The ultimate guide on how to translate PDF: 9 free tools, best practices, and more

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From formatting issues, text extraction difficulties, file size and complexity, and confidentiality concerns, translating PDF files does not come without its challenges. However, thanks to AI technology, machine learning, OCR (optical character recognition) technology, and worldwide community language contributions, translators and teams now have the choice of a multitude of cutting edge PDF translation tools that can overcome these obstacles and produce the results they need, effortlessly.

What does PDF stand for and why are PDFs important for businesses?

Did you know that PDF is short for portable document format ? It is a type of file format (.pdf) that Adobe created in the 90s. A PDF is designed to be an easily shareable, self-contained electronic document that preserves its exact layout. No matter where it is viewed or printed, it should be easily viewed exactly as the creator intended.

Have you ever opened a document in Word (or other office software) and seen fonts or images go crazy? Or embedded videos and images refuse to load? PDFs don’t have those problems, and that’s what makes them so great for businesses. When you create and share a PDF, you know it’s going to ‘just work’.

This makes PDFs ideal for sharing your business communications, as you can be sure of what the recipients will be seeing. Whitepapers, presentations, reports, flyers—PDFs are great for all these and more. Other advantages of PDFs include:

  • They are easily viewable on free software that everyone has access to

  • They can contain images, videos, and links

  • They can be protected by passwords, e-signatures, and encryption protocols

  • They are hard to tamper with, providing extra security for sensitive data

All these benefits make PDFs an important business tool. It should not be neglected, especially when it comes to translation for other markets. Read on to learn about the importance of translating PDFs for companies, the challenges they may face, and best practices for successful translation.

Why should companies translate PDFs?

The benefits of translating PDFs for companies are numerous. Translation allows companies to reach a wider audience and expand their business, and PDFs are an essential part of that. Here are the top reasons your company should translate PDFs:

Engage a global audience

If your business wants to operate in multiple markets, it pays to be able to communicate in that market’s native language. By translating PDFs into different languages, companies can effectively communicate with their target market, build trust, and increase their customer base.

Build trust with your customers

Translating PDFs can also improve a company’s credibility and professionalism. By providing translated materials, companies show their commitment to understanding and meeting the needs of their international customers. This can lead to better customer satisfaction and loyalty.

Cost-efficiency

While translating a PDF does involve some upfront costs for a company, it will save money in the long term. Re-using untranslated documents in English for international markets will only be effective for fluent English speakers in that region. This makes each document much less valuable in terms of its reach and sales. But when you translate your PDFs or other materials, they regain 100% of their potential to win conversions. Therefore, after the initial investment, businesses will gain more value for money from their translated PDFs.

What happens if companies don’t translate PDFs?

The consequences of not translating PDFs can be significant. Firstly, it can result in miscommunication and misunderstandings with potential customers. This can create a negative image for the company and damage its reputation.

Moreover, not translating PDFs can lead to lost business opportunities. If potential customers cannot understand the information presented in a PDF, they are likely to look for alternative options. This can result in lost sales and revenue for the company.

Challenges in translating PDFs

Translating PDFs can be a complex and time-consuming process. This is partly by design, but some issues may also arise from the translation services used.

Technical issues with translating PDFs

PDFs are supposed to be complete, print-ready documents suitable for official distribution. Therefore, they are deliberately difficult to change without specialized software. This applies to translating as well as editing.

PDFs also usually contain images or design elements that can cause problems while translating. Some languages need more space than others to convey the same information. If the text of a PDF is changed, then the images and design may no longer fit.

Problems with PDF translation by agency

When a business wants to translate a PDF, they can contract a professional translation agency to do it for them. However, there are issues with this method.

Many translation agencies will only translate text literally, as they lack the localization skills to adapt the text properly to a new culture. Furthermore, most translation agencies do not have the graphic design specialists on their teams to help with non-text elements. Some of the challenges that companies may face include poor language quality, lack of cultural appropriateness, inconsistent terminology, and difficulty in localizing images. Additionally, the original English text may be too long, resulting in spacing issues when translated into other languages.

