Sharing a short piece of text between devices has never been as smooth as it should be. Most of us default to emailing ourselves, trying to AirDrop across incompatible ecosystems, or reading a password aloud while hoping no one mishears the fifth character.

Tools like QR codes already solve part of this problem. They work well, and they are widely supported. But sometimes you want something even simpler or just a little more fun.

That is where SendBySound fits in.

What It Does

SendBySound is a free web app at SendBySound.com that transfers text through sound. Open the site on two devices, type your message, and press send. One device plays a short sequence of tones, the other listens and decodes the text. Once the page loads, it works entirely offline.

There is no pairing, no accounts, and no installation.

How It Compares to QR Codes

QR codes are great in most situations. They are fast, reliable, and familiar. SendBySound is simply a different way to approach the same problem, and it can be useful in places where a sound-based interaction feels more natural.

A few examples:

• When the receiving device does not have a camera, or the camera is already in use.
• When you want to share across a short distance without positioning devices relative to each other.
• When generating or displaying a QR code is not as convenient.
• When you want a hands-free option.
• Or simply because sending little chirps between devices is fun.

SendBySound is not a replacement for QR codes. It is another tool you can reach for depending on the situation.

Everyday Uses

• Sharing a WiFi password without typing it out.
• Sending a link from a laptop to a phone without emailing yourself.
• Passing a verification code when your authenticator is on another device.
• Sharing small bits of information in classrooms or group settings.

If the devices can make and hear sound, you can use them.

Privacy and Simplicity

All processing happens locally in the browser. Nothing is sent to a server. The short-range nature of sound keeps transmission limited to the nearby environment.

Try It Out

If you're looking for a quick, offline-friendly, and slightly playful way to transfer text between devices, visit SendBySound.com and give it a try.

If you’d like, I can also format this for Markdown, generate an excerpt for the homepage, or create an OpenGraph description for link previews.