Batch translation · Multi-AI parallel · Multilingual comparison export. Supports PDF, Word, PPT, Excel, SRT, CAT formats. Drag in once to translate in parallel with perfect formatting preserved. All documents are processed locally—no server uploads.
A modern document translation and AI tool built for efficiency.
Batch translate PDF, Word, PPT, Excel, SRT, CAT, and more. Multi-engine parallel processing, perfect formatting preservation, and one-click multilingual comparison export.
Translate the same file with multiple engines simultaneously. 1:1 / 1:N / N:N modes for easy comparison and selection of the best output.
Source text + multiple translations in a clear comparison layout. One-click export of comparison documents for direct review and proofreading.
Your data, your rules. Original documents are never uploaded. Chat history, translation history, and API configurations are stored strictly on your local device.
Discover how ITransBook boosts your productivity
Batch translate PDF, Word, PPT, Excel, SRT, CAT, and more. Multi-engine parallel processing with perfect formatting preservation. Export multilingual comparison documents in one click. All files are processed locally without uploads or downloads.
Use one translation engine to translate a file into one target language. Ideal for scenarios requiring only one translated version.
Use multiple engines to translate a file into the same target language. Get multiple translated versions at once for easy comparison.
Use multiple engines to translate a file into multiple target languages. Drag in once to output translated files in multiple languages.
Chat with multiple AI models side by side, instantly compare responses, and gain comprehensive insights.
Multi-engine comparison translation for precise semantic understanding. Enter text once to get parallel results from multiple translation engines, supporting both cross-language and same-language style comparisons.
Select text in any application to automatically pop up a translation window displaying results from multiple engines simultaneously.
Choose the plan that best fits your needs
Out-of-the-box ready, no API key configuration needed. Buy more credits at once for a lower unit price.
Google 1000 chars = 30 Credits ｜ DeepL 1000 chars = 40 Credits ｜ GPT-5.6-sol 1000 tokens = 20 Credits ｜ GPT-5.6-luna 1000 tokens = 1 Credit ｜ DeepSeek-v4-flash 1000 tokens = 1 Credit ｜ DeepSeek-v4-pro 1000 tokens = 4 Credits ｜ Claude-kaiku-4-5 1000 tokens = 5 Credits ｜ Claude-opus-5 1000 tokens = 25 Credits ｜ Gemini-3.8-flash 1000 tokens = 8 Credits
The above are only partial examples of engines and models. For complete and real-time credit deduction rules, please refer to the "Credit Deduction Rules" page within the app.
Free Plan includes core features like AI Chat, Text Translation, Select-to-Translate, and Shortcut Translation, but does not support File Translation. You need to use your own API key or local model (you can also purchase credit packs for cloud APIs).
VIP Plan also requires your own API key or local model (or purchased credits), but additionally provides unlimited File Translation and priority technical support.
VIP Plus Plan includes bonus credits (no API key required), making it perfect for users who want out-of-the-box functionality without configuration.
Unless otherwise stated, all plans share the same core features. Please see the pricing cards for a detailed comparison.
This means you can input API keys from third-party translation/AI services like Google, DeepL, OpenAI, DeepSeek, Claude, or Gemini. ITransBook operates solely as a client and does not charge extra fees. You can register and apply for keys on the respective providers' official websites—some even offer free tiers. For detailed setup instructions, please refer to the User Manual.
Credit Usage: Credits are used to offset character consumption for standard engines (Google, DeepL) or token consumption for AI services (OpenAI, DeepSeek, Claude, Gemini, etc.). Using your own API key does not consume credits.
Purchased Credit Packs: You can purchase credit packs directly in the app. These credits are valid permanently and never expire or reset. You can check your balance anytime. Multiple specifications are available; the more you buy, the lower the unit price, making them ideal for users with variable usage.
VIP Plus Bonus Credits: Credits gifted through the VIP Plus plan are only valid during the active membership period; unused bonus credits will be cleared upon membership expiration.
ITransBook supports 100+ major global languages, covering English, Chinese, Spanish, French, German, Japanese, Korean, Russian, Arabic, Portuguese, and more. Whether you need to translate business documents, academic materials, or daily communication, it handles it effortlessly. It also supports translation between less common languages to meet global communication needs.
ITransBook supports common formats like PDF, Word (.docx), PowerPoint (.pptx), Excel (.xlsx), Subtitles (.srt), Plain Text (.txt), as well as CAT files like Trados (.sdlxliff) and MemoQ (.mqxliff). Using advanced document parsing technology, it preserves original layouts, tables, images, and fonts, delivering high-quality multilingual comparison or translation-only documents.
Mode (1:1): Single language, single engine. Ideal for scenarios requiring only one translated version.
Mode (1:N): Single language, multiple engines. For example, simultaneously use DeepSeek and DeepL to translate an English document into French, getting two translated versions at once for easy comparison.
Mode (N:N): Multiple languages, multiple engines. For example, use Google to translate English to Chinese, and DeepSeek to translate English to German. Drag in once to output translated files in multiple languages simultaneously.
After file translation is complete, click [More] → [Export Comparison Translation]. Freely select the source text and translations generated by each engine, and export a document with the source text + multiple translations displayed in a comparison layout in one click. Automatic layout means no manual copy-pasting is needed, allowing direct review and proofreading of the comparison document.
ITransBook supports AI service interfaces like OpenAI, DeepSeek, Claude, and Gemini by default. You can also add custom AI services in the settings. Ask different models simultaneously in the same interface and compare responses in parallel—perfect for research, writing, and decision support.
It supports the vast majority of mainstream applications: browsers (Chrome/Edge/Safari, etc.), PDF readers (Adobe Acrobat, Preview), Office software (Word, Excel, PowerPoint), Notepad, chat apps, and more. As long as the software is based on standard text rendering, select-to-translate or hover translation can be achieved without switching windows.
Yes. ITransBook provides a global keyboard shortcut (customizable in settings, e.g., Ctrl+Q). Simply select text in any application and press the shortcut to instantly view the translation result.
No. Your documents and data belong entirely to you.
We offer two levels of privacy control:
Absolute Privacy Mode: Use supported LocalAI models for file translation and AI chat. In this mode, all operations from document parsing to AI inference are completed offline on your device. No type of data leaves your device.
Online Mode (Cloud API Services): If you choose to use cloud AI services, only the extracted text is sent for processing via API. Whether you use your own API key or ITransBook's credit service, according to our architecture, your original document files never leave your local device. We operate solely as a client.
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