Another challenge is the slow turnaround time from translation agencies. Important meetings or presentations may be delayed due to the inability to get translated PDFs back on time. This can have a negative impact on a company’s operations and reputation.

Luckily, you don’t have to struggle with PDF editors or an agency to get a fast, high-quality PDF translation nowadays. Thanks to AI, it’s never been easier to translate any type of file in just a few seconds. Below, we’ll show you how, step-by-step.

How to translate PDFs with AI

A translation platform that uses AI can not only speed up translations, but make it easy to do from your own device. For example, Smartcat is a translation management platform that offers an efficient and streamlined approach to translating PDFs or other files. Here’s how it works:

  1. Go to the Smartcat web page and sign up for free.

  2. Drag and drop your file into the Smartcat file translator to start the translation. Smartcat’s AI technology provides contextual and near-human quality translations. Most translations take only seconds, or minutes at the most.

  3. Review and edit the translation in the Smartcat Editor. The editor comes with a preview of the presentation, allowing you to see the translations in context. You can also invite local teams to collaborate and review the translations, making necessary edits.

  4. Hire a subject matter linguist from the embedded Smartcat marketplace. The platform offers a wide range of experienced translators in various fields, ensuring high-quality and accurate translations. AI also helps you to quickly find the right collaborators for your project.

  5. Store your files on Smartcat to access them for future translations. The translation memory feature on Smartcat allows you to reuse previously translated content, saving time and ensuring consistency.

Best practices for translating PDFs

AI translation platforms make the technical side of translating PDFs much easier and more cost-effective, but there’s more to it. Generally speaking, following these best practices from the beginning will make your translation project go much more smoothly.

1. Plan ahead

It is crucial to plan for translation and localization from the initial stages of creating a PDF. This can help avoid potential issues and save time and resources in the long run.

2. Use clear and concise language

When creating a PDF, use simple and straightforward language that is easily translatable. Avoid using idioms, slang, or colloquialisms that may not translate well.

3. Maintain consistency

Consistency is key in translation. Make sure to use the same terminology and style throughout the document to avoid confusion and maintain professionalism. Good translation platforms—like Smartcat—have a translation memory feature that saves your brand style to ensure consistency across all projects.

4. Consider cultural appropriateness

Understand the cultural norms and preferences of your target market and ensure that your PDF is culturally appropriate to avoid any misunderstandings. Research your target market and collaborate with local experts to understand the local culture.

How is text extracted from a PDF?

Most people find it difficult to extract text from a PDF, so you might be wondering how AI does it. Text retrieval from a PDF and its conversion into a translation tool like Smartcat involves several steps.

  1. Firstly, the platform opens the PDF document and extracts using OCR (Optical Character Recognition) software. It then scans the document and recognizes the characters, converting them into editable text.

  2. You can automatically translate the text in seconds using an AI translation engine such as Smartcat AI. Then you can review and edit the translation in AI human workflows by reviewing and editing the translations in Smartcat Editor.

  3. In Editor, the text is then broken down into segments, such as sentences or paragraphs, and is displayed side-by-side with the translation interface in the target language. This allows the reviewer to easily compare the original text with the translated version and make any necessary adjustments.

  4. Smartcat also offers features like translation memory, glossaries, and quality assurance checks to ensure consistency and accuracy in the translation process.

  5. Once the translation is complete, the final version is saved and can be exported back into the original PDF document or any other desired format. This process of text retrieval and conversion into a translation tool like Smartcat not only saves time and effort but also ensures a high-quality translation for any PDF document.

PDFs for learning and development

As a learning and development manager, it is crucial to provide all employees with the necessary learning materials and job aids in their preferred language. This includes translating PDFs for local employee learning guides and job aids. Translated PDFs will help your company:

1. Improve equity and diversity in the workforce

If your company recently opened a branch in a non-English speaking country, consider the language needs of your local employees. While they may be proficient in their native language, they may struggle with understanding complex concepts and instructions in English. By translating PDFs into their native language, you create a level playing field. Now, your team can learn and develop in a language they are comfortable with.

