FREE · EDUCATION & SCIENCE
Function Grapher.
Plot up to six functions of x on one graph, with automatic scaling, a value table and the zeros of each curve — save the graph as SVG.
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How to use Function Grapher
Type one function per line (2x, 3(x+1), sin(x), sqrt(x)…), set the x range and let the y range fit automatically or set it yourself.
How it works
Expressions are parsed by a small evaluator without eval, sampled at 600 points, drawn as SVG paths that break at discontinuities; zeros are found by sign change and bisection.
Example
sin(x), x²/4 − 1 and 0.5x + 1 are drawn from −2π to 2π; x²/4 − 1 crosses zero at −2 and 2.
Questions about Function Grapher
Is Function Grapher free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Real functions of one variable; angles in radians. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.