KingPDF KingPDF

Blazing-fast viewing of multi-hundred-MB documents and thousands of pages

Ultra-fast PDF Viewer + Editing + Conversion + More

High-performance · Freeware, Completely Free (Business Too)

Coming mid-September
KingPDF

KingPDF Feature Summary

  • Multi-hundred-MB documents open instantly — no 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

ViewingHuge documents / no blank flashes / tiled zoom / minimap
AnnotationsHighlight / Underline / StrikeOut / Ink / Text box + full undo
SavingIncremental save — original bytes preserved
InterfaceDark/light themes, session restore, side panels
InstallFast 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)

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.

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)
Coming mid-September