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- Free
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Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
- Free
- No sign-up
- Works on any device
Fill in the details to see your QR code.
PNG for phones, chats and websites. SVG and PDF stay sharp at any size, which is best for printing. Tip: point your phone camera at the preview to test it.
3. Style (optional): colors, dots, logo
Choose a photo or screenshot or drag it here
Works with photos of printed codes, screenshots and image files.
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Function grapher
Plot one or several functions like sin(x) and x^2 and zoom, with points of interest.
- Free
- No sign-up
- Works on any device
About Function grapher
Plot one or more functions such as sin(x), x^2 or 1/x on the same axes, then zoom and pan to explore. It marks points of interest like roots and intersections. Useful for seeing where two curves cross or how a parabola's vertex moves when you change a coefficient.
How to use Function grapher
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
How do I type powers and trig functions?
Use ^ for powers, for example x^2, and write functions with brackets, such as sin(x) or sqrt(x). Use * for multiplication when in doubt, like 2*x.
Is Function grapher free?
Yes. Function grapher on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.