24 free PDF tools and a document scanner for Android.
Everything runs on your phone. No ads, no sign-up, no tracking.

⬇ Download the latest APK  ·  All releases  ·  Privacy policy

Grab an APK from the latest release:

Needs Android 7.0 or newer. The built-in PDF viewer needs Android 12 with the latest system updates; on other phones PDFs open in your PDF app instead. The APKs are signed with the app's upload key; a copy installed from Google Play is signed with a different key, so remove one before installing the other.

• Camera scanner with live page-edge detection, auto or manual capture, flash, and front or back camera.
• Modes for documents, books (two pages per shot), ID cards (front and back on one page), business cards and whiteboards.
• Crop, rotate, filters (auto colour, light text, grayscale, whiteboard), brightness and contrast.
• Cleanup and markup brushes with any colour, including one picked straight off the page.
• Saved scans are searchable: on-device OCR adds an invisible text layer you can search and copy.

Pin the tools you use most to the top of Home. Every tool can preview its result before saving.

• Built-in viewer: smooth scrolling and zoom, select and copy text, search with highlights, links, page thumbnails, jump to page and a fast scroller. Password-protected PDFs open with their password.

• Folders, search, rename, move, share, and save a copy to any folder or as Word or JPEG.
• Optional two-way sync with a "PDF Tools" folder in your own Google Drive (drive.file scope: the app only sees what it created). Download, rename and delete Drive folders from the app.

• Light and dark themes in Tangerine, Black Cherry and Cool Blue, with grainy-gradient surfaces and a frosted tab bar.

Every tool, the scanner and OCR run on the device. Files leave the phone only if you turn on Google Drive sync, and then only to your own Drive. There are no ads, no analytics and no account.

Requirements: JDK 17 and the Android SDK (compile SDK 36 with SDK extension 19). Android Studio works too.

./gradlew :app:assembleDebug        # debug APK in app/build/outputs/apk/debug
./gradlew :app:installRelease       # release build on a connected phone

Release signing reads your upload key from ~/.gradle/gradle.properties (never the repo):

PDF_TOOLS_UPLOAD_STORE_FILE=/path/to/upload.jks
PDF_TOOLS_UPLOAD_STORE_PASSWORD=…
PDF_TOOLS_UPLOAD_KEY_ALIAS=…
PDF_TOOLS_UPLOAD_KEY_PASSWORD=…

Without it, release builds are signed with the debug key. Google Drive sync needs an Android OAuth client for the package name and your signing SHA-1 in Google Cloud.

Releases are built locally with the upload key (an APK per ABI plus a universal one, in app/build/outputs/apk/release) and attached to a GitHub release with the gh CLI. ./gradlew :app:bundleRelease builds the Play Store bundle.

./gradlew :app:assembleRelease -PallAbis
gh release create v2.1.0 app/build/outputs/apk/release/*.apk --title "PDF Tools v2.1.0"

./gradlew :app:testReleaseUnitTest                          # page geometry (JVM)
./gradlew :app:connectedDebugAndroidTest -PsideBySide       # every tool, the viewer and pins, on a phone

-PsideBySide installs the test build as a separate app (com.sammyi57.pdftools.test), so a run never touches your real files.

app/src/main/java/com/sammyi57/pdftools/
  Theme.kt, Kit.kt          palette, type and shared components
  Tools.kt                  the tool catalogue
  Pdf.kt, PdfRender.kt      PDF engine
  ToolScreen.kt, PageEditors.kt
  Scanner.kt, Review.kt, ScanModel.kt, DocCamera.kt, DocVision.kt
  Viewer.kt                 in-app viewer
  Storage.kt, Files.kt, Backup.kt
store-screenshots/          Play Store images

The privacy policy and terms are published at https://sammyzi.github.io/pdf-tools/ (built from the app's own text). Contact: [email protected].

Built with Jetpack Compose, Jetpack PDF, CameraX, PdfBox-Android, OpenCV, ML Kit, and the DocAligner page-detection model, among others. See THIRD_PARTY_NOTICES.md for every project and its licence.

MIT © 2026 SammyZi