Version history

Osenpa PDF Tools release notes

What changed in each version, from newest to oldest.

Version 1.0.7 Latest

More reliable closing after PDF previews or splitting, clearer menus and updated processing components.

Fixed a crash that could occur when closing the application after PDF preview or Split operations.
Fixed clipped text in the More Options menu. Layouts were checked across all 16 supported languages, including right-to-left languages.
Updated the bundled .NET/WPF runtime to 8.0.33, ONNX Runtime to 1.31.1, OpenCvSharp to 4.13.0.20261107 and Tesseract OCR to 5.5.4.
Verified optional OCR and document-correction downloads, including primary and fallback links.
Verified upgrades from 1.0.6 preserve settings and downloaded components. Optional clean uninstall was also checked to ensure source PDFs and unrelated files remain protected.

More reliable PDF opening, previews and processing, with safer cancellation and shutdown.

Improved cancellation and resource cleanup to prevent conflicts between active PDF operations and closing documents.
Closing the app during an active operation asks for confirmation, then cancels the work and waits for cleanup.
Improved startup and background error handling, with more reliable local diagnostic logs.
Fixed an issue where cancelling PDF-to-image conversion on the final page could still produce completed output.
Updated bundled runtime and processing dependencies.
Processing remains local. Diagnostic logs exclude document contents, recognized OCR text and passwords, and are not uploaded automatically.

Clearer photographed documents, more useful progress information and smoother page previews.

Fix Documents (Beta) improves page selection, rotation, flattening, lighting and text clarity.
Document correction includes automatic OCR language detection. Review important recognized text, especially small footnotes or difficult photographs.
Progress shows the current stage, elapsed time and completed pages instead of an unreliable time-remaining estimate.
Page previews and background processing use memory more efficiently. Release notes are now in About, and Settings is simpler.
Automatic donation and Store review prompts have been removed. Optional component downloads and Explorer integration cleanup have been improved.

Version 1.0.4 adds BETA document-photo correction and improves local OCR, searchable PDFs, previews and accessibility.

Adds Fix Documents (Beta) for photographed books, forms and paper pages. It corrects perspective, page curve, rotation, shadows and uneven lighting before saving a separate result.
Exports corrected pages as standard A4 portrait or landscape PDFs without stretching the source image.
Keeps crop and rotation choices consistent across the editor, Cleaned preview, exported PDF and later OCR. Facing-page detection favors a complete page over a partly visible neighbor.
Uses All languages by default once all 16 selectable OCR packs are installed and verified. Manual single-language selection remains available.
Upgrades the local OCR runtime to Tesseract 5.5.3 and improves orientation, deskewing, reading order, small text, Unicode selection and word placement in searchable PDFs.
Keeps successful OCR pages when another page cannot be recognized, leaving the failed page image in the result.
Adds drag-to-pan and cursor-centered zoom to Original and Cleaned previews and improves precision-touchpad scrolling.
Simplifies Smart Recipes to Make a PDF easier to send, Meet an upload limit and Fix a scanned PDF.
Improves visible validation, keyboard navigation, F6 regions, screen-reader announcements and dialogs across all 16 interface languages.
Expands Settings and Help for OCR languages, optional components, document capture, zoom and accessibility.

Version 1.0.3 makes PDF tasks easier to follow and improves OCR defaults, Explorer input and result feedback.

Clarifies the input, options, output, progress and result stages of each task.
Makes searchable PDF the default OCR output while keeping alternative output choices available.
Improves Explorer multi-selection and fixes Merge, Compress, OCR and output-subfolder workflows.
Adds clearer compression feedback and Sign & Watermark preview behavior, plus accessibility improvements and 16 interface languages.

Improved compression for scanned PDFs, clearer compression choices and refined window layouts.

Improved compression of image-heavy and scanned PDFs, with more distinct quality-first, balanced, strong and target-size workflows.
Improved size-goal suggestions based on the selected file and expected compression behavior.
Refined translated labels, long-text layouts and cancellation of running jobs.
Added a Microsoft Store review reminder and changed donation and review reminders to rolling 30-day windows, with prompts spaced apart.
Added the official X contact link and clarified local processing and optional network actions. Existing user settings are retained during upgrades.

Cleaner focus states and more predictable window sizing, with settings preserved during upgrades.

Fixed unwanted black or dotted focus outlines around unrelated page areas after clicking empty space.
Added a Microsoft Store review button to Support.
The first launch uses a safe centered window size; later launches restore the last safe size.
Existing settings, logs, downloaded OCR language data and user files are preserved during package upgrades.

Earlier notes describe the app at that version. For current features and requirements, see the PDF Tools page.