Help and guides
Quick guides to read better on Kindle, on your phone and on your computer.
How to send books to Kindle by emailFind your Kindle email address, authorize the sender and send EPUB, PDF or DOCX straight to the device.
How to convert PDF to EPUB (and when it's worth it)Understand when converting PDF to EPUB works well, its limits, and what to do with scanned PDFs.
EPUB, PDF or DOCX: which format to chooseDifferences between EPUB, PDF and DOCX, and which to use for reading on Kindle, printing or editing.
How to translate a whole EPUB bookTranslate EPUB books chapter by chapter, understand the limits of automatic translation and copyright precautions.
How to turn a book into an audiobookConvert an EPUB book into audio with Portuguese voices and listen on any player.
How to create an app password in GmailStep by step to create the Google app password used to send books to Kindle securely.
Where to download public domain books in PortugueseWhen a work enters the public domain in Brazil, and the best sites to legally download classics for free.
Frequently asked questions
Is Libtro free?
Yes. All features are free for anyone with an account. Without signing up, guest mode lets you try 2 conversions and 2 translations.
Do I need to install anything?
No. Everything works in your browser, on your computer or on your phone.
Are my books public?
No. Only you can see your library. Results stay available for 7 days, and you can delete them sooner.
Which formats can I send?
EPUB, PDF and DOCX, up to 50 MB per file (10 MB in guest mode).
Can I use any book?
Only use files you have the right to use, such as your own documents, DRM-free books you bought, or works in the public domain.
How do I send to Kindle?
Set it up once in Settings → Kindle and send with one tap. See the step-by-step guide.