pdf2zh

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PDFMathTranslate

PDF scientific paper translation and bilingual comparison.

• 📊 Preserve formulas, charts, table of contents, and annotations (preview).
• 🌐 Support multiple languages, and diverse translation services.
• 🤖 Provides commandline tool, interactive user interface, and Docker

Feel free to provide feedback in GitHub Issues or Telegram Group.

For details on how to contribute, please consult the Contribution Guide.

Updates

• [May 9, 2025] pdf2zh 2.0 Preview Version #586: The Windows ZIP file and Docker image are now available.

[!NOTE]

2.0 Moved to a new repository under the organization: PDFMathTranslate/PDFMathTranslate-next

Version 2.0 official release has been published.

• [Mar. 3, 2025] Experimental support for the new backend BabelDOC WebUI added as an experimental option (by @awwaawwa)
• [Feb. 22 2025] Better release CI and well-packaged windows-amd64 exe (by @awwaawwa)
• [Dec. 24 2024] The translator now supports local models on Xinference (by @imClumsyPanda)
• [Dec. 19 2024] Non-PDF/A documents are now supported using -cp (by @reycn)
• [Dec. 13 2024] Additional support for backend by (by @YadominJinta)
• [Dec. 10 2024] The translator now supports OpenAI models on Azure (by @yidasanqian)

Preview

Online Service 🌟

You can try our application out using either of the following demos:

• Public free service online without installation (recommended).
• Immersive Translate - BabelDOC 1000 free pages per month. (recommended)
• Demo hosted on HuggingFace
• Demo hosted on ModelScope without installation.

Note that the computing resources of the demo are limited, so please avoid abusing them.

Installation and Usage

Methods

For different use cases, we provide distinct methods to use our program:

1. UV install

• Python installed (3.10 <= version <= 3.12)

• Install our package:

  pip install uv
  uv tool install --python 3.12 pdf2zh
  

• Execute translation, files generated in current working directory:

  pdf2zh document.pdf
  

2. Windows exe

• Download pdf2zh-version-win64.zip from release page

• Unzip and double-click pdf2zh.exe to run.

3. Graphic user interface

• Python installed (3.10 <= version <= 3.12)

• Install our package:

pip install pdf2zh

• Start using in browser:

  pdf2zh -i
  

• If your browser has not been started automatically, goto

  http://localhost:7860/
  

  

See documentation for GUI for more details.

4. Docker

• Pull and run:

  docker pull byaidu/pdf2zh
  docker run -d -p 7860:7860 byaidu/pdf2zh
  

• Open in browser:

  http://localhost:7860/
  

For docker deployment on cloud service:

5. Zotero Plugin

See Zotero PDF2zh for more details.

6. Commandline

• Python installed (3.10 <= version <= 3.12)

• Install our package:

  pip install pdf2zh
  

• Execute translation, files generated in current working directory:

  pdf2zh document.pdf
  

[!TIP]

• If you're using Windows and cannot open the file after downloading, please install vc_redist.x64.exe and try again.

• If you cannot access Docker Hub, please try the image on GitHub Container Registry.

docker pull ghcr.io/byaidu/pdfmathtranslate
docker run -d -p 7860:7860 ghcr.io/byaidu/pdfmathtranslate

Unable to install?

The present program needs an AI model(wybxc/DocLayout-YOLO-DocStructBench-onnx) before working and some users are not able to download due to network issues. If you have a problem with downloading this model, we provide a workaround using the following environment variable:

set HF_ENDPOINT=https://hf-mirror.com

For PowerShell user:

$env:HF_ENDPOINT = https://hf-mirror.com

If the solution does not work to you / you encountered other issues, please refer to frequently asked questions.

Advanced Options

Execute the translation command in the command line to generate the translated document example-mono.pdf and the bilingual document example-dual.pdf in the current working directory. Use Google as the default translation service. More support translation services can find HERE.

In the following table, we list all advanced options for reference:

Option	Function	Example
files	Local files	pdf2zh ~/local.pdf
links	Online files	pdf2zh http://arxiv.org/paper.pdf
-i	Enter GUI	pdf2zh -i
-p	Partial document translation	pdf2zh example.pdf -p 1
-li	Source language	pdf2zh example.pdf -li en
-lo	Target language	pdf2zh example.pdf -lo zh
-s	Translation service	pdf2zh example.pdf -s deepl
-t	Multi-threads	pdf2zh example.pdf -t 1
-o	Output dir	pdf2zh example.pdf -o output
-f, -c	Exceptions	pdf2zh example.pdf -f "(MS.*)"
-cp	Compatibility Mode	pdf2zh example.pdf --compatible
--skip-subset-fonts	Skip font subset	pdf2zh example.pdf --skip-subset-fonts
--ignore-cache	Ignore translate cache	pdf2zh example.pdf --ignore-cache
--share	Public link	pdf2zh -i --share
--authorized	Authorization	pdf2zh -i --authorized users.txt [auth.html]
--prompt	Custom Prompt	pdf2zh --prompt [prompt.txt]
--onnx	[Use Custom DocLayout-YOLO ONNX model]	pdf2zh --onnx [onnx/model/path]
--serverport	[Use Custom WebUI port]	pdf2zh --serverport 7860
--dir	[batch translate]	pdf2zh --dir /path/to/translate/
--config	configuration file	pdf2zh --config /path/to/config/config.json
--serverport	[custom gradio server port]	pdf2zh --serverport 7860
--babeldoc	Use Experimental backend BabelDOC to translate	pdf2zh --babeldoc -s openai example.pdf
--mcp	Enable MCP STDIO mode	pdf2zh --mcp
--sse	Enable MCP SSE mode	pdf2zh --mcp --sse

For detailed explanations, please refer to our document about Advanced Usage for a full list of each option.

Secondary Development (APIs)

For downstream applications, please refer to our document about API Details for further information about:

• Python API, how to use the program in other Python programs
• HTTP API, how to communicate with a server with the program installed

TODOs

• Parse layout with DocLayNet based models, PaddleX, PaperMage, SAM2

• Fix page rotation, table of contents, format of lists

• Fix pixel formula in old papers

• Async retry except KeyboardInterrupt

• Knuth–Plass algorithm for western languages

• Support non-PDF/A files

• Plugins of Zotero and Obsidian

Acknowledgements

• Immersive Translation sponsors monthly Pro membership redemption codes for active contributors to this project, see details at: CONTRIBUTOR_REWARD.md

• New backend: BabelDOC

• Document merging: PyMuPDF

• Document parsing: Pdfminer.six

• Document extraction: MinerU

• Document Preview: Gradio PDF

• Multi-threaded translation: MathTranslate

• Layout parsing: DocLayout-YOLO

• Document standard: PDF Explained, PDF Cheat Sheets

• Multilingual Font: Go Noto Universal

Contributors

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