Bulk Transcribe Audio to EPUB Online Free
Convert podcasts, lectures & audiobooks to EPUB for any e-reader.
Drop up to 50 files at once — no install, no sign-up required.
Drop Audio or Video Files Here
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How it works
- 1 · Drop your files
Drag & drop audio or video files. Supports MP3, WAV, M4A, MP4, and more. No account required.
- 2 · We create your e-book
Transcribed by OpenAI Whisper (choose Fast or Quality model) with AI-formatted title. Encrypted in transit & at rest.
- 3 · Download & auto-delete
Get your EPUB e-book in seconds. Files delete automatically after 1 hour.
Frequently Asked Questions
Will my EPUB work on Kindle?
Yes — Kindle supports EPUB via Send to Kindle, which auto-converts to Kindle format.
Just email your EPUB to your @kindle.com address or use the Send to Kindle app.
Want a native Kindle file? Use our EPUB to AZW3 converter.
Kobo, Apple Books, and Google Play Books read EPUB natively — no conversion needed.
Can I read the EPUB offline?
Yes — that's the point.
Download to your e-reader and read anywhere without internet. Perfect for flights, commutes, or places without connectivity.
The transcript becomes a proper e-book on your device.
What is EPUB format?
EPUB is the open standard for e-books.
Unlike PDF, text reflows to fit any screen size — phones, tablets, e-readers.
It supports:
- Bookmarks and notes
- Adjustable fonts
- Dark mode
Your podcast or lecture becomes a real book.
Which e-readers support EPUB?
Most non-Amazon e-readers support EPUB natively:
- Kobo
- Nook
- Google Play Books
- Apple Books
- Sony Reader
- PocketBook
For Kindle, see the conversion options above.
When should I use EPUB vs PDF vs Markdown?
- EPUB — E-readers for offline reading (Kobo, Apple Books)
- PDF — Sharing a fixed document or printing
- Markdown — Notes apps like Obsidian or Notion
Want notes instead? Try Audio to Markdown →
What is the difference between Fast and Quality models?
Two OpenAI Whisper models — choose speed or accuracy:
| Model | Engine | Speed | Cost |
|---|---|---|---|
| Fast | Whisper V3 Large Turbo (809M) | ~216x realtime | 2 credits/min |
| Quality | Whisper V3 Large (1.55B) | ~189x realtime | 5 credits/min |
Fast is the default — great for clear audio, podcasts, and lectures.
Quality uses the full 1.55B-parameter model. Independent benchmarks show ~10% WER for Quality vs ~12% for Fast (Artificial Analysis). Choose Quality for accented speech, noisy recordings, or technical content.
Both models support 99+ languages. Switch in the options panel above.
Sources: Groq docs, Artificial Analysis benchmark, Hugging Face model cards.
Will Meeting Intelligence show in my e-book?
Yes — Meeting Intelligence appears in EPUB transcripts with clear speaker attribution, making podcasts and interviews read like proper dialogues.
When enabled, each speaker's text is prefixed with their name or label:
John: Welcome to today's episode. We're discussing the future of remote work.
Sarah: Thanks, John. I think the biggest shift we've seen is...
This format is perfect for:
- Podcast transcripts as readable books
- Interview collections
- Panel discussion archives
Our AI post-processing attempts to identify speakers by name when they're introduced or addressed in the audio. Important: Name detection isn't perfect — it works best when speakers introduce themselves ("Hi, I'm Sarah...") or are called by name. If names aren't detected, you'll see generic labels like "Speaker 1" and "Speaker 2."
Meeting Intelligence costs extra credits and makes your e-book much more readable for multi-speaker content.
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Guest/Free | 100 MB | 50 files | 3 at once |
| Pro | 1024 MB | 1000 files | 6 at once |
Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all images converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 2 credits per minute
How it works:
- Files up to 1 minutes: 2 credits
- 2 minutes: 4 credits
- 3 minutes: 6 credits
- 4 minutes: 8 credits
Example: A 10-minute file = 20 credits. A 180-minute (3h) audiobook = 360 credits.
Why per-minute? Audio conversion time scales with content duration, not file size. Longer audio requires proportionally more processing.
What are my daily and monthly credit limits?
Credit allocations vary by account tier:
| Tier | Daily Limit | Monthly Limit |
|---|---|---|
| Guest | 100 credits/day | — |
| Free | 100 credits/day | — |
| Pro | — | 12,000 credits/month |
Daily credits (Guest & Free tiers) reset every day at midnight UTC. Monthly credits (Pro) reset on your billing cycle date.
Note: With 2 credit per minute, audio files under 1 MB cost 2 credit each. Pro users can convert 6,000 audio files per month.
Answers at a Glance
Quick answers to common questions.
- Are my files secure?
- How long do you keep my files?
- What metadata do you keep?
- What happens after I drop a file?
- Why are conversions so fast?
- How do you measure performance?
- What are the exact limits for each plan?
- Can I process files in bulk?
- Why did my file fail to convert?
- Do you use my files to train AI?
Other Transcription Formats
Need a different format for your transcript?
What's New in Audio to EPUB
Latest improvements to this converter
Added Whisper V3 Large as a Quality mode for higher-accuracy transcription.
Launched Audio to EPUB transcription for e-readers.
Need to get more done? Pro starts from $5.
No subscription required.