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Translate Books

Translate books in a reading-first workflow that lets you inspect the result on desktop and keep the translated book for later.

Drop a PDF or EPUB here

Upload one document, then choose the result you want to create.

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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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  • Chapters & headings
  • Text & equations
  • Adjustable text
  • Fonts & styles

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 books and review the output

The desktop app gives you a practical place to translate book-length content, inspect the output on a larger screen, and keep the translated book locally once it is ready. That is useful when the search is broad but the goal is still a book you can keep reading.

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See client apps

Translate books into versions you can keep reading

Even as a broad phrase, what matters most is still ending up with translated books that remain coherent enough to review, save, and read over time.

  1. Best for broad book-translation tasks

    Useful when the search starts from the idea of translating books in general rather than from a specific file format.

  2. The result should support real book reading

    A good outcome is not just translated passages but a book that remains coherent enough to keep following.

  3. Review helps decide whether the book is worth keeping

    Users often still want to inspect the translated book before making it part of their reading flow.

  4. Useful when the goal is books, not isolated text snippets

    The important result is a translated reading copy you can keep using, even when the search starts from a broader books-first phrase.