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- Free
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- Works on any device
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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Tone generator
Play any frequency from 20 Hz to 20 kHz: sine, square and more. Test speakers and hearing, or download a WAV.
- Free
- No sign-up
- Works on any device
About Tone generator
Play a pure tone at any frequency from 20 Hz to 20 kHz using sine, square, triangle or sawtooth waves. Use it to test speakers and subwoofers, check hearing range, find resonances in a room, or tune an instrument to A at 440 Hz. You can also download the tone as WAV.
How to use Tone generator
- Set the options above. The result updates live.
- Change anything until it's just right.
- Copy the result or download it.
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
What frequency range can humans hear?
Young people hear roughly 20 Hz to 20 kHz. High frequencies fade with age, so many adults cannot hear above about 15 kHz.
Is Tone generator free?
Yes. Tone generator 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.