Step 1
Prepare clean, sentence-based source text
VoiceLeaf accepts text pasted directly into the editor or uploaded as a plain TXT file. Use material you wrote, material in the public domain, or material you have permission to translate and convert. A clean source produces a better bilingual EPUB than text copied with page numbers, navigation labels, or broken line endings.
Put complete sentences on separate lines when possible. Short paragraphs also work, but checking the sentence preview before payment is important. The preview shows how the source will be divided, which is also how translation and audio are paired inside the finished eBook.
Step 2
Select the source and translation languages explicitly
Choose the language of the original text first. If you want a bilingual book, turn on translation and select the target language. The EPUB places the translated sentence next to the original so you can read, compare, and listen without switching between separate apps.
VoiceLeaf supports common study combinations including English, Korean, Japanese, Spanish, French, German, Portuguese, Italian, Indonesian, Arabic, Hindi, and additional speech languages listed in the maker. Always review names, specialist terminology, and ambiguous sentences. AI translation is useful for study material, but it is not a substitute for a professional translator when legal, medical, or publication accuracy is required.
Jack thought that Miles was brave and adventurous.
Jack pensó que Miles era valiente y aventurero.
Step 3
Add only the audio tracks you will use
Normal-speed audio is useful for listening practice. Slow audio leaves more space to notice sounds and repeat a sentence. You can include either track or both, and you can choose whether speech follows the original or translated text. An optional combined track adds continuous playback near the top of the EPUB, but it also increases generation time and file size.
VoiceLeaf is designed and tested around embedded audio in Apple Books on iPhone and iPad. Other EPUB readers may display the text while ignoring or handling audio differently. Treat Apple Books as the supported playback environment rather than assuming every eBook app behaves the same way.
Step 4
Review the estimate before checkout
Run the analysis after entering your text. VoiceLeaf shows the number of study sentences, estimated audio duration, expected EPUB size, possible volume splitting, and the price for the selected options. Larger source files and two audio speeds require more processing than a text-only EPUB.
Confirm the source language, translation target, audio source, reader support, and usage rights before opening PayPal. The checkout amount is displayed in USD. Availability can vary by the buyer's and seller's PayPal regions, so a checkout that cannot be approved will not start generation.
Step 5
Download the result and open it in Apple Books
After payment and generation finish, use the download button immediately. The secure link remains valid for 24 hours, but the EPUB itself is yours to keep after download. If a long source is split into multiple volumes, VoiceLeaf provides them together as a ZIP file.
On iPhone or iPad, open the downloaded EPUB from the browser or Files share sheet and choose Books. Check several sentence pairs and both audio speeds before relying on the book for a longer study session. On a Mac, Apple also documents importing EPUB files through Books using File > Import.
Common questions
Before you make an audio EPUB
Can I make an EPUB from a TXT file?
Yes. Paste text into VoiceLeaf or upload a plain TXT file, then review the detected sentences.
Can the EPUB contain both translation and audio?
Yes. Translation, normal audio, slow audio, and combined playback can be selected independently.
Does it work in Kindle or Android readers?
Text may open in other readers, but VoiceLeaf only tests and supports embedded-audio playback in Apple Books on iPhone and iPad.
Do I need a VoiceLeaf account?
No account is required. Download the result before the 24-hour secure link expires.