KillerPDF is a lightweight, portable PDF editor for Windows built for users who want full control without subscriptions, installers, or telemetry. It runs as a single executable, making it ideal for USB use and field work. You can view PDFs with smooth PDFium rendering, navigate quickly with thumbnails, zoom, and shortcuts, and reorganize pages using drag-and-drop. It supports merging multiple PDFs, splitting documents, and extracting selected pages.
KillerPDF also allows inline text editing with font matching to preserve the original layout, plus annotations like text boxes, freehand drawing, highlights, and reusable signatures. You can search full text, copy content easily, and print documents with flattened annotations.
Designed as a free and open alternative to bloated PDF tools, it works fully offline on Windows 10/11 x64. No runtimes install. Everything needed is inside the EXE (targets .NET Framework 4.8, which ships with every supported Windows release).
KillerPDF key features:
- High-quality PDF rendering via PDFium
- Edit PDF text inline (double-click to modify text)
- Page thumbnails and fast navigation with zoom and shortcuts
- Merge multiple PDFs into one
- Split PDFs and extract selected pages
- Drag-and-drop page reordering
- Font matching to preserve original document appearance
- Text boxes for notes
- Freehand drawing tools
- Highlight overlays with adjustable color, size, opacity
- Undo actions and clear per-page annotations
- Create, draw, and save reusable signatures
- Click-to-place signatures anywhere
- Full-text search with highlighted results
- Drag-select or Ctrl+A to copy text
- Print with annotations flattened
- Portable single-file app (~15 MB)
- No installer, no admin rights required
- No account, no telemetry
KillerPDF 1.6.0 changelog:
A big release: major new features, a full visual refresh, and an internal rewrite.
New
- Tabbed documents - open several PDFs at once, each restoring its page, zoom, and view
- OCR built into the exe (Tesseract) - OCR a page or dragged region to the clipboard, make a scan searchable, or extract all text; extra languages download on demand
- Digital signatures with a cloud certificate (Certum SimplySign), reusable signatures, and click-to-sign form fields
- Transform tool - rotate, scale, flip, and straighten a crooked scan, with live preview
- Edit existing text by double-clicking a line (the original is cleanly covered)
- Line tool, refreshed draw/highlight bars, resizable word-wrapping text boxes, and a full RGB color picker with eyedropper
- Print options (scale, position, margins, two-sided), page-number stamping, folder/.zip import, Document Info (F12), and recent files with file-type icons
- Translations: Bengali, Turkish, Simplified Chinese, German, French.
Changed
- New logo, icons, fonts, and colors throughout
- Six themes with per-theme accent colors; sidebar docks left or right; toolbar style picker
- Internal rewrite: the ~15,000-line main window split into ~40 focused files (no behavior change)
Fixed
- True 300 DPI printing, encrypted/damaged PDFs open on a background thread with a repair fallback, form fields render in every view mode, and undo is one item per press
Download: KillerPDF 1.6.0 | 14.6 MB (Open Source)
Link: KillerPDF Home Page | Github | Screenshot
