PDFs are the most widely used format for sharing important documents. However, if you’re working with clients or team members from different parts of the world, you will need to translate PDFs, so everyone can be on the same page.
Fortunately, many online tools allow you to translate PDFs directly. In this guide, you will learn three effective ways to translate PDF online, with detailed steps, and a comparison to help choose the right one. So, make sure to read till the end.
Can I Translate Text in a PDF?
Yes, you can translate text in a PDF by using AI-based translation tools. These tools can be dedicated PDF translators or general AI platforms that accept prompts for translation. Since these tools use large language models, they can understand the document’s context and produce a precise translation. Moreover, their extensive training data allows them to handle a wide range of languages with high accuracy.
How to Translate PDFs Online with Software
Now that you know it’s possible to translate PDF online, here are the three most effective methods that can help you.
Method 1. Translate PDF with UPDF AI Online
UPDF AI Online is a smart AI assistant designed specifically to handle PDFs more productively. It is based on the advanced models of ChatGPT 5.1 and DeepSeek R1 and offers three modes for PDF translation. You can translate an entire PDF at once, by pages, or translate specific text by copying and pasting it. What is more, this online AI assistant has been integrated into the UPDF app, so besides translating PDFs, you can also edit, annotate, convert, and do more to your PDF files by downloading one app.
Steps to Translate PDF with UPDF AI Online
Step 1. Go to the official webpage of UPDF AI Online. Log in to your account. Then, press “Upload File” or drag your PDF to the interface.
Step 2. Wait for your file to upload. Then, click “Start Chat with PDF.”
Step 3. To translate the entire PDF at once, click the down arrow next to “Side-by-Side Translation” at the top. Then, choose an output language from the dropdown menu.
Step 4. Click on “Side-by-side Translation” at the top to start the process.
Step 5. Once the translation is complete, you can view it alongside the original document. Click “Download” at the top to store the file.
Alt-text: click the download button
Tip: If you want to translate a specific page range, click the “Translate PDF” option on the right and choose “Page-by-Page Translation.” Next, select the page range and the translation language. Then, click “Translate.”
Pros
- Flexible translation modes give you more control over the output.
- Side-by-side translation lets you compare the results quickly.
- You can download the translated file directly.
- It offers accurate translations across various languages.
- It automatically maintains the original file format.
- It supports translating scanned PDFs.
Cons
- You can upload only 5 files for free.
Method 2. Translate PDF with ChatGPT
ChatGPT is a powerful AI assistant that can translate PDF online with simple text prompts. It supports a wide range of languages and allows you to translate an entire file at once or specific parts of the PDF text. In addition, it can convert translations into a new PDF and even lets you format or edit PDF style with manual prompts.
Steps to Translate PDF with ChatGPT
Step 1. Go to ChatGPT and log in with your account. Then, click the “+” button on the left of the prompt box and choose “Add photos & files.”
Step 2. Upload the PDF you want to translate. Then, write a prompt, “Translate the text in this PDF from (original language) to (translation language).” Press “Enter” to send it.
Step 3. Once ChatGPT translates the PDF, you can ask it to create a PDF of the translated text. For example, “Convert this translation into a PDF file.”
Step 4. ChatGPT will generate the translated PDF file. Click the download link to save it.
Pros
- The prompt-based interface is quick and easy to use.
- You can translate the PDF and generate a new PDF on the same platform.
- You can format the output through follow-up prompts
- Flexibility to translate the entire file or parts of it.
Cons
- You can upload a limited number and size of PDFs.
- It doesn’t automatically preserve the original layout.
- It requires multiple prompts to get your desired output.
Method 3. Translate PDF with ChatPDF
ChatPDF is another prompt-based AI tool that’s built specifically for document analysis. Based on the GPT-4o and GPT-4o mini models, it lets you translate selected text from your PDFs into almost any language. You can translate by page with manual prompts or send specific text directly to the chat for translation.
Steps to Translate PDF with ChatPDF
Step 1. Visit ChatPDF’s official webpage. Then, drag and drop the file or click “Upload” to import your PDF.
Step 2. When the PDF opens, highlight the text you want translated. Then, click the icon labelled “Ask question about this” from the floating toolbar.
Alt-text: select ask question about this
Step 3. Your selected text will appear in the prompt box. Type “Translate this text into (your desired language).” Then, press “Enter.”
Pros
- You don’t need to sign in to translate your files.
- You can view the PDF and select text directly for translation.
- It can translate specific pages with manual prompts.
- Selective text translation makes it suitable for multi-lingual documents.
Cons
- It cannot translate entire PDFs in one step.
- It does not preserve the original document layout.
- The free version allows only two file uploads per day.
Comparison of the Above Three Methods for Translating PDFs Online
The methods above offer effective ways to translate PDF online. But the right tool should always be the one that best meets your needs. Here’s a quick comparison to help you choose wisely.
| Metrics | UPDF AI Online | ChatGPT | ChatPDF |
| One-click Translation | Yes | No (Requires manual prompts) | No (Requires manual prompts) |
| Side-by-side Translaton | Yes | No | No |
| Page by Page Translation | Yes | Yes (with manual prompts) | Yes (with manual prompts) |
| Selective Text Translation | Yes | Yes | Yes |
| Translate Scanned PDF | No (Possible with UPDF AI App) | Yes | Yes |
| Language Supported | 27 languages (full PDF + page translation); 12 languages for side-by-side translation; All global languages (manual chat translation) | All global languages | All global languages |
Conclusion
That wraps up our guide on the best ways to translate PDF online. To sum it up, ChatPDF works well for translating specific sections of a PDF. In contrast, ChatGPT offers more control through manual prompts.
But if you want a more accurate option with flexible translation modes, UPDF AI Online can be your go-to. It’s much faster and easier to use. Plus, you don’t need to design complex prompts. You can also try it immediately with a limited free trial.