4:10 PM. Student sends a photo from the textbook. Tutoring starts in 5 minutes.
Online whiteboard with PDF
Drop a PDF worksheet or task photo onto the canvas. Pages serve as the backdrop for live solving, error marking, and handwritten notes. Students join via browser link, and the completed work can be saved or exported.
Multi-page PDF import on structured canvas
Drag a PDF file or task screenshot onto the board. In page mode, document pages become the background of sequential A4 pages, so handwriting and formulas stay anchored exactly where you place them.
No need to juggle a PDF reader and a separate whiteboard app. Both teacher and student view the same document in the same browser tab in real time.
Live collaborative writing, formulas and annotations
Highlight given values, insert LaTeX equations, or mark a calculation error with an arrow. The student writes using a stylus or keyboard simultaneously.
Annotations sit on top of the background layer: pen strokes, text, sticky notes, and diagnostic quiz checks. The underlying document remains crisp and intact.
Board persistence, student recap and export options
When the lesson finishes, the board remains reachable at the same link. The student can review the notes before an exam, while the tutor retains permanent access on their dashboard.
The free Basic plan allows exporting the board view as a PNG image. The Pro plan enables full multi-page PDF export with all handwritten annotations included.
“A PDF in chat is an archive. A PDF on the board is a lesson.”
Paste your first PDF on a board
Create an account, paste a PDF or task photo, and start working with the student on one board.
Frequently asked questions
You can drag and drop a PDF file or image directly into the workspace. In page mode, multi-page PDFs become the background of sequential pages, allowing you to annotate on top without shifting the document.
Students and teachers write, sketch, and add notes on the canvas layer above the document. The original PDF background is never modified, and board editing permissions can be adjusted.
The free Basic plan includes standard PNG export. The Pro plan adds multi-page PDF export preserving all pages and handwriting, as well as high-resolution PNG export.
The Basic plan includes up to 10 permanent boards, 5 folders, and up to 5 simultaneous collaborators. The Pro plan offers unlimited permanent boards and up to 50 folders. Temporary boards created in guest mode without an account remain active for 7 days.