Online whiteboard for mathematics
Draw shapes, plot function graphs and write formulas in proper mathematical notation. All in one browser tab, with nothing to install.
PhiBoard exists because ordinary online whiteboards handle drawing but not mathematics. A stacked fraction, an integral or a quadratic graph need tools built for the job.
What you get on the board
Function graphs
Type a formula and the graph appears at once. Linear, quadratic, exponential, logarithmic and trigonometric, with grid and axes.
Formulas in LaTeX
Stacked fractions, roots, sums, integrals and matrices written the way a textbook writes them, not approximated with keyboard characters.
Shapes and constructions
Segments, circles, angles and polygons drawn on a grid you can tighten or switch off. Made for geometry problems.
Work together live
Invite someone with a link and you both see the same changes at the same moment. No files sent back and forth.
How to start
Create a free account
An email address or a Google account is enough. We never ask for a card, because there is nothing to pay for.
Open a new board
Name it and pick a background: grid, squares, dots or plain white. Math tools sit in the left-hand panel.
Invite someone or work alone
The board saves itself. Come back any time, export to PDF or clone it as a template.
Frequently asked questions
Is the board really free?
Yes. Every math tool, an unlimited number of boards and live collaboration are available at no cost. There is no trial and no time limit.
Do I need to install anything?
No. PhiBoard runs in the browser on desktop, tablet and phone. A mobile app is on the way but is not required for anything.
Can I save a board and return to it later?
Yes. Every board stays on your account. Reopen it, clone it as a template or export it to a PDF file.
Does it suit both primary school and university?
Yes. The tools cover fractions and plane figures as well as derivatives, integrals and matrices, so the board follows a student through each stage.