Overview
PDFtuning is a professional PDF optimization tool for electronic reading. It uses intelligent layout and image algorithms to make papers, books, and technical files easier to read across Kindle, Kobo, iPad, Boox, and more.
Why Choose PDFtuning
Unlike generic PDF editors, PDFtuning is built specifically for reading comfort and cross-device adaptation:
- Multi-device live preview: Preview with 30+ built-in device models before exporting.
- Local processing only: No cloud upload required. Documents stay on your computer.
- One-click intelligent tuning: Smart Crop, TOC extraction, and other actions are optimized for simple execution.
- Reading-first optimization stack: Combines crop, reflow, image enhancement, and compression into one workflow.
Interface Overview
Preview & Device Panel (Left)
- Pick a target device to simulate real screen size and aspect ratio.
- Hide the device frame when you only want to inspect page content.
- Use floating tools for page navigation, TOC, landscape mode, and expanded crop preview.
File Management (Center)
- Manage multiple tasks with a visual card grid.
- Drag and drop one or more PDFs directly into the app.
- Use Original/Result previews and quick actions like Reveal in Finder and Send to...
Tuning Panel (Right)
- Smart Crop removes redundant margins while preserving useful headers/footers.
- TOC Outline generates clickable bookmarks for files without native outlines.
- Reflow converts wide or multi-column layouts into a single reading flow.
- Image Processing improves contrast and visual clarity.
- File Compression reduces size by tuning DPI and removing redundant objects.
Core Workflow
- Add files: drag PDFs into the center workspace.
- Select target device: choose a model closest to your real reading screen.
- Enable modules: turn on Smart Crop, TOC, Reflow, or image tools as needed.
- Start tuning: click Start Tuning, then compare Original and Result previews.
Key Highlights
Real-time visual feedback: When you adjust parameters, preview updates immediately so you can fine-tune quickly.
Expanded crop preview: Hold the Eye icon to compare full-page and expanded reading view in seconds.
FAQ
Q1. What makes PDFtuning different from common PDF tools?
It is designed around reading optimization and cross-device adaptation, not generic document editing.
Q2. Is my document secure?
Yes. Processing is local and offline. Files are not uploaded to cloud services.
Q3. Why is Reflow unavailable for some PDFs?
Reflow depends on embedded text structure. For scan/image PDFs, Smart Crop + Image Processing is usually better.
Q4. Why did file size increase after tuning?
Rasterization-heavy settings can enlarge files. Tune compression and DPI to balance quality and size.
Q5. What is the difference between Free and Pro?
Core optimization features are free. Pro adds a cleaner premium experience and supports long-term maintenance.
Pro Tips
- Batch-build TOC outlines for document libraries that lack bookmarks.
- Use Unify Crop Area to reduce horizontal jumping between pages.
- Compress first, then use Send to Kindle for a smoother wireless flow.