Convert PDF, EPUB, DOCX and TXT files to MP3 or M4B audio online
Audio gear reviews built from independent sources, with consensus on what reviewers agree about.
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free: Standard voices with 50,000 characters per day limit for signed-in users. Premium: Pay-as-you-go credits starting at $5.99 for 5,000 credits, $15 for 15,000 credits, $30 for 30,000 credits, or $50 for 50,000 credits. Credits are valid for 1 year.
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Key features
Convert PDF, EPUB, DOCX and TXT files to MP3 or M4B audio
300+ Standard voices in 30+ languages
800+ Premium AI voices via ElevenLabs and Gemini
Select pages or chapters before conversion
Review and edit extracted text before converting
Download as ZIP of MP3 files or single M4B audiobook
Background conversion for Premium users
Re-download audio for 7 days after generation
Voice cloning with ElevenLabs
Privacy-first: documents parsed in browser, never uploaded to servers
Aggregates independent reviews from multiple sources
Shows where reviewers agree and disagree on products
Names reviewer camps instead of averaging opinions
Includes 566 products across headphones, IEMs, speakers, amps and DACs
Audio dictionary with 44 listening guides and 265 definitions
Side-by-side product comparison tool
Longer essays (Overtones) drawn from reviews and dictionary
Machine synthesis of human reviews with published weights
All claims link back to original sources
What makes it different
Built specifically for long documents with chapter selection and text preview
Free tier with 50,000 characters daily allowance, no credit card required
Access to premium AI voices from ElevenLabs and Google Gemini with pay-as-you-go pricing
Document privacy: file parsing happens in browser, sensitive content never uploaded
Shows genuine disagreement between reviewers rather than averaging opinions into bland consensus
Built from 19,395 independent sources with transparent weighting of affiliated or copied reviews
Explains why reviewers disagree, such as fit and ear shape differences
Updated live as new reviews are added to the catalogue
No manufacturer payment or review approval process