Belin Doc is a free, unlimited AI document translation tool that preserves original document formats using top-tier large language models.
What is Belin Doc?
Belin Doc is a web-based document translation service that accepts PDF, DOCX, PPTX, XLSX, TXT, EPUB, JPG, JPEG, and PNG files and outputs a translated document with the same layout. It runs entirely in the browser and is powered by AI TransPDF API. The platform offers multiple AI models including Gemini-2.5-Flash (default), ChatGPT, Claude, and DeepSeek.
Key Features
- Zero-cost translation — Completely free with no usage limits, no hidden fees, and no credit card required.
- Format preservation — Superior document parsing algorithms maintain original layout including tables, images, and formulas.
- Multiple format support — Supports PDF, DOCX, PPTX, XLSX, TXT, EPUB, JPG, JPEG, PNG, and more.
- Advanced AI models — Choose from Gemini-2.5-Flash, ChatGPT, Claude, and DeepSeek for translation.
- Privacy protection — Files deleted within 24 hours; zero data retention policy.
- No registration required — Start translating immediately without creating an account.
- OCR support — Scanned PDFs and images can be translated using advanced OCR technology.
- Email notification — Option to receive email notice when translation is complete.
Who is it for?
- Academic researchers — Translate research papers, theses, and articles while preserving formatting.
- Business professionals — Translate international documents, reports, and presentations for global communication.
- Cross-border e-commerce operators — Translate product manuals, specifications, and marketing materials.
- Multilingual content creators — Translate content across 60+ languages for diverse audiences.
What can you do with Belin Doc?
- Translate complex documents — Upload a PDF with tables and images; get a translated version with the same structure.
- Process scanned files — Use OCR to translate scanned PDFs or image-based documents.
- Batch translate with limits — Handle up to 2 parallel tasks at a time, with a page limit for translation (20 pages remaining for free tier, with additional speed-ups available).
- Select your preferred AI model — Switch between different LLMs to optimize translation quality for your content.
How does Belin Doc work?
The workflow is straightforward: drag and drop files onto the upload area, select source and target languages, choose an AI model (Gemini-2.5-Flash by default), and click "Start Translation." Advanced settings allow you to enable image translation in PDFs, formula recognition enhancement, email notifications, and priority queue. The tool processes files and returns the translated document with original formatting preserved, typically within 1–10 minutes depending on file size and server load.
FAQ
Is Belin Doc really free?
Yes, Belin Doc is completely free to use with no hidden fees, no credit card required, and no usage limitations for translation. There is a page quota (20 pages remaining) and speed-up limits (0 remaining), but registration provides more quota.
Does Belin Doc support scanned PDFs?
Yes, Belin Doc supports scanned PDFs and images using advanced OCR technology. Simply upload and translate.
What file formats does Belin Doc support?
Supports PDF, DOCX, PPTX, XLSX, TXT, EPUB, JPG, JPEG, PNG, and more.
How long does translation take?
Typically 1–10 minutes depending on file size and server load.
How does Belin Doc protect my privacy?
Files are deleted within 24 hours after translation. No personal information is required. Zero data retention policy.