2. Enhance performance and productivity

Translating PDFs for local employee learning guides and job aids can greatly enhance the effectiveness of training and development programs. When employees can fully grasp the material, they are more likely to retain information and apply it in their work. This can lead to improved job performance, increased productivity, and better overall results for the company.

3. Increase happiness and motivation

Furthermore, translating PDFs also demonstrates that the company values and respects the cultural and linguistic diversity of its workforce. It promotes inclusivity and can boost employee engagement and motivation to learn and grow within the organization.

4. Maintain compliance

Having translated PDFs can also be beneficial for compliance and safety purposes. If there are specific regulations or safety protocols that need to be followed in the local language, having these materials translated can ensure that all employees are aware of and understand them.

PDF for marketing and sales collateral

Marketing and sales PDFs, such as one-pagers, presentations, and guides, are crucial for businesses to attract clients and generate revenue. These materials showcase products/services and convince potential customers to make a purchase or sign a deal.

When translating PDFs for marketing or sales outreach, companies must ensure that they do the following:

  • Maintain tone, message, and branding - The most successful brands are both predictable and exciting—no matter where in the world, customers know what they are getting. Using translation memory, included in platforms like Smartcat, makes ensuring consistency across different markets much easier.

  • Understand the target audience's cultural nuances and preferences - This is part of the art of localization—the process of adapting the language, design, and references of media to a different audience. Localizing your PDFs can establish a strong brand image and build trust with potential clients.

Top 9 free tools to translate PDF files

Now that you know the criteria by which to assess a PDF translation tool, let’s dive into our list of the best free PDF translation software for teams and translators.

  1. Google Translate

Overview

Google Translateis an intuitive, fast, and easy-to-use translation tool that’s used by individuals the world over thanks to its wide accessibility and vast multilingual support.

Supported languages

133 languages.

Technology

Machine learning algorithms, community contributions.

Ease of use

Translating a PDF with Google Translate couldn’t be easier. Select your required languages and drag and drop the file onto the cloud image and wait for it to upload. Alternatively, browse the files on your computer and select one to upload.

Accuracy

Google Translate is typically more accurate when translating European languages. Overall, the accuracy of the tool is believed to range between 55% and 94%, with overall meaning preserved in around 82% of translations.

Pros

As with many Google tools, the user experience of Google Translate is very good. The tool boasts a clean and intuitive interface, is easy to use, and highly accessible. Whether you use the in-browser version or the app, the tool can translate copy and pasted text, a range of file types, and, on mobile, can even scan documents with a camera for live translations.

Cons

Google Translate does not offer any security or data protection features. In addition, the tool cannot provide perfectly accurate translation services.

Wow features

Translation history;Live translation of documents on mobile;Number of languages;Speed.

Best suited for

Those who require the fast translation of non-confidential documents for which 100% accuracy is not required.

  1. Smartcat

Overview

Smartcatis an all-in-one translation portal. Users can translate PDF and other file types free of charge, find and work with freelancers from the marketplace, perform detailed post-editing, and enjoy numerous other AI-powered services and workflows.

Supported languages

280+, depending on the translation technology chosen in the settings.

Technology

Machine translation, human editing, AI technologies, OCR.

Ease of use

To get started, users simply create a new project, upload the file, and select language pairs.

Accuracy

Smartcat’s translation tools typically start off at around 85% accuracy. However, this increases as the AI learns an individual’s preferred terminology and writing style. Before long, the accuracy of each translation will reach over 95%.

Pros

Smartcat’s technology is simple to use with an intuitive and accessible interface, enabling translators and organizations to get the results they need quickly. Other benefits include the tool’s ability to translate files of up to 512 MB in size and integrate with multiple other machine translation systems with ease.

