# PDF Pro

> Privacy-first PDF workspace. Create, edit, sign, compress, convert, annotate, translate, OCR, and chat with PDFs. Most operations run client-side in the browser — no upload, no signup required for core tools. AI features and account sign-in require a connection. Available as a web app, Windows desktop app, Chrome extension, and Android app, in 8 languages (EN, TR, DE, ES, FR, PL, PT, RU).

## Core PDF tools

- [Merge PDF](https://pdfpro.tools/merge): Combine multiple PDFs into one file, runs entirely in the browser.
- [Split PDF](https://pdfpro.tools/split-pdf-online): Extract pages or split a PDF into multiple files, no upload.
- [Compress PDF](https://pdfpro.tools/compress): Reduce PDF file size while preserving quality, client-side.
- [Convert PDF](https://pdfpro.tools/convert): Convert PDFs to Word, Excel, PowerPoint, JPG, PNG, and plain text.
- [Create PDF](https://pdfpro.tools/create-pdf): Build PDFs from scratch with text, images, and formatting.
- [Crop PDF](https://pdfpro.tools/crop-pdf): Trim PDF page margins or crop to specific regions.
- [Annotate PDF](https://pdfpro.tools/annotate): Highlight, comment, draw, and add notes to PDFs.
- [Watermark PDF](https://pdfpro.tools/watermark-pdf): Add text or image watermarks to PDF pages.
- [Sign PDF](https://pdfpro.tools/sign): Cryptographically sign PDFs locally with RSA or ECDSA signatures.
- [OCR PDF](https://pdfpro.tools/ocr): Extract text from scanned PDFs using in-browser Tesseract.js (free, unmetered).

## Convert to PDF

- [Word to PDF](https://pdfpro.tools/word-to-pdf): Convert DOCX files to PDF.
- [Excel to PDF](https://pdfpro.tools/excel-to-pdf): Convert XLSX spreadsheets to PDF.
- [JPG to PDF](https://pdfpro.tools/jpg-to-pdf): Combine images into a single PDF.
- [HTML to PDF](https://pdfpro.tools/html-to-pdf): Render HTML documents as PDF.
- [Text to PDF](https://pdfpro.tools/text-to-pdf): Convert plain text files to PDF.

## Convert from PDF

- [PDF to Excel](https://pdfpro.tools/pdf-to-excel-online): Extract tables from PDF into editable XLSX.
- [PDF to JPG](https://pdfpro.tools/pdf-to-jpg-online): Convert PDF pages to JPG images.
- [PDF to PNG](https://pdfpro.tools/pdf-to-png-online): Convert PDF pages to PNG images.

## AI features

- [AI Chat with PDF](https://pdfpro.tools/chat-with-pdf): Ask questions about any PDF and get structured answers, tables, charts, and downloadable reports. Powered by GPT-4o.
- [AI PDF Summarizer](https://pdfpro.tools/ai-pdf-summarizer): Generate concise summaries from long PDFs in seconds.
- [AI Translate PDF](https://pdfpro.tools/translate): Translate PDFs to 50+ languages while preserving layout.
- [AI Chat (general)](https://pdfpro.tools/ai-chat): Document intelligence chat — multi-language, classifier-driven architecture using GPT-4o-mini for routing and GPT-4o for execution.

## Privacy & security

- [Security overview](https://pdfpro.tools/security): How PDF Pro protects user data — client-side processing, zero-knowledge architecture, no document uploads for core tools.
- [Secure Transfer](https://pdfpro.tools/secure-transfer): Send PDFs through end-to-end encrypted, expiring share links. Files are encrypted in the browser before upload; PDF Pro servers never see plaintext.
- [Zero-knowledge PDF sharing](https://pdfpro.tools/zero-knowledge-pdf-sharing): Technical overview of the encryption scheme used in Secure Transfer (AES-256-GCM with key never sent to server).

## Apps & extensions

- [Windows app](https://pdfpro.tools/microsoft-store): Desktop app for Windows 10/11, distributed via the Microsoft Store (certified, sandboxed AppX, auto-updates).
- [Android app](https://pdfpro.tools/android-app): Mobile app on Google Play.
- [Chrome extension](https://pdfpro.tools/chrome-extension): Browser extension for quick PDF tools.

## Guides

- [Guides index](https://pdfpro.tools/guides): How-to articles covering compression, conversion, OCR, annotation, splitting, merging, and more.

## Optional

- [How to compress PDF without losing quality](https://pdfpro.tools/guides/how-to-compress-pdf-without-losing-quality)
- [How to convert PDF to Word editable](https://pdfpro.tools/guides/how-to-convert-pdf-to-word-editable)
- [How to merge PDF files without uploading](https://pdfpro.tools/guides/how-to-merge-pdf-files-without-uploading)
- [How to OCR a PDF](https://pdfpro.tools/guides/how-to-ocr-a-pdf)
- [How to split PDF online without upload](https://pdfpro.tools/guides/how-to-split-pdf-online-without-upload)
- [How to annotate a PDF](https://pdfpro.tools/guides/how-to-annotate-a-pdf)
- [How to crop a PDF](https://pdfpro.tools/guides/how-to-crop-a-pdf)
- [How to add a watermark to a PDF](https://pdfpro.tools/guides/how-to-add-a-watermark-to-a-pdf)
- [llms-full.txt](https://pdfpro.tools/llms-full.txt): Detailed feature reference, pricing, architecture, and full tool catalog for AI assistants.