Khayyam PDF Editor for MS-Windows
Everything you need to work with PDFs on Windows
No Electron. No browser wrapper. No internet required. Your documents stay on your machine.
Annotate
Highlight, underline, and strikethrough text. Add sticky notes, typewriter overlays, and freehand ink drawings.
Draw Shapes
Drag to draw rectangles, ovals, and lines. Hold Shift to constrain to squares, circles, and 45° angles.
Edit Existing Text
Click any text block to edit it in place. Powered by PyMuPDF for accurate detection across complex layouts.
Merge & Split
Combine multiple PDFs or split by page count, specific page numbers, or extract any custom page range.
Insert Images
Place PNG or JPEG images onto any page. Resize and reposition freely. Embedded as standard PDF annotations.
Search & Navigate
Full-text search across every page. Thumbnail sidebar, table-of-contents outline, and direct page jump.
Clean, grouped toolbar. Nothing unnecessary.
Tools grouped by purpose, a thumbnail sidebar that stays out of the way, and a high-fidelity PDF viewer built on PyMuPDF + Qt.
Mark up any PDF the way you think
Select text, drag to extend the selection, then click a tool. Color pickers per tool remember your last choice.
- ✓Highlight, underline, strikethrough with per-tool colors
- ✓Sticky notes with inline double-click editing
- ✓Freehand ink with adjustable stroke color
- ✓Typewriter text — font, size, color, and alignment
- ✓All annotations are standard PDF — visible in any viewer
Combine or break apart any PDF in seconds
Add PDFs to the Merge list, reorder them, then export as one document. Or split any way you need.
- ✓Merge unlimited PDFs in any order
- ✓Split every N pages — one file per page if needed
- ✓Split at specific page numbers with comma-separated input
- ✓Extract any page range into a new document
- ✓Batch save all parts to a chosen folder
Up and running in under a minute
No account. No setup wizard. No cloud sync. Download, install, and open a PDF.
Download the Installer
Download Khayyam-PDF-Editor-Setup.exe from this page. No account required.
Run the Installer
Double-click the .exe and follow the setup wizard. Adds a Start Menu shortcut and optional PDF file association.
Open a PDF
Click Open PDF, drag a file onto the window, or right-click any PDF in Explorer → Open With → Khayyam.
Save
Ctrl+S saves to the original. Ctrl+Shift+S saves a new copy. Annotations embed as standard PDF.
Keyboard Shortcuts
Named after an 11th-century Persian genius
“The Moving Finger writes; and, having writ,
Moves on: nor all thy Piety nor Wit
Shall lure it back to cancel half a Line,
Nor all thy Tears wash out a Word of it.”
— Rubaiyat of Omar Khayyam, trans. Edward FitzGerald
Omar Khayyam (1048–1131) was a Persian mathematician, astronomer, and poet. He solved cubic equations geometrically with compass and conic sections — centuries before Europe. He reformed the Persian solar calendar into the Jalali calendar, still more accurate than the Gregorian. The compass in the app icon references both: the astronomer measuring the stars, and the geometer drawing the proof.
What you need
Windows 10 or 11 (64-bit)
x64 (Intel or AMD)
~80 MB installed
Not required after download
Khayyam for Windows is open source under the AGPL-3.0 license, required because it uses PyMuPDF / MuPDF for PDF rendering and text editing. Full source code is available on GitHub.