What is a PDF translator?

A PDF translator converts the text inside a PDF from one language into another while preserving the original page layout, fonts, tables, and images. Modern AI-powered translators handle context, idioms, and technical vocabulary better than legacy machine-translation tools, supporting 50+ languages out of the box.

Translate PDF — Side-by-Side Editor

Translate PDFs to 100+ languages with AI. Side-by-side source + translation view, bilingual TXT/CSV export, per-paragraph editing, RTL support. Free,

About PDF Translator

PDF Translator translates PDF documents into 100+ languages while keeping the original layout, fonts, tables, and images intact. Unlike copy-paste-into-Google-Translate, the translated PDF is delivered as a real PDF you can share — page numbers, footer references, table cells, and bullet lists all stay in the right place. Translation runs through high-quality engines (NLLB, M2M, and neural-MT) and the source-target glossary keeps proper nouns, code names, and product names consistent across the document.

The two failure modes of online PDF translators are (1) breaking the layout — text overflows, tables collapse, page breaks shift — or (2) translating unreadable OCR garbage from a scanned document. We handle both: layout preservation reflows text within the original text-block boundaries (and warns you when a translation is too long), and scanned PDFs go through high-quality OCR before translation so you're translating clean text rather than mojibake. Free, no signup; the basic translation runs without an account.

How to Use Translate PDF — Side-by-Side Editor

  1. Step 1: Drop your PDF into the drop zone (text-based PDFs preferred; scanned ones auto-OCR first)
  2. Step 2: Pick source language (auto-detect available) and target language from the 100+ list
  3. Step 3: Optionally add a glossary for proper nouns / brand names you want preserved
  4. Step 4: Click Translate — progress bar shows per-page status; typical 10-page PDF takes 20-40 seconds
  5. Step 5: Preview side-by-side, fix any glossary misses, and download the translated PDF (or export to XLIFF / JSON)

Key Features

How We Compare

Compared to desktop alternatives like Adobe Acrobat Pro (starting at $19.99/month), Smallpdf ($12/month for unlimited), or iLovePDF ($9/month Premium), PDF AI Tools delivers comparable quality at $0 for the core feature set. We skip the subscription friction by processing most operations directly in your browser with WebAssembly — no server infrastructure costs to pass on to users. Our AI features (summarization, chat, OCR) use a pay-as-you-go backend that keeps your total cost well under $5/month even for power users.

Frequently Asked Questions

Is the PDF translator free?

Yes — basic translation in 100+ languages is free with no signup. Larger models for higher-quality translation (specialized domains, technical / legal / medical content) and bulk file processing are reserved for the upcoming Pro tier.

Does it preserve the original layout?

Yes — translated text reflows within the original text-block boundaries, so tables, columns, headers, and page numbers stay in place. When a translation is significantly longer than the source (German often is), we warn you and offer auto-shrink-to-fit or manual review. Truly catastrophic layout breaks are rare on well-formed PDFs.

Does it work on scanned PDFs?

Yes. Image-only PDFs are run through OCR (Tesseract for major languages, custom models for CJK / Arabic / Indic) before translation, so you're translating clean text rather than corrupted character recognition output. Scanned-document accuracy depends on scan quality — 300 DPI clean scans work great.

Which language pairs are highest quality?

English ↔ Spanish, French, German, Portuguese, Italian, Dutch, and Japanese are the highest. Chinese (Simplified and Traditional), Korean, Arabic, Hindi, Russian, and Vietnamese are very good. Lower-resource languages (Swahili, Tagalog, Bengali) work but you may want to review specialized terminology with a native speaker.

Is my document private?

Basic translation can run entirely in your browser via on-device NLLB-distill — your document never leaves your device for that pass. Server-side translation (used for higher-quality output) processes through TLS-encrypted servers and deletes immediately after. No training on your data.

Can I translate technical or legal documents?

Yes, but with caveats. The default engine handles general technical content well. For specialized domains (legal contracts, medical records, patent claims), we recommend reviewing with a domain-expert reviewer and using the glossary feature to lock in correct terminology. The Pro tier will offer specialized engine tuning for these verticals.

Who Uses This Tool