Cloud apps
EbookMaker Cloud guide
EbookMaker Cloud is the cloud version of the 6lab Books engine: it aligns every word of a picture book to its narration, then builds read-along ebooks in three formats.
Step-by-step
- Open EbookMaker Cloud and sign in — building ebooks requires a free 6lab account (the console shows a sign-in prompt if you aren't).
- Upload two files: the picture-book PDF and its narration audio.
- Pick a transcription model size if asked (larger = more accurate,
slower;
basesuits most picture books). - Start the job and watch progress — alignment is the long step.
- Preview the read-along right in the console: words highlight as the audio plays; click any word to seek.
- Download when done.
Output formats
| Format | Notes |
|---|---|
| EPUB 3 + Media Overlays | Best in Apple Books and read-along-capable readers |
| Interactive PDF | Plays audio inline; good for sharing one file |
| Standalone HTML | Embed anywhere; no reader app needed |
All formats include word-level highlighting, click-to-seek, and audio-synchronized page turns.
Tips
- One narration track for the whole book is the simplest and most reliable input.
- If a word highlights early/late, check the PDF text layer — image-only pages need OCR-quality text to align well.
- Re-run any job after fixing the PDF; previous outputs are replaced.
- Long narrations may exceed serverless upload limits — those upload straight from your browser to the engine automatically.
Limits
Jobs are queued and polled through the console; very long books simply take longer, they don't fail.