KingPDFKingPDF
Blazing-fast viewing of multi-hundred-MB documents and thousands of pages
Ultra-fast PDF Viewer + Editing + Conversion + More
Coming early October
指南
High-performance · Freeware, Completely Free (Business Too)
KingPDF Feature Summary
- Multi-hundred-MB documents open instantlyno blank pages while scrolling or zooming
- Tile rendering at high zoom + a minimap navigator in the corner
- Hand tool · Space panning · dark/light themes
- Five annotation tools (highlight, underline, strikeout, pen, text box) with full CJK support
- Undo/redo for every edit · standard annotations compatible with other viewers
- Thumbnail, bookmark and search panels · in-document links
- Session restore · opens password-protected PDFs
23 PDF Tools Built into KingPDF
No hunting for another program every time — KingPDF does it all.
Editing
PDF Viewer
Open and view PDFs instantly.
Merge PDF
Combine multiple PDFs into one.
Split PDF
Split a PDF by pages or ranges.
Reorder Pages
Rearrange pages in any order.
Insert Pages
Insert another PDF at any position.
Rotate PDF
Rotate pages left or right.
Delete Pages
Remove unwanted pages.
Extract Pages
Create a new PDF from selected pages.
Crop PDF
Trim page margins.
Page Numbers
Add page numbers to a PDF.
Watermark
Add text watermarks.
Compress · Convert
Compress PDF
Greatly reduce the size of scan- and photo-heavy PDFs.
PDF to JPG
Save PDF pages as JPG images.
PDF to PNG
Save PDF pages as PNG images.
PDF to Text
Extract just the text into a plain TXT file.
JPG to PDF
Bundle multiple JPG photos into one PDF.
PNG to PDF
Bundle multiple PNG images into one PDF.
Security
Remove Password
Remove the password from a protected PDF.
Sign
Place a signature image in a PDF.
Set Password
Protect a PDF with an open password.
Repair PDF
Rewrite and recover damaged PDFs.
Redact (Black Box)
Permanently black out selected areas.
Print
Print PDFs on a printer.
Feature Summary
- Viewing
- Huge documents / no blank flashes / tiled zoom / minimap
- Annotations
- Highlight / Underline / StrikeOut / Ink / Text box + full undo
- Saving
- Incremental save — original bytes preserved
- Interface
- Dark/light themes, session restore, side panels
- Install
- Fast install, completely free (business too)
System Requirements
- OS
- Windows 10 / 11 (64-bit)
- RAM
- 512MB or more recommended
- Disk
- 30MB install space
- License
- Freeware (completely free)
Supported Formats
- Viewing
- PDF 1.3 to 1.7 (including password-protected files)
- Saving
- incremental save (original version and data preserved)
- Annotations
- Highlight / Underline / StrikeOut / Ink / FreeText (standard)
FAQ
Yes. No ads, no watermarks — free for both personal and business use.
No. Incremental saving keeps the original data intact inside the file, and saving always creates a new file, so the original stays safe.
Yes. Glyph shapes are embedded directly into the file, so text renders correctly in Acrobat, Chrome, Edge and any other viewer.
It is designed around multi-hundred-MB documents. Opening, scrolling and zooming never freeze the app.
KingPDF KingPDF
Ultra-fast PDF Viewer + Editing + Conversion + More
Coming early October
High-performance · Freeware, Completely Free (Business Too)