Dark, Light, High Contrast, Blood, Greed, and Cyanotic - switch live in the app. Try them on this page with the swatches up top.
High-quality PDFium rendering. Four view modes - single page, continuous scroll, two-page, and a grid of every page - plus thumbnails, Ctrl+scroll zoom, and keyboard shortcuts.
Double-click any line of text to edit it inline. Font matching from the original PDF preserves the look of the document.
Text boxes, freehand drawing, and highlight overlays with customizable colors, sizes, and opacity. Undo and clear per page.
Draw reusable signatures or import a PNG/JPG/BMP. Drop images onto any page as resizable annotations, burned into the PDF on save.
Combine multiple PDFs into one or extract selected pages into a new file. Drag-and-drop page reordering, rotate, and delete in the sidebar.
A built-in print dialog with a real page preview - pick printer, orientation, copies, and page ranges. Annotations are flattened into the output.
Save a fully uneditable version by rasterizing every page at 150 DPI via PDFium, now across multiple CPU cores for speed. Annotations burned in first.
Ctrl+F full-text search with highlighted results. Drag-select to copy text, or Ctrl+A to grab the whole page.
Fill interactive PDF forms - text fields, checkboxes, radio buttons - and save back. Outline/bookmark navigation in the sidebar.
Dark, Light, High Contrast, Blood, Greed, and Cyanotic, switchable live in Settings. The whole app, including this site, follows.
UI translated into English, Spanish, and Traditional Chinese, selectable in Settings. Contribute a translation on GitHub.
Drop the EXE anywhere and run it (USB, network share, Downloads), use the built-in installer, or winget install killerpdf. No admin rights needed.