An AI PDF translator translates the text inside a PDF or office document and puts it back where the original sat, so you get a translated file rather than a block of plain text. The real test is whether the layout survives. Ten tools follow in no particular order, described from each vendor's own page.
Pasting a PDF into a translation box works for a paragraph. It falls apart on a brochure, a contract or a research paper, where tables, columns, headers and images all need to stay in place. That's the job these tools are built for: you upload the file, and you get the same file back in another language.
The ten below are listed alphabetically and in no particular order. Every description comes from each vendor's own website, read as of Oct 2026. They range from free upload tools to on-premise software for companies that can't let a file leave the building.
AI PDF translators side by side
I checked the free plan column on each vendor's own website, as of Oct 2026. Yes means the page names a free plan, a free version or a free allowance, or calls the product free. Trial only means the page names a time-limited free trial. Not stated means the page I read named neither, so check the vendor's own site before you sign up.
| Tool | Type | Good for | Free plan |
|---|---|---|---|
| ChatPDF | Chat with a PDF | Asking questions of a PDF instead of translating it | Yes |
| DeepL | AI translator with document translation | Drag-and-drop PDF, Word and PowerPoint translation | Trial only |
| DocTranslator | Online document translator | Uploading a document and getting it back translated | Not stated |
| Google Cloud Translation | Developer API | Developers translating formatted documents in batches | Yes |
| Immersive Translate | Bilingual AI translator | Side-by-side translation of PDFs, papers and web pages | Yes |
| Lara Translate | AI translator | Documents that keep their original design | Yes |
| Lingvanex | Machine translation software | Offline, on-premise document translation | Not stated |
| OnlineDocTranslator | Online document translator | Keeping the layout of PDF, Word, Excel and PowerPoint files | Yes |
| Smallpdf | PDF tool suite | Translating PDFs and office files inside a PDF toolkit | Yes |
| Smartcat | AI content translation platform | Teams translating documents, websites and video at scale | Trial only |
Ten AI tools for translating PDFs and documents
ChatPDF
Best for: Getting the gist of a long PDF by asking questions, with built-in citations that anchor each answer to the document.
DeepL
Best for: Translating PDF, Word and PowerPoint files by drag and drop, from a translator that's now also available inside Copilot, ChatGPT and Claude.
DocTranslator
Best for: Uploading a whole document and translating it into any of 108 languages, from PDF to English, Spanish or Portuguese.
Google Cloud Translation
Best for: Developers and IT teams, as the Advanced edition adds formatted document translation, batch translation and domain-specific models across 189 languages.
Immersive Translate
Best for: Reading academic papers and research PDFs side by side with the original, with layout-preserved document translation and subtitle translation too.
Lara Translate
Best for: Professional documents that need to mirror the original design, across 62 file formats, with optional human review on top of the AI.
Lingvanex
Best for: Businesses that can't send files to the cloud, as its on-premise software translates documents without data leaving their own infrastructure.
OnlineDocTranslator
Best for: Keeping a document's original layout while translating it into 109 languages, using the Google Translate service underneath.
Smallpdf
Best for: People who already compress, merge and sign PDFs online and want translation into 20+ languages in the same toolkit.
Smartcat
Best for: Companies localising lots of content, with PDF, document, website and video translators inside one platform.
Will the layout survive the translation?
That's the question that separates a PDF translator from a text translator. A normal translator hands back plain text: no tables, no columns, no images in the right place. A document translator works on the file itself and tries to put the translated words back where the originals were, so a brochure still looks like a brochure.
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When I read the vendor pages, one free tool said it extracts your text while taking special care to keep the exact format and styling of each section, and another promised document translation that mirrors your original design. Those are the claims to test with your own file, because translated text is often longer than the original and has to fit the same boxes.
Four kinds of PDF translator
- File in, file out. Upload a PDF, Word or PowerPoint file and download the translated version. Fastest for one-off documents.
- Side by side. Bilingual readers show the original and the translation together, which suits research papers and contracts you need to understand rather than republish.
- Chat with the PDF. Instead of translating every page, you ask questions about it. Handy for the gist, but you don't get a translated file.
- Platforms and APIs. Translation platforms, on-premise software and cloud APIs suit companies translating documents every day, often with human review or their own servers.
Before you upload a confidential document
Read where your file goes. Free online translators process documents on their own servers, which is fine for a menu and less fine for a contract, a medical letter or anything under an NDA. If privacy matters, look for an on-premise option or read the vendor's data terms first.
How to check a PDF translation
- Translate a short test file with tables, headers and images, and compare the layout.
- Check numbers, dates and names. These should come through unchanged.
- Ask a fluent speaker to read anything that's going to a customer, a court or a regulator.
- Check scanned PDFs separately. If the PDF is a photo of a page, the tool has to read the text before it can translate it.
- Keep the original file, so you can always go back.
If you need to edit the PDF afterwards, my roundup of PDF editors covers the tools for that.
Do you make an AI PDF or document translator? Tool makers can ask to be considered for a featured place on this list.
My plain advice on AI PDF translators
For a one-off document you only need to read, a free file-in, file-out tool or a side-by-side reader is plenty. If the translation is going to customers, use a tool that keeps the layout and then have a fluent speaker check it, because a tidy layout can hide a clumsy sentence. And if the file is confidential, keep it off free websites and choose an option that runs on your own servers.
If you translate for a business regularly, my guide to the essentials of business translation is worth a read, and for video, see my roundup of AI video translation tools.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
What is an AI PDF translator?
It's a tool that translates the text inside a PDF and tries to keep the original layout, so you get a translated file rather than plain text.
Can I translate a PDF and keep the formatting?
Yes. Several tools here say they preserve layout or mirror the original design. Test with a page that has tables and images before you rely on one.
Is there a free AI PDF translator?
Several vendor pages here describe a free translator or a free monthly allowance, shown in the free plan column. Check the limits on each vendor's own site.
Is it safe to upload a confidential PDF to a translator?
Only if you've checked where the file is processed and stored. For sensitive files, use an on-premise option or a vendor whose data terms you've read.
What's the difference between translating a PDF and chatting with it?
A translator gives you the whole document in another language. A chat tool answers questions about the document, which is quicker for the gist but doesn't give you a translated file.
