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EPUB Book Translator

Translate EPUB books in a workflow built for chapter continuity, desktop review, and keeping the translated book readable over time.

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Another language. Still your book.

From chapter headings to images, footnotes and text styles, the translation follows the structure and layout of the original. Read in a new language with a familiar reading experience.

Original · English

Calculus Made Easy

Chapter I

A little bit of. The sum of.

These dreadful symbols are:

(1) d which merely means “a little bit of.” Thus dx means a little bit of x; or du means a little bit of u. But you will find that these little bits (or elements) may be considered to be indefinitely small.

dx,du

(2) ∫ which is merely a long S, and may be called (if you like) “the sum of.” Thus ∫dx means the sum of all the little bits of x; or ∫dt means the sum of all the little bits of t.

∫dx,∫dt

The word “integral” simply means “the whole.” If you think of the duration of time for one hour, you may (if you like) think of it as cut up into 3600 little bits called seconds. The whole of the 3600 little bits added up together make one hour.

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Translation · European Spanish

El cálculo al alcance de todos

Capítulo I

Un poquito. La suma.

Estos temibles símbolos son:

(1) d, que solo significa «un poquito de». Así, dx es un poquito de x; du, un poquito de u. Pero verá que estos pequeños trozos (o elementos) pueden considerarse indefinidamente pequeños.

dx,du

(2) ∫, que no es más que una S alargada y puede llamarse, si lo desea, «la suma de». Así, ∫dx es la suma de todos los pequeños trozos de x; ∫dt, la de todos los de t.

∫dx,∫dt

La palabra «integral» significa simplemente «el todo». Puede imaginar una hora dividida en 3600 pequeños trozos llamados segundos. Todos esos 3600 trozos sumados forman una hora.

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A new language, the same familiar book. Keep the chapters, images and original layout, and carry on reading in your favorite reader.

Desktop + iOS client

Download the desktop app to translate EPUB books and inspect the reading flow

The desktop app gives you a practical place to translate EPUB books, check chapter flow on a larger screen, and keep the translated book locally once it is ready. That matters when the book itself, not just the text, is the thing you want to preserve.

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Translate an EPUB book without losing the feeling of reading a book

If the file is already an EPUB book, what matters most is a translated version that still preserves chapter flow and reading continuity.

  1. Best for people translating full EPUB books

    Useful when you care about chapter-level reading flow and want the translated file to remain book-like.

  2. The output should still feel like a book

    A strong result is a translated EPUB book that remains readable over time rather than a temporary text export.

  3. Desktop review helps judge whether the book still works

    Users often want to check whether the translated chapters feel coherent enough before keeping the book.

  4. Useful when the goal is to keep the translated file book-like

    The important result is not just translated text, but a full EPUB book you can review, save, and keep reading over time.