pdf2zh

English | [简体中文](README_zh-CN.md) | [日本語](README_ja-JP.md)

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, Telegram Group or QQ Group.

Updates

• [Nov. 26 2024] CLI now supports online file(s) (by @reycn)
  
• [Nov. 24 2024] ONNX support to reduce dependency sizes (by @Wybxc)
  
• [Nov. 23 2024] 🌟 Public Service online! (by @Byaidu)
  
• [Nov. 23 2024] Firewall for preventing web bots (by @Byaidu)
  
• [Nov. 22 2024] GUI now supports Italian, and has been improved (by @Byaidu, @reycn)
  
• [Nov. 22 2024] You can now share your deployed service to others (by @Zxis233)
  
• [Nov. 22 2024] Now supports Tencent Translation (by @hellofinch)
  
• [Nov. 21 2024] GUI now supports downloading dual-document (by @reycn)
  
• [Nov. 20 2024] 🌟 Demo online! (by @reycn)
  

Preview

Public Service 🌟

Free Service (https://pdf2zh.com/)

You can try our public service online without installation.

Hugging Face Demo

You can try our demo on HuggingFace without installation. Note that the computing resources of the demo are limited, so please avoid abusing them.

Installation and Usage

We provide four methods for using this project: Commandline, Portable, GUI, and Docker.

Method I. Commandline

1. Python installed (3.8 <= version <= 3.12)

2. Install our package:

     pip install pdf2zh
   

3. Execute translation, files generated in current working directory:

     pdf2zh document.pdf
   

Method II. Portable

No need to pre-install Python environment

Download setup.bat and double-click to run

Method III. GUI

1. Python installed (3.8 <= version <= 3.12)

2. Install our package:

     pip install pdf2zh
   

3. Start using in browser:

     pdf2zh -i
   

4. If your browswer has not been started automatically, goto

   http://localhost:7860/
   

   

See documentation for GUI for more details.

Method IV. Docker

1. Pull and run:

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

2. Open in browser:

   http://localhost:7860/
   

For docker deployment on cloud service:

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.

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.*)"
--share	Get gradio public link	pdf2zh -i --share

Full / partial document translation

• Entire document

  pdf2zh example.pdf
  

• Part of the document

  pdf2zh example.pdf -p 1-3,5
  

Specify source and target languages

See Google Languages Codes, DeepL Languages Codes

pdf2zh example.pdf -li en -lo ja

Translate with Different Services

The table below outlines the required environment variables for each translation service. Make sure to set them before using the respective service.

|Translator|Service|Environment Variables|Default Values|Notes| |-|-|-|-|-| |Google (Default)|google|None|N/A|None| |Bing|bing|None|N/A|None| |DeepL|deepl|DEEPL_AUTH_KEY|[Your Key]|See DeepL| |DeepLX|deeplx|DEEPLX_ENDPOINT|https://api.deepl.com/translate|See DeepLX| |Ollama|ollama|OLLAMA_HOST, OLLAMA_MODEL|http://127.0.0.1:11434, gemma2|See Ollama| |OpenAI|openai|OPENAI_BASE_URL, OPENAI_API_KEY, OPENAI_MODEL|https://api.openai.com/v1, [Your Key], gpt-4o-mini|See OpenAI| |AzureOpenAI|azure-openai|AZURE_OPENAI_BASE_URL, AZURE_OPENAI_API_KEY, AZURE_OPENAI_MODEL|[Your Endpoint], [Your Key], gpt-4o-mini|See Azure OpenAI| |Zhipu|zhipu|ZHIPU_API_KEY, ZHIPU_MODEL|[Your Key], glm-4-flash|See Zhipu| |Silicon|silicon|SILICON_API_KEY, SILICON_MODEL|[Your Key], Qwen/Qwen2.5-7B-Instruct|See SiliconCloud| |Gemini|gemini|GEMINI_API_KEY, GEMINI_MODEL|[Your Key], gemini-1.5-flash|See Gemini| |Azure|azure|AZURE_ENDPOINT, AZURE_API_KEY|https://api.translator.azure.cn, [Your Key]|See Azure| |Tencent|tencent|TENCENTCLOUD_SECRET_ID, TENCENTCLOUD_SECRET_KEY|[Your ID], [Your Key]|See Tencent| |Dify|dify|DIFY_API_URL, DIFY_API_KEY|[Your DIFY URL], [Your Key]|See Dify,Three variables, lang_out, lang_in, and text, need to be defined in Dify's workflow input.| |AnythingLLM|anythingllm|AnythingLLM_URL, AnythingLLM_APIKEY|[Your AnythingLLM URL], [Your Key]|See anything-llm|

Use -s service or -s service:model to specify service:

pdf2zh example.pdf -s openai:gpt-4o-mini

Or specify model with environment variables:

set OPENAI_MODEL=gpt-4o-mini
pdf2zh example.pdf -s openai

Translate wih exceptions

Use regex to specify formula fonts and characters that need to be preserved:

pdf2zh example.pdf -f "(CM[^RT].*|MS.*|.*Ital)" -c "(\(|\||\)|\+|=|\d|[\u0080-\ufaff])"

Preserve Latex, Mono, Code, Italic, Symbol and Math fonts by default:

pdf2zh example.pdf -f "(CM[^R]|(MS|XY|MT|BL|RM|EU|LA|RS)[A-Z]|LINE|LCIRCLE|TeX-|rsfs|txsy|wasy|stmary|.*Mono|.*Code|.*Ital|.*Sym|.*Math)"

Specify threads

Use -t to specify how many threads to use in translation:

pdf2zh example.pdf -t 1

API

Python

from pdf2zh import translate, translate_stream

params = {"lang_in": "en", "lang_out": "zh", "service": "google", "thread": 4}
file_mono, file_dual = translate(files=["example.pdf"], **params)[0]
with open("example.pdf", "rb") as f:
    stream_mono, stream_dual = translate_stream(stream=f.read(), **params)

HTTP

pip install pdf2zh[backend]
pdf2zh --flask
pdf2zh --celery worker

curl http://localhost:11008/v1/translate -F "file=@example.pdf" -F "data={\"lang_in\":\"en\",\"lang_out\":\"zh\",\"service\":\"google\",\"thread\":4}"
{"id":"d9894125-2f4e-45ea-9d93-1a9068d2045a"}

curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a
{"info":{"n":13,"total":506},"state":"PROGRESS"}

curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a
{"state":"SUCCESS"}

curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a/mono --output example-mono.pdf

curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a/dual --output example-dual.pdf

curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a -X DELETE

TODO

• [ ] 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

• Document merging: PyMuPDF

• Document parsing: Pdfminer.six

• Document extraction: MinerU

• Multi-threaded translation: MathTranslate

• Layout parsing: DocLayout-YOLO

• Document standard: PDF Explained, PDF Cheat Sheets

• Multilingual Font: Go Noto Universal

Contributors

Star History