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 V3 Large 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 are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Free | 100 MB | 50 files | 2 at once |
| Pro | 500 MB | 200 files | 4 at once |
| Business | 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: 1 credit per minute
How it works:
- Files up to 1 minutes: 1 credit (minimum)
- 2 minutes: 2 credits
- 3 minutes: 3 credits
- 4 minutes: 4 credits
Example: A 10-minute file = 10 credits. A 180-minute (3h) audiobook = 180 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 |
|---|---|---|
| Free | 50 credits/day | — |
| Pro | — | 10,000 credits/month |
| Business | — | 25,000 credits/month |
Daily credits (Free tier, including guests) reset every day at midnight UTC. Monthly credits (Pro & Business) reset on your billing cycle date.
Note: With 1 credit per minute, audio files under 1 MB cost 1 credit each. Pro users can convert 10,000 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?
Choose Your Plan
Limits shown for Audio to EPUB conversion. One subscription unlocks the entire Tools.FAST Network. Plans cover Convert.FAST, Compress.FAST, PDF.FAST (soon), and all future tools.
Free
For occasional personal use
- 100 MB per file
- 50 files per batch
- 2 parallel standard conversions
- 2 parallel AI conversions
- 50 credits/day
- Standard priority
- Email support
No sign-up required.
Create an account for your own credit pool.
Pro
For independent work
- 500 MB per file
- 200 files per batch
- 4 parallel standard conversions
- 4 parallel AI conversions
- 10,000 credits/month across Tools.FAST
- High priority
- Email & chat support
- One subscription for the entire Tools.FAST network
Business
For production scale
- 1 GB per file
- 1000 files per batch
- 6 parallel standard conversions
- 6 parallel AI conversions
- 25,000 credits/month across Tools.FAST
- Add seats to invite team members
- Highest priority
- Priority email & chat support
- One subscription for the entire Tools.FAST network
How Credits Work
- Usually 1 credit per conversion. Exact cost shown before you start.
- Credits refresh monthly on your billing cycle.
- Unused credits roll over, capped at your plan's monthly amount.
- One subscription, all sites. Works across Convert.FAST, Compress.FAST, and future tools.
Other Transcription Formats
Need a different format for your transcript?