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Online PDF translation

Upload a PDF with a text layer and download two PDFs: bilingual and translation-only.

Up to 20 MB · Up to 80 pages · No installation
A 52-page paper averaged about CNY 0.038/page; manuals and user guides cost roughly half as much
Image-only PDFs are not supported yet

Translate a PDF online now
  • Bilingual PDF
  • Translation-only PDF
  • Free preview available
  • Subscription required for download

Preserves layout where possible, for assisted reading of foreign-language PDFs.

A 52-page English paper translated into Chinese: about CNY 0.038/page

The bilingual PDF below was translated from this Baidu Search paper: Towards AI Search Paradigm (arXiv:2506.17188). Its 52 pages used 2,000 credits. At 1,000 credits per CNY 1, the total was CNY 2, averaging about CNY 0.038. Manuals and user guides cost roughly half as much, about CNY 0.019/page。

PDF translation uses Tencent Hunyuan Hy-MT2-Pro. In the evaluation paper Hy-MT2: A Family of Fast, Efficient and Powerful Multilingual Translation Models in the Wild , Tencent Hunyuan reports that the 7B and 30B Hy-MT2 models in fast-thinking mode outperform DeepSeek-V4-Pro and Kimi K2.6 and approach Gemini 3.1 Pro for general translation.

Cover: title, authors and abstract side by side, following the original page layout
Architecture: diagram labels translated with the body text, with both flowcharts aligned
Formulas: symbols and numbering stay in place; explanations below are translated into Chinese

Full bilingual PDF

About 9 MB. Opening this page does not load the file; transfer starts only when you preview or download it. Original: arXiv:2506.17188。

Download bilingual PDF (52 pages)

Useful in these situations

  • Compare foreign-language PDF contracts and manuals

    Download a bilingual PDF with the original on the left and translation on the right on the same page, making clauses or steps easier to check.

  • Send just the translation to a colleague

    Download a separate translation-only PDF, following the original layout where possible.

  • Translate a file on a Mac or phone

    Upload in your browser; no add-in required.

How to use it

  1. Sign in: Open the online tools and sign in to your TopCopilot account with WeChat or SMS.
  2. Upload a PDF: Switch to PDF Translation, choose the target language and upload a PDF with a text layer, up to 20 MB and 80 pages.
  3. Preview the translation: Preview the result first. Free users need a subscription or credit top-up to download; afterward, return to download without translating again. Results are kept for about one hour.

This tool is available to subscribers only.

Frequently asked questions

Does online PDF translation support scanned files?
Image-only PDFs are not supported yet. A selectable text layer is required; scans and image-only pages will show an insufficient-text message.
What are the advantages of TopCopilot PDF translation?
Powered by Tencent Hunyuan Hy-MT2-Pro. In its evaluation paper, Tencent Hunyuan reports that the 7B and 30B Hy-MT2 models in fast-thinking mode outperform DeepSeek-V4-Pro and Kimi K2.6 and approach Gemini 3.1 Pro for general translation. Source: Hy-MT2 paper (https://arxiv.org/abs/2605.22064). The original layout is preserved where possible. Translation works across 14 languages and variants: Simplified and Traditional Chinese, English, Japanese, Korean, Russian, German, French, Spanish, Arabic, Thai, Vietnamese, Indonesian and Malay. Download both bilingual and translation-only PDFs.
How does PDF translation differ from online Word document translation?
PDF translation produces bilingual and translation-only PDFs. To keep editing in Word, use Online Word document translation to upload a .docx, or move the content into Word first.
How is it priced?
Credits are deducted for actual translation usage, with an estimate based on page count before upload. Translating a 52-page English paper into a bilingual PDF used 2,000 credits. At 1,000 credits per CNY 1, that totals CNY 2, or about CNY 0.038 per page. Manuals cost roughly half as much, about CNY 0.019 per page. Insufficient credits do not trigger a silent charge: confirmation is required before charging or downloading. The 500 sign-up credits cover translation and online preview. Downloads require a subscription or credit top-up; afterward, return to download without translating again. Results are kept for about one hour.
Why can't I download immediately after translation?
The 500 sign-up credits cover translation and online preview. A subscription or credit top-up unlocks bilingual and translation-only downloads. Return after subscribing or topping up to download the same result, kept for about one hour, without translating again.

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