Function Grapher
Plot up to three functions at once and compare them. Type any expression in x and it renders instantly.
Function GrapherLive
plot up to three functions
Controls
Data Inspector
Functions3
Samples600
EnginePolySim CAS
Governing equation
Reading this result: Plotting 3 functions sampled at 600 points over x ∈ [−10, 10]. Widen the range to expose end behavior and periodicity; narrow it to zoom in on roots and turning points where the curves cross the axis.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
★ Sign in to save this setupSave your tuned setup, or drop this simulation into your own site, docs, or course page.
How it works
Each function is parsed by PolySim's computer-algebra engine and sampled across your chosen range, then drawn on a shared set of axes. Great for comparing functions, checking transformations, and visualizing intersections.
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Frequently asked questions
Is this online function grapher tool really free?▾
Yes. Function Grapher runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.