerate individual segments if you want to adjust a specific voice or passage.