Create PDF, Edit, Sign & AI

Web Design 9

About this app

PDF Pro — Privacy-first document workspace with AI

PDF Pro is a complete PDF workspace where most tools run locally on your device. Your files never leave your phone unless you choose to share them. Create, edit, sign, convert, compress, merge, split, redact, annotate, securely share, chat with and translate PDFs with AI — all in one privacy-first app.

🔒 PRIVACY-FIRST ARCHITECTURE
Compress, merge, split, convert, annotate, sign, fill forms, redact, rotate and reorder all run on-device via WebAssembly and pdf.js. No uploads, no tracking, no content analytics. AI processes only extracted text — never the file — and discards it after the response.

🤖 AI-POWERED ANALYSIS
• AI Summarizer — executive summaries, key-point bullets and structured analyses with page-level citations. Great for reports, research papers, contracts and lecture notes.
• AI Chat — ask anything about your document in plain language. Multi-turn, document-grounded answers with page citations. Supports 100K+ token documents.
• AI OCR — extract clean, searchable text from scanned PDFs and images. 100+ languages.
• Smart Search — semantic search across long documents.

🌐 AI TRANSLATION
Translate PDFs into 50+ languages with the original layout preserved. A side-by-side view shows source and translation in two columns — accurate even for technical and legal text.

📝 EDIT, ANNOTATE & SIGN
Edit existing text directly in the PDF and fix typos in place. Highlight, underline, strikethrough, sticky notes, comments, freehand drawings, custom stamps, Unicode text boxes, redact (true black-out, not a visual cover), handwritten plus cryptographic ECDSA P-256 signatures with an embedded verification trail, and fill PDF forms (text, checkboxes, radio, dropdowns, signatures).

🔧 CONVERT & TRANSFORM
PDFs to and from Word (editable .docx with paragraphs and tables), Excel (.xlsx), PowerPoint (.pptx), images (PNG/JPG/WebP with DPI control) and plain text. Smart compression with size targeting (e.g. Gmail's 25 MB cap). Merge with drag-to-reorder and bookmark preservation. Split by range, per page or by bookmark.

📄 CREATE PDFs FROM SCRATCH
Rich-text editor: headings, bullet lists, tables, full Unicode and multi-language fonts (Cyrillic, Greek, Turkish, Arabic, CJK), embedded images, page numbering, headers and footers. Or scan paper documents with your camera via on-device OCR.

🌍 12-LANGUAGE INTERFACE
Native UI in English, Türkçe, Deutsch, Español, Français, Русский, Polski, Português, Italiano, 简体中文, 日本語 and हिन्दी. Your language preference syncs automatically between the web app (pdfpro.tools) and mobile.

🆓 FREE WITH FAIR PRICING
Free: all non-AI tools unlimited + 3 AI ops per month. Pro: 250 AI ops per month + larger files. Pro Plus: 600 AI ops per month + priority processing. No ads, no watermarks, no trial countdowns.

🛡️ END-TO-END ENCRYPTED FILE SHARING
When you choose to share a PDF, PDF Pro uses true end-to-end encryption with zero-knowledge architecture:
• AES-256-GCM authenticated encryption with built-in integrity verification
• Key derived in your browser via PBKDF2-SHA-256 (100,000+ iterations), or randomly generated for fragment mode
• The key never leaves your device — in fragment mode it lives in the URL hash (#), which browsers never send to servers
• Only ciphertext is uploaded — our servers cannot read your file. No key escrow, no backdoor.
• Signed with ECDSA P-256 and SHA-256 fingerprints for tamper-proof audit trails
• Auto-expiring links (24h free / 30d Pro) and a burn-on-read option

The same architecture Signal and WhatsApp use for messages — applied to PDF sharing. Whitepaper: https://pdfpro.tools/zero-knowledge-pdf-sharing

Privacy policy: https://pdfpro.tools/privacy
Support: [e-mail]
Web: https://pdfpro.tools

What’s new

Added 4 new languages: Italian, Simplified Chinese, Japanese, and Hindi. The native app interface (tabs, Settings, tool screens) is now fully localized, and the app chrome correctly follows your selected language.