PDFast: PDF Reader AI & TTS

Open any PDF in seconds — and discover what it really contains.

PDFast is a free PDF reader for Android that goes beyond the printed page. Every time you open a document, the app performs an automatic check that reveals what you can't see: invisible text, hidden instructions, and signs of AI-generated content. Everything happens offline, right on your device, without sending your files to the cloud.

🔎 AUTOMATIC SECURITY CHECK

• Detects hidden text and invisible characters inside the PDF

• Identifies embedded instructions and suspicious metadata

• Flags signs of AI-generated content

• Runs automatically when you open a document

• 100% offline: your privacy is preserved

📖 COMPLETE & FAST PDF READER

• Instantly open PDFs from your device, WhatsApp, email, and downloads

• Auto-resume: returns exactly to the page where you left off

• Page bookmarks to save important passages

• Interactive table of contents and thumbnail grid for quick navigation

• Smart in-text search — finds words even without typing accents

• Vertical or horizontal scrolling, night mode, light and dark themes

• Keeps the screen on while you read

🔊 LISTEN ALOUD (TTS)

• Page text narration using the Android system voice

• Perfect for studying, reviewing exams, or listening to long documents

• Works offline with voices already installed on your device

📄 EVERYDAY TOOLS

• Smart selection: copy numbers and payment codes with one tap

• Recent files history for instant access to your PDFs

• Share documents directly from the reader

⭐ PREMIUM FEATURES (optional one-time purchase)

• Integrity report: detailed verification certificate for your document

• DOCX to PDF conversion

• Text recognition in scanned images (OCR)

🔒 REAL PRIVACY

PDFast was designed to protect your documents:

• Your files never leave your device

• No sign-up, no login, no monthly subscription

• No personal data collection

Keywords: PDF reader, open PDF, offline PDF, TTS voice, artificial intelligence, AI detector, PDF security, document reader, free.

Download PDFast now and read your PDFs with more security and convenience.