Cons

Smartcat is a web-based software, requiring WiFi. Users will also need to register to access tools.

Wow features

Free, cloud-based translation tool for access anywhere;Files can be edited and exported to .docx format;Error detection and automatic correction comes as standard;Integrated marketplace with professional translators and editors for seamless AI human workflows;Highly intuitive interface;Dashboard to view all projects in one place.

Best suited for

All levels: from private use to professional translators.

  1. DeepL

Overview

DeepLis a highly accurate, neural machine translation service, powered by neural networks and the latest AI technology. The tool boasts the ability to capture and reproduce the slightest language nuances in each translation.

Supported languages

32 languages.

Technology

Neural machine translation, OCR.

Ease of use

PDF translation is very straightforward with DeepL. Users simply drag and drop any PDF, Word, or Powerpoint file into the box on the Translate Files page and the files are automatically translated. Formatting of the PDF is preserved and the service is free to all types of users, with no registration required.

Accuracy

DeepL boasts very high accuracy, with a study in 2020 rating its accuracy at 89%.

Pros

DeepL’s PDF translator retains all text formatting, guarantees data security, and is available across all device types.

Cons

The language selection available with DeepL is significantly smaller than its competitors and the text length is limited to 5MB and 5000 words (for free version).

Wow features

Easy implementation of multiple Office software integrations;Consistently very high accuracy;Translation of multiple file types;Instant translation of text on images.

Best suited for

Those looking to translate entire documents in one click.

  1. DocTranslator

Overview

DocTranslatoris a free, online, document translation tool that offers high quality neural machine translations and preserves layouts and formatting.

Supported languages

109 languages.

Technology

Machine translation, OCR.

Ease of use

Users are required to register with the site before they can upload or translate documents.

Accuracy

80-90% translation accuracy depending on the language pair.

Pros

Users can translate up to 2000 words for free without any language restrictions;The tool effectively retains original PDF formatting;Can translate InDesign files;Supports multiple Office files types: .doc, .ppt, .xls, .odt, .pdf, .txt, and more.

Cons

Multiple on-page ads, a poor user experience in manipulating documents after translation, and slow translations (up to 24 hours for large documents) are all disadvantages of the tool.

Wow features

Files can be converted into different file types for free.Word Count Tool functions for all file types with 99% accuracy and is also free to use.

Best suited for

Those who need right-to-left language translation.

  1. DeftPDF

Overview

Specializing in the translation of a wide-range of file formats,DeftPDFis a versatile document translation tool. Available both in-browser and as an app.

Supported languages

130+ languages.

Technology

Machine translation, OCR.

Ease of use

No registration is required to get started, and users can choose between uploading a document from their computer, DropBox, Google Drive, or even a website URL. The interface is clear and easy to understand for beginners.

Accuracy

Accuracy of DeftPDF’s translations is believed to be very good.

Pros

The simplicity and intuitiveness of the tool’s interface is a big advantage to users, as are the features the platform offers in addition to translation such as file editing and conversion. Many of the tool’s features are free of charge.

Cons

Unlimited file uploads for translation are only available with the paid option;Limited document processing with free version;Loading time of large documents can be long.

Wow features

The tool offers users a suite of PDF management services in addition to document translation.

Best suited for

Editors, translators, and teams who frequently translate PDFs with complex layouts.

  1. Yandex Translate

Overview

Russian-based translation tool,Yandex Translate, is a reliable and trustworthy in-browser software that offers robust PDF translation services.

Supported languages

98 languages.

Technology

The tool uses both statistical machine translation andneural machine translationmodels.

Ease of use

The interface is clear and easy to navigate.

Accuracy

Due to the specialist combination of technology used, Yandex translations are considered to be highly accurate.

Pros

Unique algorithms produce more accurate translation results;The tool is completely free of charge;No registration required from users;Intuitive and user-friendly interface.

Cons

Complex PDF (and other) file formats may not be retained once a document has been translated.

Wow features

The standout feature of the tool is its accuracy of translation, particularly in regard to less commonly-translated languages.

