Ink that gets out of the way
Windows Ink support, a direct pen surface, and the tools you need to underline the thought before it disappears.
PEN / HIGHLIGHT / SHAPEPDF annotation / Windows
Make the PDF feel like paper again.
A quiet, pen-first workspace for reading, marking, and reshaping documents on Windows.
A good page gives the idea somewhere to land.
A workspace, not a toolbox.
Open the document. Let the page stay in charge.
OpenNotes keeps the interface quiet and puts the document in the light. Read in one window, write with the pen you already know, and keep every mark close to the source.
The page is the product.
The OpenNotes rhythm
Read, mark, return.
Three small promises for a long document.
The whole PDF, in view
Tabs, recent files, thumbnails, bookmarks, and search keep the document’s shape in your head while you work.
OPEN / FIND / RETURNA file you can take with you
Annotate the PDF you already have, save it atomically, and keep your notes useful outside the app.
PDF / LOCAL / YOURSAt a glance
A calm surface for serious pages.
A modern Windows reading room for the moments when a document is more than a document: a class, a plan, a proof, a margin full of next steps.
- Pen, highlighter, shapes, eraser, and selection tools.
- Thumbnails, bookmarks, search, and page-level focus.
- Comfortable stylus input, including basic Huawei M-Pencil support.
v4.0.0Current release
WINWindows 10 / 11
PDFNative document
Leave room for your images
The page can show its own evidence.
Replace any filename below with your approved screenshot or mark. The page keeps a quiet fallback until then.
hero-editor.webp1600 × 1000Desktop editor overview
annotation-ink.webp1200 × 800Ink tools detail
textbox-resize.webp1200 × 800Resizable text box
dark-theme.webp1200 × 800Dark paper and chrome
page-templates.webp1200 × 800Page templates
opennotes-mark.svg512 × 512Product mark
Design notes
Less chrome. More contact.
A
Paper logic
Pages, margins, tabs, and marks are the structure — not a dashboard around it.
B
Direct hands
A click, a stroke, a drag. The gesture starts where your thought starts.
C
Honest files
Your PDF stays the center of gravity, ready to travel with the notes around it.
For the desk you already have
Make room for the page.
OpenNotes is a focused, open-source PDF annotation workspace for Windows. Bring a document in and start where the idea is.