Top 7 AI PDF Translators for Effortless Language Translation

Summary :

The following 7 PDF translators utilize AI to help translate PDF into multiple languages. We have compared their features and the technologies behind to make it easier to pick the best AI PDF translator. Start reading now!

Table of Contents

AI PDF Translator

AI PDF Translator

Translating a PDF manually is a time-consuming task. On average, a translator can only translate 3000 words in 8 hours. It might take days to finish one document.

AI PDF translators can help translate a PDF between any language accurately and effectively. To save you from doing endless searching and making comparisons, we have listed the best 7 AI PDF translators. Let’s check them out!

Comparison Table of the AI PDF Translators

AI PDF Translators Supported Language OS Supported Format
PDFgear English, Spanish, German, Japanese and other 50 Languages Windows/macOS/iOS PDF Only, But You Can Convert a File in Another Format to PDF with PDFgear
Google Translate English, Spanish, German and other 130 Languages Online/Android/iOS PDF, Docx, PPXT, XLSX
DocTranslator English, Spanish, German,

Japanese, Portuguese and other 105 Languages

Online/Windows/iOS PDF, Word, Excel, PPTX
SmartCAT English, Spanish, German,

Japanese, Portuguese and other 275 Languages

Online/Windows/macOS/Linux/iOS PDF, Word, Excel, PPXT, XLIFF
DeepL English, Spanish, German,

Japanese, Portuguese and other 26 Languages

Online/Windows/macOS/iOS/Android PDF, Docx, PPTX
MateCAT English, Spanish, German,

Japanese, Portuguese and other 200 Languages

Online PDF, Docx, PPXT, XLSX and 80 more file formats
SDL Trados English, Spanish, German,

Japanese, Portuguese and other 52 Languages

Windows, macOS PDF, Docx, PPXT, XLSX and 80 more file formats


PDFgear can offer you brand-new PDF translation experiences with the help of AI. Upload a PDF, whether it is a research paper or book, then enter a prompt like translate this following content into Spanish for me and copy the content you want to translate, you will soon be able to read the document in the language you are familiar with. The result is rather satisfying. Since AI is developing, translation quality is improving.

Never mind if you only have a scanned PDF at hand. PDFgear can help turn the image into editable text with the OCR feature and then translate it.

PDFgear AI PDF Translator

PDFgear AI PDF Translator

Other AI-related Features of PDFgear

  • Summarize a PDF: Get all key points of your PDF without reading it thoroughly in seconds.
  • Chat with PDF: Answer all your questions about the PDF content with the most advanced language processing model – ChatGPT 3.5.
  • Edit the PDF Through Any Prompt with the Help AI: It is always easier to say than be done. Tell PDFgear Copilot what edit you want to make and let it finish the task.

Google Translate

Google Translate is one of the online free AI PDF translators most people would turn to. It supports 133 languages and uses NMT (neural machine translation) to maximize the translation quality. You can always use it to get proper translations instantly.

You can copy and paste the content to the window, or upload the entire document to get the translation as long as it is less than 20 MB. Only have a printed PDF at hand? No problem. Upload the photo, Google Translate can extract the words and translate them.

Google Translate

Google Translate


DocTranslator is an AI-powered translator supporting over 100 languages. Since its AI is developing, more languages will be supported. The best part of using DocTranslator to translate a PDF is that the original formatting and layout will be preserved. You will no longer have to adjust the translated content anymore.

It may sound too good to be true, but you are capped at 1000 words, 1 document each day. Besides, you can only check the watermarked translation of one page. Registration is also required.




It is easy to use Smartcat to translate a PDF. Visit, upload your PDF, select the source language and the target language, you will soon get the translation. The OCR feature enables you to translate the content from an image.

Smartcat is a translation platform with the perfect combination of AI and human translation. It uses the best translation engines to deliver context-appropriate results in 280 languages. It also has an integrated marketplace with over 500,000 translators, proofreaders, and agencies to make sure you get the best translation service.

Smartcat AI Translator

Smartcat AI Translator


DeepL claims to be the world’s most accurate AI PDF translator that works online, on Windows desktop, Android, and iOS. DeepL keeps up with the world-leading deep learning companies and continues to set standards to translate any document with higher accuracy. Many users even say it can surpass Google Translate. Copy and paste anything or drag and drop a PDF to DeepL and have a try.

The shortcoming is obvious. Only 31 languages are supported by DeepL. Also, You can only translate 1500 characters each time, 3 documents each day.

DeepL AI Translator

DeepL AI Translator


Matecat is an open-source online AI-assisted CAT tool. Anyone can use it to translate a PDF for free regardless of the PDF size and amount. After years of development, it now supports over 100 languages. The machine translation tool is reliable because it is integrated with Google Translation.

You will love Matecat because of the improved security and collaboration option. Translating Matecat doesn’t require you to email it or share data. If you want to manually translate the PDF with your teammates, you can split, and manage the translation project within Matecat.

Matecat AI Translator

Matecat AI Translator

SDL Trados

SDL Trados is a software that offers a complete, centralized translation environment for editing, reviewing, and managing translation projects. The corn of SDL Trados is Translation Memory. You can reuse the previously translated content across your translation project.

SDL Trados is for professional translators. Yer, don’t feel disheartened. We can still use it to translate a PDF. This excellent translation software uses the latest AI-assisted NMT (neural machine translation), which means you will always get the best machine translation. By the way, SDL Trados works both on desktop and online. You can check the PDF translation anywhere, any time.

SDL Trados AI Translator

SDL Trados AI Translator


What is the best AI tool for translation?

There are several reliable AI-powered PDF translators available in the market, making it difficult to pinpoint the absolute best one. However, some popular options include Google Translate, PDFgear, and DeepL.

How to translate an entire PDF into another language?

There are many tools you can use to translate an entire PDF into another language. For instance, Google Translate, DocTranslator, and Matecat. Try all the AI PDF translators above and see which one is the best.

Is there AI in Google Translate?

Yes, there is AI in Google Translate. Google Translate has been using AI-assisted NMT (neural machine translation) to constantly improve translation quality. More AI-powered features like contextual translation, and image translation keep coming.


Above are the 7 best AI PDF translators to go. They are all utilizing AI to provide you with the best translations possible. Try them and see which one works best. Since AI is evolving, this list may expand or change. Do remember to come back often and check the latest list of the best AI PDF translators.

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