Best suited for

Professional translators.

  1. GroupDocs App

Overview

Translation solution,GroupDocs App, translates Microsoft Word, Excel, Powerpoint, PDF, and Markdown files with ease.

Supported languages

104 language pairs.

Technology

Machine learning algorithms and neural networks which run on a high-performance cloud server.

Ease of use

The tool is very user friendly with an intuitive and clean in-browser interface.

Accuracy

The tool is considered to be fairly accurate and promises translation that matches a human.

Pros

The tool works in the browser;Translates multiple file types;High security standards to ensure protection of data;Completely free.

Cons

Limited number of languages compared to other tools;Character limit of 10,000;The quality of translations can vary.

Wow features

The app works across devices, effortlessly;Excellent layout preservation.

Best suited for

All levels: from everyday users to professional translators.

  1. SwifDoo PDF

Overview

SwifDoo PDFis an all-in-one PDF solution.

Supported languages

100+ languages.

Technology

No information published on the translation technology used.

Ease of use

Ideal for beginners thanks to its very clear on-page instructions and user-friendly interface.

Accuracy

Very high.

Pros

SwifDoo offers users an allround PDF editing and translation experience, with features including conversion, editing, and PDF processing;The tool only takes up 30 MB disk space, enabling a faster download speed;Security is paramount. The tool offers two-level password protection, differentiated permissions, and legally binding electronic signatures.

Cons

Users need to register and pay to access all the tool’s features;Relies upon an active internet connection for full functionality.

Wow features

A unique and compelling feature of SwifDoo’s PDF translation service is that users can highlight specific sections or even sentences of a text on a PDF to be translated into another language.

Best suited for

All levels.

  1. Canva’s Free PDF Translator

Overview

Design tool, Canva, has added afree PDF translatorto its suite of features.

Supported languages

134 languages.

Technology

Advanced machine learning technology.

Ease of use

Canva prioritizes the user experience. The tool boasts a seamless and delightful interface that is easy to navigate and which supports users in reaching their goals quickly.

Accuracy

Accuracy is believed to be high.

Pros

The PDF translator puts the translated text on a duplicate page, so users can compare and polish the translated text;Users can also opt to simply replace the existing file with the translated version;Easy sharing of translated PDF files with other team members and stakeholders;The PDF translation tool is completely free of charge (with registration);Original layout and format are preserved while design and text edits are made easy with Canva’s other design tools.

Cons

Although the tool is free, users have to register to get started;Users are dependent on Canva for their entire PDF management, once translation is completed.

Wow features

The simple, attractive, and straightforward design of the tool is its strongest feature.

Best suited for

Professional teams.

PDF Translation Tips and Best Practices

Want to make the best out of your PDF translation? Here are our top tips and best practices to ensure that the process runs smoothly and that you get the results you need, with minimum fuss.

  1. Ensure that your document is not password protected. If it is, the translation service will be unable to translate your file.

  2. If your file has a lot of vector objects (points, lines, curves and shapes), consider flattening these into bitmaps to increase the likelihood of a successful translation of your PDF file.

  3. Insert hyperlinks into your PDF document before you begin translation.

  4. If your file contains formatting elements such as tables, bullet points, or headers, be sure to cross-check the translated file with the original to ensure that they match. By paying special attention to font size and styles as well as alignment, you can maintain consistent formatting on your new document.

  5. Double-check all images that contain text as alignment can vary post-translation.

  6. Don’t forget to customize your translation settings to meet the unique requirements of each PDF file. You may want to configure text segmentation rules or specify target language preferences. Adjusting the settings will improve the overall translation quality and support better formatting alignment, too.

Conclusion

In this post, we’ve walked you through our favorite PDF translation tools, offered practical guidance for assessing this technology, and provided tips and best practices to ensure your PDF file translation runs smoothly. If you’d like to learn more about AI translation and how it could support your team, head back to the Smartcat blog for more insightful articles like this one.

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