# Thundocs

> Thundocs is a free, browser-based PDF toolkit that runs entirely in your browser — no file uploads, no accounts, no server processing. All PDF operations happen locally on the user's device using WebAssembly and client-side JavaScript.

## What Thundocs Does

Thundocs provides 20+ PDF tools for everyday document workflows:

- **Merge PDF** – Combine multiple PDFs into one file, with drag-and-drop reordering
- **Split PDF** – Extract specific pages or split by page ranges
- **Compress PDF** – Reduce file size while preserving visual quality
- **PDF to Word** – Convert PDF to editable DOCX format
- **PDF to Excel** – Extract tables from PDFs into XLSX spreadsheets
- **PDF to PowerPoint** – Convert PDF slides to editable PPTX
- **PDF to JPG / PNG / WebP** – Export each PDF page as an image
- **JPG/PNG/WebP/TIFF/BMP to PDF** – Batch convert images to PDF
- **Word to PDF** – Convert DOCX to PDF
- **Excel to PDF** – Convert XLSX to PDF
- **PowerPoint to PDF** – Convert PPTX to PDF
- **OCR PDF** – Extract text from scanned PDFs using Tesseract.js (runs in-browser)
- **Protect PDF** – Add password protection and permissions to PDFs
- **Unlock PDF** – Remove password protection from PDFs (requires user's password)
- **Rotate PDF** – Rotate individual pages or entire documents
- **Watermark PDF** – Add text or image watermarks

## Key Differentiators

1. **100% Private** – Files never leave the user's device. Zero server uploads.
2. **Free with no limits** – No file size caps enforced by upload, no page limits.
3. **No account required** – All tools work without signing in.
4. **Multilingual** – Available in 24 languages: English, Spanish, French, German, Italian, Portuguese, Japanese, Hindi, Russian, Korean, Chinese (Simplified & Traditional), Arabic, Bulgarian, Catalan, Greek, Indonesian, Malay, Dutch, Polish, Swedish, Thai, Turkish, Ukrainian, Vietnamese.
5. **Fast** – WebAssembly-powered PDF processing for near-native performance.

## Privacy Model

Thundocs processes all files in the browser using:
- **pdf-lib** for PDF manipulation (merge, split, compress, protect)
- **Tesseract.js** for optical character recognition
- **PDF.js** for rendering and page extraction
- **LibreOffice WASM** (for document conversions)

No analytics are run on file contents. Files are never stored or transmitted.

## Pricing

All tools are free. No subscription, no freemium gating, no watermarks added.

## Target Users

- Students, professionals, and businesses who need quick PDF operations
- Privacy-conscious users who don't want to upload documents to external servers
- International users who prefer a tool in their native language

## Website

- Homepage: https://thundocs.com/
- Merge PDF: https://thundocs.com/merge-pdf
- Split PDF: https://thundocs.com/split-pdf
- Compress PDF: https://thundocs.com/compress-pdf
- PDF to Word: https://thundocs.com/pdf-to-word
- OCR PDF: https://thundocs.com/ocr-pdf
- Protect PDF: https://thundocs.com/protect-pdf
- Blog: https://thundocs.com/blog
- Sitemap: https://thundocs.com/sitemap.xml

## Contact

- Website: https://thundocs.com
- Support: Available via in-app Help Center at https://thundocs.com/help