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Function Grapher — Plot y = f(x)

Plot y = f(x) for any expression over a custom range — powers, trig, logs, roots. Client-side.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Type a function of x, e.g. x^2 - 4, sin(x), or 2*x + 1.
  2. 2 Set the x range to zoom in or out.
  3. 3 The graph redraws as you type.

Why use this tool

  • Plot any single-variable function instantly.
  • Supports powers, trig, logs, roots, π and e.
  • Runs entirely in your browser.

Frequently asked questions

What functions can I plot?

Any expression in x using + − × ÷, ^ (powers), parentheses, and functions like sin, cos, tan, ln, log, sqrt, abs, exp, plus the constants π (pi) and e.

Do I need to write the multiplication sign?

Usually no — 2x and 3(x+1) are understood. When in doubt, write * explicitly (2*x).

How is the curve drawn?

The function is sampled at 500 points across the x range and connected; gaps appear where the function is undefined (e.g. dividing by zero).

Can I plot trigonometric functions?

Yes — sin(x), cos(x), tan(x) and their inverses. Angles are in radians.

What is Function Grapher?

A function grapher plots the graph of a single-variable function y = f(x) over a chosen x range, supporting polynomials, trigonometric, logarithmic and exponential expressions.

Features

Live plotting

Graphs functions of x on a canvas as you type the expression.

Pan & zoom

Explore the curve across different domains and scales.

Free & private

Runs on your device — nothing is uploaded.

Example

Input

y = x^2

Output

Parabola through (−2,4), (0,0), (1,1), (2,4)

Common use cases

  1. 1

    Visualize functions

    See the shape of a polynomial, trig, or exponential function.

  2. 2

    Compare curves

    Plot several functions together to compare behaviour.

  3. 3

    Teach & study

    Illustrate roots, turning points, and asymptotes graphically.

Summary

Zerethon's function grapher plots one or more mathematical functions of x on an interactive canvas in your browser, with pan and zoom. Enter expressions like x^2 or sin(x) and see the curves rendered live. Everything runs client-side — nothing is uploaded.

Category
Math
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. Function Grapher runs entirely client-side — no server upload, no logging, no tracking of your input.

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