yoshinoPDF 1.4.24
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Free, ad-free PDF viewer and editor
Copyright (C) 2026 Harukazu YOSHINO
Official website and downloads: https://yoshinograph.jpn.org/yp/
Platform: Windows 10 (22H2) / Windows 11, Intel/AMD x64

Features
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- Single-page, two-page, continuous, full-screen and thumbnail views.
- Tabs or separate windows, split views and side-by-side document layouts.
- Search, text/image copying, bookmarks and restored reading positions.
- Text/formula notes, sticky comments, highlight/underline/strikeout, shapes, images and redaction.
- Independent right annotation sidebar with filtering, full text, navigation, editing and deletion.
- Extract, delete, reorder, insert and rotate pages; crop margins; correct skew or perspective.
- Images to PDF, image-only PDF export, image export, printing and password settings.
- Offline multilingual voice navigation and document switching (microphone required).
- 21 interface languages, including Latina. Installed PDF operations work offline.
  OCR is not included. Perspective-corrected pages become images and lose text objects.

Install and update
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1. Download yp_1.4.24.zip from the official website and choose Extract All.
2. Run yoshinoPDF-1.4.24-Setup.exe and follow its instructions.
3. Launch the application from the desktop or Start menu.
No preinstalled Python or command input is needed. Administrator rights are normally unnecessary.
The first installation, or a missing cache, downloads Python, required libraries and English and selected optional speech models from their
upstream distributors. Internet access is required; allow about 1 GB for English alone and more space for additional models.
Default location: %LOCALAPPDATA%\Programs\yoshinoPDF
Before updating, save your edits and close every yoshinoPDF window.
Help > Check for updates checks the official website for newer releases.

Quick start
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- Choose File > Open (Ctrl+O), or drag a PDF onto the application.
- Choose a zoom between minus and plus, or type 10–500% and press Enter.
- Ctrl+S saves; Ctrl+Shift+S saves as; Ctrl+Z / Ctrl+Y undo and redo.
- Closing the last tab keeps the app open. Closing the last separate window
  with its title-bar close button exits. Separate-window/tab mode is remembered.
- Ctrl+F searches; Ctrl+Home / Ctrl+End jump to the document start / end.
- Crop margins shows odd/even previews side by side and copies regions either way.
- Pages > Perspective correction: position the four corners, preview and apply.
- Help > User guide provides full instructions. Keyboard shortcuts directly below it lists keys.
  Use Save as to preserve the original PDF.
- Change languages under Help > Language, then close all windows and restart.

Use File > Document information to edit or remove document properties, then save the PDF.
Author changes are remembered for new PDFs; existing authors are preserved.
Saving records the application and dates; recording can be disabled after removal.

- Enable Voice, then say next, back, top, end, switch, stop, page 215 or document 2.
  A number alone (two hundred fifteen) also selects a page. Japanese accepts
  cardinal and digit-by-digit numbers, 最初 (top) and 最後 (end).
  Select an installed speech language beside the voice button while it is off.
  Auto uses the UI language when installed, otherwise English. English is required.
  Run Setup to select or change optional models. Help > Voice commands lists commands.
  Say return to revisit reading positions recorded since voice was turned on.
  History has no count limit and is cleared when voice is turned off.
  Back / previous still moves backward by page or screen. Manual selection is remembered.
  Continuous mode scrolls by 85% of the viewport. Audio stays on your computer.

- The Voice menu also controls on/off and speech language. Enable its background
  command option to control the last selected document while working in other apps.
  This option is off by default.

Drag a tab or document frame title outside its window to move that document
to a separate window, or choose Window > Move to a separate window.
Drop a tab or document frame title onto another window to join it. Move a separate
window by its title bar. A title-bar move joins
all tabs when released over a blue-highlighted target. Drop image files on an
empty window to create a PDF, or on an existing page to paste images.

License and source
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GNU AGPL version 3 or later. Provided without warranty.
See LICENSE_AGPL.txt, THIRD_PARTY_NOTICES.txt and SOURCE_INFO.txt.
Corresponding source and build instructions are included in source.zip in the release package.
Python, PyMuPDF/MuPDF, Qt/PySide6, MathJax and other components retain their own licenses.
See history_en.txt (English) / history_jp.txt (Japanese) for release history.

