---

A fully native PDF editor for your Mac

Khayyam PDF Editor is fully native macOS — no Electron, no web wrapper, no internet required. It’s built on Apple’s own PDFKit and SwiftUI, and your documents stay on your machine the whole time you’re working on them.

There’s no account to sign in to and nothing sent over the network. Opening, editing, and saving a PDF happens entirely offline, on your Mac.

What you can do with Khayyam PDF Editor

Mark up any PDF the way you think

Select text, drag to extend the selection, then click a tool. Colour pickers per tool remember your last choice.

• Highlight, underline, strikethrough with per-tool colours
• Sticky notes with inline double-click editing
• Freehand ink with adjustable stroke colour
• Typewriter text — font, size, bold, italic, colour, alignment
• All annotations are standard PDF — visible in any viewer

Combine or split any PDF in seconds

Drag PDFs into the Merge window, reorder by dragging, then export as one document. Or split any way you need.

• Merge unlimited PDFs by drag-and-drop
• 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

How it works

1. Download. Download the .dmg from this page. Drag the app to Applications. No admin password needed.
2. Open a PDF. Click Open PDF, drag a file onto the welcome screen, or right-click any PDF in Finder → Open With.
3. Pick a tool. Choose from the toolbar — Highlight, Draw, Edit Text, Print, and more. Hover any tool for a tooltip.
4. Save. ⌘S saves to the original. ⌘⇧S saves a new copy. Annotations are embedded as standard PDF.

System requirements

The name: Omar Khayyam

“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 calendar. The compass in the app icon references both: the astronomer measuring the stars, and the geometer drawing the proof.

Common questions

What’s new in version 1.1?

Version 1.1 adds Print — you can now send any open PDF straight to your printer from inside the app, without exporting it or opening a second program.

Is Khayyam PDF Editor really free?

Yes — free for personal use with no time limit and no feature restrictions. If you rely on it commercially, please consider supporting Oxin Studio.

Does it upload my documents anywhere?

No. The app is fully offline. Your PDFs are processed entirely on your Mac. There is no account, no telemetry, and nothing is sent over the network.

Will my annotations be visible in other PDF apps?

Yes. All annotations are saved as standard PDF annotations, visible in Preview, Adobe Acrobat, Chrome, and any other PDF viewer.

What does “Edit Text” do?

Edit Text uses the MuPDF engine to detect existing text blocks and lets you replace them in place. Scanned (image-only) PDFs cannot be edited this way.

Why does it require Apple Silicon?

The MuPDF library is compiled for arm64. Intel support is planned for a future release.

Is a Windows version planned?

Not currently. The app is built on Apple’s PDFKit and SwiftUI, which are macOS-only technologies.

---