View XOPP files in your browser
The notes Xournal++ saves, handwritten with a pen or a mouse, often over a PDF. Open one right here to see every page as it was written. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your notes are drawn page by page inside your browser, every stroke as the pen left it, then open fitted to your window, with the pages beside them.
- Every stroke • Pen, highlighter and pressure
- Page thumbnails • Type a page to go to it
- Search • The text typed on the pages
- Export • Save as PDF, PNG or JPEG
About XOPP
Xournal++ is a free note app for Windows, Mac and Linux, made for writing with a pen tablet: lecture notes, sketches, and marks on PDFs. Its XOPP files, and the XOJ files of the Xournal it grew from, are gzipped XML: each page's paper, then layers of strokes, typed text and pictures, in points from the page's top left.
Each stroke keeps its points and, when the pen felt its pressure, a width for every segment, so a line thickens and thins as it was written. A highlighter's color is saved half see-through. When the notes were written over a PDF or a picture, the file only names it: the PDF stays a file of its own, often on the computer the notes were made on.
Filepeek draws every page in your browser into a PDF: the paper's lines or grid, each stroke with its widths, the highlighter, typed text, which you can search and copy, and pictures. A PDF or picture the notes are drawn over isn't inside, so a note says which file it was, and the notes show on their own.
Xournal++ notes
.xopp • .xoj
Format
- MIME type
- application/x-xopp
- Made by
- The Xournal++ project
Inside the file
- Container
- gzipped XML
- Pages
- Paper, then layers of strokes, text and pictures
- Strokes
- Points, with a width for each segment
- Background
- Lines, a grid, or a PDF it names
Opens in every browser
Filepeek opens XOPP and XOJ files in Chrome, Edge, Firefox and Safari, with nothing to install. On their own, browsers download them, and only Xournal++ opens them.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open XOPP
- WindowsNo app built in opens it • Xournal++, free, opens and edits it
- MacNo app built in opens it • Xournal++, free, opens and edits it
- iPhone and iPadNo app opens it • Xournal++ runs only on computers
- AndroidNo app opens it • Xournal++ runs only on computers
Questions
How do I open an XOPP file without Xournal++?
Drop it on this page or choose Peek an XOPP. Its pages open in your browser with every stroke, highlight and line of typed text, and Export saves them as a PDF.
Why are my notes on blank pages?
Notes written over a PDF only name it, and the PDF stays a file of its own. Filepeek says which file it was and shows the notes alone. In Xournal++, Export as PDF puts them on the PDF together.
Can I turn Xournal++ notes into a PDF?
Yes. Choose Export, then Save as PDF. Each page is drawn into the PDF in your browser, its typed text kept as text, so it can still be searched and copied.
Does Filepeek open Xournal's old XOJ files?
Yes. XOJ is the format of Xournal, which Xournal++ grew from, and opens the same way, with its named colors and its highlighter.