Joyful, Fast & Ad-Free
Android PDF Reader
Engineered with Flutter and native PDFium. Instant hardware rendering, in-place file rename, an isolated offline library, and zero intrusive permissions — built with pure joy.
Everything You Need in a Modern PDF App
Explore the core architecture and user-first features of Smiley PDF.
High-Performance PDF Viewer & In-Place Rename
Powered by native PDFium (pdfrx) for instantaneous page turns.
Smiley PDF renders multi-hundred page manuals, textbooks, and scanned invoices with zero stutter. Fluid pan and pinch-to-zoom gestures, instant bookmarking, and native file management built directly into the reading chrome.
Hardware Accelerated Engine
Native PDFium rendering delivers crisp 60fps pan and pinch-to-zoom without fuzzy blurry downscaling.
In-Place Document Rename
Tap the document title bar anytime to edit file names directly on storage without leaving your reading flow.
Document Metadata Modal
Inspect exact file size, total page count, last modified timestamp, and full sandbox or storage path.
1-Tap Save & Unsave
Instant bookmark toggle safely copies files into your offline sandbox or unsaves with a lightweight snackbar toast.
All More Tools Coming to Smiley PDF
Smiley PDF is expanding from a joyfully fast reader into a complete, 100% free and ad-free on-device PDF power suite.
OCR Text Extractor
Extract copyable text from scanned PDFs, receipts, and images using on-device neural OCR with zero cloud uploads.
Camera Document Scanner
Snap multi-page documents with automatic edge detection, perspective flattening, and instant PDF compilation.
PDF Password Protector
Encrypt sensitive bank statements and contracts with military-grade AES-256 encryption directly on your phone.
Merge & Split Studio
Reorder pages with visual drag-and-drop, extract specific page ranges, and merge multiple documents into one file.
Why Users Choose Smiley PDF
See how Smiley PDF compares to typical ad-heavy store PDF readers.
| Feature & Privacy Check | 😄 Smiley PDF | Typical Store PDF Apps |
|---|---|---|
| Advertisements & Popups | ✓ 100% Zero Ads Forever | ✕ Intrusive banners, interstitials & video ads |
| Storage Permissions | ✓ Scoped SAF (No Dangerous Rights) | ✕ Demands All-Files-Access (scans whole device) |
| Rendering Engine | ⚡ PDFium Native (Instant 60fps) | Slow WebView or heavy laggy renderers |
| Subscription & Watermarks | ✓ 100% Free, Zero Watermarks | ✕ $29 - $79 / year subscriptions & watermarks |
| App Size & Cleanliness | 📦 Lightweight Split APK (~25 MB) | 120 MB - 250 MB bloated installs |
Install Smiley PDF in Under 30 Seconds
Standard secure Android sideload directly from GitHub Releases.
Download APK
Tap the Download button to grab the arm64-v8a APK straight from the official release.
Allow & Install
Tap the completed download notification in your browser. If prompted, toggle “Allow from this source”.
Read with a Smile
Open Smiley PDF. View documents, organize recents, bookmark your favorites, and enjoy ad-free reading forever.
Frequently Asked Questions
Start Reading PDFs Joyfully Today
Experience the fast, ad-free, and private document manager for Android. No subscriptions, no tracking, just pure reading.