KillerPDF is unclaimed —

KillerPDF

Free, open-source PDF editor for Windows·pdf.killertools.net

KillerPDF is a native Windows PDF viewer, annotator, and light editor delivered as a single self-contained executable, with no account, subscription, or installer required. It renders documents with PDFium, performs OCR through Tesseract, and supports inline text editing, form filling and signing, merging and splitting, page stamping, and printing at 300 DPI — all processed locally with no telemetry and no ads. It also opens password-protected files by prompting for a password and repairs damaged or broken-xref PDFs.

What it's for

View and navigate PDFs in multiple view modes and tabsEdit text inline and add annotations, highlights, drawings and shapesOCR scanned pages or regions to make PDFs searchable or extract textMerge and split PDFs, including merging whole folders or zip filesFill and sign PDF forms, including with a cloud certificateStamp page numbers and watermarks across page rangesRotate, scale, flip and straighten crooked scansPrint with detailed layout control or flatten a documentOpen password-protected or damaged/broken-xref PDFsEdit and save PDF document metadata

Features 20

Built-in OCR on pages or dragged regions using Tesseract
Drag-to-reorder, rotate, and extract pages
Draw reusable signatures or sign with a cloud certificate (Certum SimplySign)
Edit and save PDF metadata (title, author, subject, keywords, creator)
Fill and save PDF forms
Flatten documents or export pages as PNG/JPEG
Four view modes: single page, continuous scroll, two-page, and page grid
In-app print preview with scale, margins, pages-per-sheet, and duplex options at 300 DPI
Inline text editing with font matching
Merge PDFs and split out pages, including from folders or zip files
On-demand download of extra OCR language models
Opens password-protected PDFs by prompting for a password
Repairs damaged or broken-xref PDF files
Rotate, scale, flip, and straighten crooked scans with live preview
Six themes with per-theme accent colors and dark-mode reading
Split pane view showing two documents side by side (F10)
Stamp page numbers or text watermarks across page ranges
Text boxes, freehand drawing, lines, and shapes with fill options
Text-hugging highlights with adjustable color, opacity, and width
Unlimited tabs with search, outlines, and clickable links

At a glance

free tieropen source

TypeDesktop app

DeploymentInstalled (local)

PlatformsWindows

LanguagesEnglish, Bengali, Czech, German, Spanish, French, Japanese, Turkish, Chinese (Simplified), Chinese (Traditional)

Integrations

Certum SimplySign

Resources

Pricing

KillerPDF is entirely free and open source (GPLv3) with no paid tiers, accounts, or subscriptions.

FreeFree

Free, open source under GPLv3. No accounts, subscriptions, telemetry, or ads.

None stated; single free version with no accounts or subscriptions